Liebert Network Card LDM User Manual

AC Power  
For Business-Critical Continuity™  
Liebert Distribution Monitoring (LDM)  
User Manual  
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TABLE OF CONTENTS  
i
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TABLES  
Table 1  
ii  
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SAFETY INSTRUCTIONS  
WARNING  
!
As with all types of electrical equipment, dangerous voltages exist within the equipment  
where the Liebert Distribution Monitor (LDM) is installed. For maximum safety, ensure  
power is removed and circuit breakers/disconnects are tagged/locked out per all applicable  
national, state and local electrical codes prior to working inside equipment.  
The area around the equipment must be free of any debris or standing water.  
All power and control wiring must be installed by a qualified electrician in accordance with  
the NEC and all applicable national, state and local codes.  
ONLY qualified service personnel should perform maintenance and/or service on the Liebert  
LDM. When performing maintenance and/or service on any component, verify test equipment  
is insulated and has been inspected prior to use.  
To avoid damage to the circuit boards, personnel handling these components should be  
wearing an Electrostatic Discharge strap or other approved protective device.  
When replacing or installing a solid core Current Transformer (CT), power must be removed  
from equipment to prevent damage to the CT and/or circuit board. If the CT is a split-core  
design, follow proper electrical safety procedures.  
These safety precautions are to be used in conjunction with NEC and local/state electrical  
code.  
1
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Glossary of Abbreviations  
1.0 GLOSSARY OF ABBREVIATIONS  
The following abbreviations are used in this manual.  
BCB  
BCMS  
BMS  
BSM  
DSP  
GUI  
Branch Circuit Monitoring Control Board  
Branch Circuit Monitoring System  
Building Management System  
BCMS Sensor Module  
Digital Signal Processor  
Graphical User Interface  
IGM  
Information Gathering Module  
Liebert Distribution Monitor  
Large Interface Board  
LDM  
LIB  
OCWC  
PBVI  
PCD  
PDU  
STP  
OpenComms Web Card  
Panelboard Voltage Current  
Power Conditioning Device  
Power Distribution Unit  
Service Terminal Protocol  
2
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Product Overview  
2.0 PRODUCT OVERVIEW  
The Liebert Distribution Monitor (LDM) monitors the main panelboard circuit breaker and individual  
panelboard branch circuit breakers. The measurements are used to report the current and alarm con-  
ditions for each breaker. The Liebert LDM utilizes branch circuit sensor modules and individual cur-  
rent transformers (CT) to monitor current. In addition, the Liebert LDM monitors options like  
subfeed and output circuit breakers and provides a full array of power parameters and alarms.  
The Liebert LDM is available as an option for the Liebert PPC™ Precision Power Center, Liebert  
FDC™, Liebert FPC™ and Liebert RDC™ Remote Distribution Cabinet.  
The Liebert LDM system can communicate with a Building Management System (BMS) and Liebert  
®
SiteScan Web.  
The Liebert LDM consists of a control board, panelboard voltage and current board, power supply  
boards and sensor modules and can monitor two 42-pole panelboards and three subfeed breakers.  
The Liebert LDM is capable of receiving input from 21-pole current sensor modules; two sensor mod-  
ules are required to monitor one 42-pole panelboard. The sensor module (BSM) contains twenty-one  
50A current transformers (CTs) capsulated in an epoxy-filled plastic enclosure designed to be  
mounted next to the panelboard. Sensor modules are designed to work with Square D™ and GE pan-  
elboards. If a sensor module CT fails, connections are provided for up to six replacement CTs. The  
optional CTs can be attached directly to the load cable feeding the failed CT.  
For branch breakers larger than 50A, discrete 100A rated large branch current transformers can be  
added. Higher-rated CTs can be used for monitoring optional subfeed circuit breakers. For subfeed  
breakers, like main panelboard breakers, the Liebert LDM monitors not only the 3-phase current but  
also the ground and neutral current. These subfeed circuit breakers are in addition to the 42 panel-  
board circuit breakers that can be monitored through the BSM. The Liebert LDM can accommodate  
18 individual large current transformers.  
®
If your Liebert power center is supplied with a Square D I-Line panelboard, the Liebert LDM can  
also monitor it as well as its output breakers. A large interface board (LIB) replaces the panelboard  
voltage and current board and can monitor up to 42 poles. Each LIB can monitor eight 5-wire I-Line  
and/or subfeed breakers including ground and neutral current. There can be 1 or 2 LIBs per control  
board that can monitor a total of sixteen 5-wire I-Line and/or subfeed breakers.  
The Liebert LDM has a Modbus port on the BCB for direct communication with a building manage-  
ment system (BMS). The Liebert LDM can communicate with Liebert SiteScan by using a Liebert  
SiteLink™ communication device. A Liebert SiteLink-2E™ is available as an option with the Liebert  
LDM and is mounted in the power center. Modbus Registry Summary documentation can be found at:  
Click on the link for the Liebert Distribution Monitor (LDM Toolkit). Save the file to a desktop or lap-  
top computer (PC) and extract the contents.  
3
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Major Components  
3.0 MAJOR COMPONENTS  
3.1 Branch Circuit Monitoring Control Board (BCB)  
The BCB is the main processing and storage circuit board of the Liebert LDM. It is a DSP-based logic  
controller with internal flash memory and non-volatile memory. The BCB also includes a battery-  
backed real time clock.  
One of the power parameters, kilowatt-hours (kWh), data is accumulated on this board for the panel-  
board mains, subfeeds and each branch circuit breaker. A Modbus command is provided to reset all  
accumulated power usage.  
4
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Major Components  
3.2  
Panel Board Voltage-Current Board (PBVI)  
The PBVI board monitors two panelboards and provides the voltage attenuators for the two panel-  
board voltages. The two sets of panelboard main breaker CTs are connected to the PBVI board.  
Connections for the 18 large branch CTs are located on the PBVI board. The nine CTs on the A side of  
the board are normally associated with the A-side voltages for power calculations. The B-side CTs are  
normally associated with the B-side voltages. A cross-configuration tool allows changing that associa-  
tion for subfeeds.  
The 18 large branch CT inputs can also be used to monitor up to three subfeed circuit breakers. This  
is configured using the Configuration tool (see 5.5 - Using the Configuration Tool). The CTs from  
the B side of the PBVI are cross-configured to the A side so that the three sub-feeds appear within the  
A-side panelboard register space. The 18 large branch breakers require CTs with 1A secondary.  
WARNING  
Connecting a 5A secondary type CT will damage the board and the CT.  
!
Before connecting a large CT to the PBVI board, note the CT MUST have 1A secondary.  
To ensure the proper current ratio and accuracy, the CTs should be purchased through  
Emerson Network Power. See Table 1 for details. Contact your local Emerson Network  
Power representative or call Liebert Services at 1-800-LIEBERT (1-800-543-2378).  
Table 1  
CT matrix for the Liebert LDM  
Part Number  
528415G1-L  
528415G2-L  
528415G3-L  
531461G6-L  
531461G9-L  
Description  
Phase CT Ground CT Neutral CT  
3 pole 100A Subfeed Breaker 5W CT Kit 23" Frame  
3 pole 125-225A Subfeed Breaker 5W CT Kit 23" Frame  
3 pole 250-400A Subfeed Breaker 5W CT Kit 23" Frame  
3 pole 0-100A I-Line & Subfeed Breaker 5W CT Kit 47" Frame  
3 pole 125-225A I-Line & Subfeed Breaker 5W CT Kit 47" Frame  
100:1  
200:1  
500:1  
200:1  
200:1  
500:1  
200:1  
200:1  
100:1  
100:1  
100:1  
100:1  
100:1  
100:1  
100:1  
100:1  
100:1  
200:1  
500:1  
500:1  
200:1  
500:1  
500:1  
531461G12-L 3 pole 250-400A I-Line & Subfeed Breaker 5W CT Kit 47" Frame  
531461G18-L 3 pole 0-225A I-Line Breaker 3W CT Kit 47" Frame  
531461G19-L 3 pole 250-400A I-Line Breaker 3W CT Kit 47" Frame  
528461G13-L 1 pole 0-100A Branch Breaker CT Kit  
528415G14-L 2 pole 0-100A Branch Breaker CT Kit  
528415G15-L 3 pole 0-100A Branch Breaker CT Kit  
5
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Major Components  
3.3  
Large Interface Board (LIB)  
The LIB provides the voltage attenuators for Square D I-Line panelboard  
voltages. The LIB monitors the current for the I-Line panelboard. The  
panelboard input CTs are connected to the LIB board. There are 42 CT  
inputs provided. The current inputs require the use of 1A secondary CT.  
WARNING  
MUST have 1A secondary. Connecting a 5A secondary type CT  
!
Before connecting a large CT to the PBVI board, note the CT  
will damage the board and the CT.  
To ensure the proper current ratio and accuracy, the CTs should  
be purchased through Emerson Network Power. See Table 1 for  
details. Contact your local Emerson Network Power  
representative or call Liebert Services at 1-800-LIEBERT  
(1-800-543-2378).  
There can be up to two LIB boards per control board for a maximum total of sixteen 5-wire output  
breakers.  
3.4  
Branch Circuit Monitoring Sensor Module (BSM)  
The BSM—more commonly referred to as the CT Module—is packaged in an epoxy-filled plastic  
assembly. There are two designs: one for 1" center-to-center GE panelboards and one for 3/4" center-  
to-center for Square D panelboards. Each contains twenty-one 50A CTs that are rated up to 50A RMS  
50/60 Hz.  
NOTE  
The diameter of each CT hole is 0.354" (9mm). Wire diameter and thickness of insulation  
cannot be larger than the CT opening.  
For the 42-breaker position in-line panel boards, the Square D CT Module is designed to interlock end  
to end to maintain alignment between the breaker poles and the CT Module.  
3.5  
Power Supply Assembly (with EMI Filter)  
The power supply assembly is 120-240VAC (range +6, -13%) 50/60 Hz input, 24VDC output to provide  
logic level power for the BCB.  
6
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Installation  
4.0 INSTALLATION  
WARNING  
!
Dangerous voltages exist in power distribution units and power conditioning units. To ensure  
maximum safety, all circuits breakers in the panelboard should be removed of power and the  
input feeder breaker should be turned off and locked-out in accordance with NEC and local/  
state code.  
NOTE  
Installation of Liebert LDM components or other monitoring devices should be performed by  
qualified personnel only.  
This section provides instructions for installing and connecting Liebert LDM current transformers. If  
service needs to be performed on any Liebert LDM component, contact Emerson Network Power Lie-  
bert Services at 1-800-LIEBERT (1-800-543-2378) for assistance.  
4.1  
Installing a BSM (CT Module Assembly)  
In most cases the BSM—the CT Module—is factory-installed and no further work is required. If you  
need to add a CT Module, it attaches easily to the side of a panelboard to monitor any combination of  
1-, 2- and 3-pole circuit breakers.  
• For side-by-side panelboards (21 circuits on each side), attach one  
CT Module to each side of the panelboard, ensuring that the center of  
the CT hole lines up to the branch circuit breaker connection.  
• For SqD Inline panelboards (42 circuits in a row), the two CT Mod-  
ules must be interlocked to monitor 42 inline circuits. Flip the second,  
lower CT Module so that the two cutout sections line up, then attach  
the screws to secure the CT Modules to the panelboard.  
• For GE Inline type panelboards, the two CT Modules fit end to end.  
Flip the second, lower CT Module so that the 50-pin ribbon cable con-  
nector, mounted on the bottom of the CT Module, lines up with the hole  
in the panelboard mounting bracket.  
Install the circuit breakers according to the manufacturer’s documentation.  
Route the circuit wire through the center of the CT and attach securely to  
the circuit breaker.  
4.1.1 Connecting Panelboards A and B  
The CT Module connects to the BCB via a 50-pin ribbon cable  
attached to the back of the CT Module. Route the ribbon cable  
and attach to the appropriate connector (see figure at right).  
There are four connectors that are labeled for easy identification:  
two for Panelboard A (A1 and A2) and two for Panelboard B  
(B1 and B2).  
• Connect the CT module that will monitor Circuits 1-21 to the  
A1 or B1 connector, depending on whether the CT Module is  
connected to Panelboard A or B.  
• Connect the CT module that will monitor Circuits 22-42 to  
the corresponding A2 or B2 connector.  
Circuits  
Monitored  
Panelboard A Panelboard B  
Connector  
Connector  
1-21  
A1  
A2  
B1  
B2  
22-42  
To configure branch circuits, see 5.5.12 - Adding a Circuit Breaker.  
7
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Installation  
4.2  
Installing a Solid-Core Current Transformer  
WARNING  
!
A solid-core CT cannot be installed on a wire while current is flowing through the wire.  
Damage to burden resistor and CT will occur. Power needs to be removed prior to installing  
and/or removing any CT. CTs should be installed by qualified electricians only.  
The CT for the panelboard main input circuit breaker is hard-wired to the connectors. Removing CT  
wires from the connector requires a pin extraction tool. Contact Liebert Services at 1-800-LIEBERT  
(1-800-543-2378) for assistance.  
NOTE  
When replacing or installing a CT, ensure the replacement CT has a secondary rating of 1A—  
for example, 100:1, 200:1 or 500:1. Using a higher-rated CT—for example, 100:5 or 500:5—will  
damage the burden resistors on the PBVI board.  
Typically the three-phase and neutral wires utilize a CT rating of 100:1, 200:1 or 500:1, while the  
ground wire utilizes a CT rating of 100:1.  
Route the circuit wire through the core of the CT and wire-tie the CT to the cable. Refer to the manu-  
facturer’s documentation for proper orientation to ensure accurate readings. Generally, CTs have an  
arrow, white dot or similar marking to indicate how to position the CT.  
For the Liebert LDM, CTs have a white dot that must face the source on the three-phase wires and  
must face the load on the neutral and ground wires.  
NOTE  
When installing CTs for a large branch circuit breaker or subfeed, verify which monitoring  
board is installed.  
• A PBVI board can support one subfeed per panelboard (if neutral and ground will be  
monitored) or up to three subfeeds if neutral and ground are not monitored.  
• One LIB can support up to eight output and/or subfeed breakers.  
• Two LIB boards are provided to support up to 16 output and/or subfeed breakers.  
8
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Installation  
4.3  
Connecting a Current Transformer to the PBVI Board  
If subfeed breakers are ordered with the unit, the phase CTs are installed and wired to the PBVI. The  
neutral and ground CTs are also factory-supplied and wired to the PBVI board.  
Since the CTs must be installed on the subfeed breaker’s neutral and ground cables, they cannot be  
installed in the factory. They are located in the bottom of the unit in front of the transformer.  
CTs have an arrow, white dot or similar marking that depicts how to position the CT on the cable to  
ensure accurate readings. The arrow, white dot or similar marking must face the load when installing  
the CT on the ground and neutral cable. Route the neutral and ground cable through the core of the  
CTs and wire-tie the CT to the cable.  
If subfeed breakers are installed in the field, up to five CTs may be installed to monitor a subfeed  
breaker (three phases, neutral and ground). The neutral and ground CTs may be omitted if monitor-  
ing of neutral and ground is not required.  
On large branch circuit breakers, ground and neutral is not monitored.  
There are two 18-pin terminal blocks on the PBVI for large branch circuit breakers and/or subfeeds—  
one for Panelboard A and one for Panelboard B.  
The circuit board is marked with a triangle to indicate Pin 1.  
• Pin 1 should be used for the white wire of CT1 (Phase A)  
• The black wire should be connected to Pin 2.  
• The same pattern will follow for the remaining CTs.  
After all CTs are installed, use the Configuration tool to label and set alarm parameters. To configure  
If the Power Distribution Center is supplied with optional isolated ground, the isolated ground circuit  
can be monitored by the Liebert LDM.  
• Connect the isolated ground CT to Pins 17 and 18 on the two 18-pin terminal blocks on the PBVI.  
• Connect the isolated ground CT white wire to Pin 17 and the CT black wire to Pin 18.  
CTs for the  
three phases  
CT for neutral  
and ground  
Five CT  
connection  
Refer to the following example and Table 2 for wiring configuration details.  
Example: When installing a subfeed breaker where the three phases, neutral and ground will be  
monitored, the CTs should be wired as follows:  
Pin  
1
Wiring  
Phase A CT  
White wire  
Black wire  
White wire  
Black wire  
White wire  
Black wire  
White wire  
Black wire  
White wire  
Black wire  
2
Phase A CT  
Phase B CT  
Phase B CT  
Phase C CT  
Phase C CT  
Neutral CT  
Neutral CT  
Ground CT  
Ground CT  
3
4
5
6
7
8
9
10  
If neutral and ground will not be monitored, Pins 7-10 may be used instead for a second subfeed  
(Phase A and Phase B CTs).  
9
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Installation  
4.4  
CT Table for PBVI Board  
Table 2 shows the configuration of large branch circuit breakers and their CT assignments.  
Table 2  
Wiring configuration of large branch circuit breakers  
Configuration 1: Four Modules  
Connector P3 (A)  
Connector P4 (B)  
Pins  
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16 17 18  
Wire Color  
W
B
W
B
W
B
W
B
W
B
W
B
W
B
W
B
W
B
CT9  
or IG  
CT  
CT1  
CT2  
CT3  
CT4  
CT5  
CT6  
CT7  
CT8  
1
Pins  
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16 17 18  
Wire Color  
W
B
W
B
W
B
W
B
W
B
W
B
W
B
W
B
W
B
CT18  
or IG  
CT  
CT10  
CT11  
CT12  
CT13  
CT14  
CT15  
CT16  
CT17  
Configuration 2: Two Modules With Large Branch Breaker CTs  
Connector P3 (A)  
Pins  
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16 17 18  
Wire Color  
W
B
W
B
W
B
W
B
W
B
W
B
W
B
W
B
W
B
LB9  
or IG  
CT  
LB1  
LB2  
LB3  
LB4  
LB5  
LB6  
LB7  
LB8  
Connector P4 (B)  
Pins  
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16 17 18  
Wire Color  
W
B
W
B
W
B
W
B
W
B
W
B
W
B
W
B
W
B
LB18  
or IG  
CT  
LB10  
LB11  
LB12  
LB13  
LB14  
LB15  
LB16  
LB17  
Configuration 3: Four Modules With Two 5-Wire Subfeed Breaker CTs  
Connector P3 (A)  
Pins  
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16 17 18  
B
Wire Color  
CT  
W
B
W
B
W
B
W
B
W
LB1  
A1  
LB2  
B1  
LB3  
C1  
LB4  
N1  
LB5  
G1  
IG  
Phase  
Connector P4 (B)  
Pins  
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16 17 18  
B
Wire Color  
CT  
W
B
W
B
W
B
W
B
W
LB6  
A2  
LB7  
B2  
LB8  
C2  
LB9  
N2  
LB10  
G2  
IG  
Phase  
Configuration 4: Four Modules With Three 5-Wire Subfeed Breaker CTs  
Connector P3 (A)  
Pins  
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16 17 18  
Wire Color  
CT  
W
B
W
B
W
B
W
B
W
B
W
B
W
B
W
B
W
B
LB1  
LB2  
B1  
LB3  
C1  
LB4  
N1  
LB5  
G1  
LB11  
N3  
LB12  
G3  
IG  
Phase  
A1  
Connector P4 (B)  
Pins  
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16 17 18  
Wire Color  
CT  
W
B
W
B
W
B
W
B
W
B
W
B
W
B
LB6  
A2  
LB7  
B2  
LB8  
C2  
LB9  
N2  
LB10  
G2  
LB11  
A3  
LB12  
B3  
LB13  
C3  
IG  
Phase  
W = White  
B = Black  
IG = Isolated Ground CT  
LB = Large Branch Breaker CT  
A = A Phase CT  
B = B Phase CT  
C = C Phase CT  
N = Neutral CT  
G = Ground CT  
10  
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Installation  
Table 2  
Wiring configuration of large branch circuit breakers (continued)  
Configuration 5: Four Modules With Six 3-Wire Subfeed Breaker CTs  
Connector P3 (A)  
Pins  
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16 17 18  
Wire Color  
CT  
W
B
W
B
W
B
W
B
W
B
W
B
W
B
W
B
W
B
LB1  
A1  
LB2  
B1  
LB3  
C1  
LB4  
A2  
LB5  
B2  
LB6  
C2  
LB7  
A3  
LB8  
B3  
LB9  
C3  
Phase  
Connector P4 (B)  
Pins  
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16 17 18  
Wire Color  
CT  
W
B
W
B
W
B
W
B
W
B
W
B
W
B
W
B
W
B
LB10  
A4  
LB11  
B4  
LB12  
C4  
LB13  
A5  
LB14  
B5  
LB15  
C5  
LB16  
A6  
LB17  
B6  
LB18  
C6  
Phase  
Configuration 6: Three Modules With Nine Large Branch Breaker CTs  
Connector P3 (A)  
Pins  
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16 17 18  
Wire Color  
W
B
W
B
W
B
W
B
W
B
W
B
W
B
W
B
W
B
LB9  
or IG  
CT  
LB1  
LB2  
LB3  
LB4  
LB5  
LB6  
LB7  
LB8  
Connector P4 (B)  
Pins  
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16 17 18  
W = White  
B = Black  
IG = Isolated Ground CT  
LB = Large Branch Breaker CT  
A = A Phase CT  
B = B Phase CT  
C = C Phase CT  
N = Neutral CT  
G = Ground CT  
11  
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Installation  
4.5  
Connecting a Current Transformer to the LIB Board  
LIB can monitor eight 5-wire output/subfeed breakers. Two LIB boards are provided to support up to  
16 output and/or subfeed breakers. If subfeed breakers are ordered with the unit, the phase CTs are  
installed and wired to the LIB. The neutral and ground CTs are also factory-supplied and wired to the  
LIB.  
Since the CTs must be installed on the subfeed breaker’s neutral and ground cables, they cannot be  
installed in the factory. They are located in the bottom of the unit in front of the transformer.  
CTs have an arrow, white dot or similar marking that depicts how to position the CT to ensure accu-  
rate readings. The arrow, white dot or similar marking must face the load when installing the CT on  
the ground and neutral cable. Route the neutral and ground cable through the core of the CTs and  
wire-tie the CT to the cable.  
If subfeed breakers are installed in the field, up to five CTs may be installed to monitor a subfeed  
breaker (three phases, neutral and ground). The neutral and ground CTs may be omitted if monitor-  
ing of neutral and ground is not required.  
The designators on the LIB are different from those on the PBVI board.  
• CT1 (Phase A white wire) begins on TB1 CT1+ and the black wire connects to CT1-.  
• The Ground CT for the first subfeed/output circuit breaker connects to TB4 CT35.  
Four CTs  
Ground CT  
(three phases  
and neutral)  
Refer to the example below and Tables 3 and 4 for wiring configuration details.  
Example: The above pictures show how to install CTs for a subfeed or I-Line output circuit breaker  
with neutral and ground being monitoring. The CTs should be wired as follows:  
First Breaker  
Phase A CT  
Phase A CT  
Phase B CT  
Phase B CT  
Phase C CT  
Phase C CT  
Neutral CT  
Second Breaker  
CT1+  
CT1-  
White wire  
Black wire  
White wire  
Black wire  
White wire  
Black wire  
White wire  
Black wire  
White wire  
Black wire  
CT5+  
CT5-  
Phase A CT  
Phase A CT  
Phase B CT  
Phase B CT  
Phase C CT  
Phase C CT  
Neutral CT  
Neutral CT  
Ground CT  
Ground CT  
White wire  
Black wire  
White wire  
Black wire  
White wire  
Black wire  
White wire  
Black wire  
White wire  
Black wire  
CT2+  
CT2-  
CT6+  
CT6-  
CT3+  
CT3-  
CT7+  
CT7-  
CT4+  
CT4-  
CT8+  
CT8-  
Neutral CT  
CT35+  
CT35-  
Ground CT  
Ground CT  
CT36+  
CT36-  
If more output or subfeed CTs need to be installed, continue in the same pattern shown above.  
• Connect the Phase A CT for the second breaker on CT5 (white wire to CT5+, black to CT5-).  
• Connect the Ground CT for the second breaker to CT36 (white wire to CT36+, black to CT36-).  
• Continue the same pattern until all CT connections are used or there are no more output or sub-  
feed CTs to add.  
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Installation  
4.6  
CT Table for LIB  
Tables 3 and 4 show the CT assignments for 10 output breaker CTs and three subfeed breaker CTs  
with neutral and ground being monitored.  
Table 3  
Wiring configuration for LIB 1  
Pins  
18 17 16 15 14 13 12 11 10  
9
+
8
-
7
+
6
-
5
+
4
-
3
+
2
-
1
+
-
+
-
+
-
+
-
+
-
Connector  
TB1  
Wire Color  
CT  
B
W
B
W
B
W
B
W
B
W
B
W
B
W
B
W
B
W
CT9  
A3  
CT8  
N2  
CT7  
C2  
CT6  
B2  
CT5  
A2  
CT4  
N1  
CT3  
C1  
CT2  
B1  
CT1  
A1  
Phase  
Pins  
18 17 16 15 14 13 12 11 10  
9
+
8
-
7
+
6
-
5
+
4
-
3
+
2
-
1
+
-
+
-
+
-
+
-
+
-
Connector  
TB2  
Wire Color  
CT  
B
W
B
W
B
W
B
W
B
W
B
W
B
W
B
W
B
W
CT18  
B5  
CT17  
A5  
CT16  
N4  
CT15  
C4  
CT14  
B4  
CT13  
A4  
CT12  
N3  
CT11  
C3  
CT10  
B3  
Phase  
Pins  
18 17 16 15 14 13 12 11 10  
9
+
8
-
7
+
6
-
5
+
4
-
3
+
2
-
1
+
-
+
-
+
-
+
-
+
-
Connector  
TB3  
Wire Color  
CT  
B
W
B
W
B
W
B
W
B
W
B
W
B
W
B
W
B
W
CT27  
C7  
CT26  
B7  
CT25  
A7  
CT24  
N6  
CT23  
C6  
CT22  
B6  
CT21  
A6  
CT20  
N5  
CT19  
C5  
Phase  
Pins  
18 17 16 15 14 13 12 11 10  
9
+
8
-
7
+
6
-
5
+
4
-
3
+
2
-
1
+
-
+
-
+
-
+
-
+
-
Connector  
TB4  
Wire Color  
CT  
B
W
B
W
B
W
B
W
B
W
B
W
B
W
CT2  
G2  
CT1  
G1  
NONE  
NONE  
CT32  
N8  
CT31  
C8  
CT30  
B8  
CT29  
A8  
CT28  
N7  
Phase  
Pins  
12 11 10  
9
+
8
-
7
+
6
-
5
+
4
3
+
2
-
1
+
-
+
-
-
Connector  
TB5  
Wire Color  
CT  
B
W
B
W
B
W
B
W
B
W
B
W
CT8  
G8  
CT7  
G7  
CT6  
G6  
CT5  
G5  
CT4  
G4  
CT3  
G3  
Phase  
W = White  
B = Black  
A = A Phase  
B = B Phase  
C = C Phase  
N = Neutral  
G = Ground  
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Installation  
Table 4  
Wiring configuration for LIB2  
Pins  
18  
-
17  
+
16 15 14 13 12 11 10  
9
+
8
-
7
+
6
-
5
+
4
-
3
+
2
-
1
+
-
+
-
+
-
+
-
Connector  
TB1  
Wire Color  
CT  
B
W
B
W
B
W
B
W
B
W
B
W
B
W
B
W
B
W
CT41  
A11  
CT40  
N10  
CT39  
C10  
CT38  
B10  
CT37  
A10  
CT36  
N9  
CT35  
C9  
CT34  
B9  
CT33  
A9  
Phase  
Pins  
18  
-
17  
+
16 15 14 13 12 11 10  
9
+
8
-
7
+
6
-
5
+
4
-
3
+
2
-
1
+
-
+
-
+
-
+
-
Connector  
TB2  
Wire Color  
CT  
B
W
B
W
B
W
B
W
B
W
B
W
B
W
B
W
B
W
CT50  
B13  
CT49  
A13  
CT48  
N12  
CT47  
C12  
CT46  
B12  
CT45  
A12  
CT44  
N11  
CT43  
C11  
CT42  
B11  
Phase  
Pins  
18  
17  
+
16 15 14 13 12 11 10  
9
+
8
-
7
6
5
+
4
3
+
2
-
1
-
-
+
-
+
-
+
-
+
-
-
+
Connector  
TB3  
Wire Color  
CT  
B
W
B
W
B
W
B
W
B
W
B
W
B
W
B
W
B
W
NONE  
NONE  
NONE  
NONE  
NONE  
NONE NONE  
CT52  
N13  
CT51  
C13  
Phase  
Pins  
18  
-
17  
+
16 15 14 13 12 11 10  
9
+
8
-
7
+
6
-
5
+
4
-
3
2
1
+
-
+
-
+
-
+
-
+
-
Connector  
TB4  
Wire Color  
CT  
B
W
B
W
B
W
B
W
B
W
B
W
B
W
CT10  
G10  
CT9  
G9  
NONE  
NONE  
NONE  
NONE NONE NONE NONE  
Phase  
Pins  
12  
-
11  
+
10  
-
9
+
8
-
7
+
6
-
5
+
4
-
3
+
2
-
1
+
Connector  
TB5  
Wire Color  
CT  
B
W
B
W
B
W
B
W
B
W
B
W
NONE  
NONE  
NONE  
CT13  
G13  
CT12  
G12  
CT11  
G11  
Phase  
W = White  
B = Black  
A = A Phase  
B = B Phase  
C = C Phase  
N = Neutral  
G = Ground  
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Operation  
5.0 OPERATION  
The Liebert LDM is a factory-installed option to provide monitoring of the main breaker, branch cir-  
cuit breakers and subfeed breakers. It may be installed in the Liebert PPC Precision Power Center,  
Liebert FDC, Liebert FPC and Liebert RDC Remote Distribution Cabinet.  
Software available on Liebert’s Web site (see 5.3 - Downloading the Software) can be installed on a  
desktop or laptop computer (PC) to monitor status and configure breaker parameters and alarm set-  
points. These monitoring and configuration functions are described in 5.4 - Using the Monitor Tool  
The Liebert LDM monitors and displays the parameters listed in Table 5.  
Parameters monitored for breakers  
Table 5  
Displayed and monitored for each:  
Panelboard  
branch  
circuit breaker  
Panelboard main  
circuit breaker and  
SqD I-Line panelboard  
SqD I-Line  
panelboard  
circuit breaker  
Subfeed  
circuit  
breaker  
Parameters  
Voltage  
Line-to-line  
Line-to-neutral  
Phase Current  
Neutral Current  
Ground Current  
kVA  
kW  
kW-Hours  
Percent Load  
Power Factor  
Crest Factor  
Voltage Total Harmonic Distortion (THD)  
Current Total Harmonic Distortion (THD)  
Circuit identification and status of each breaker are also displayed. Parameters are updated every  
500msec.  
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Operation  
5.1  
Alarms  
The Liebert LDM constantly monitors configured parameters for normal values. When the unit  
detects an alarm condition, it annunciates and displays alarm messages via the Monitor program (see  
Alarms must be manually reset after the alarm condition has been corrected and may be reset  
through Modbus.  
To facilitate troubleshooting:  
• All alarms are stored in non-volatile memory to protect against erasure by a power outage.  
• Alarms are saved in an event log. The event log stores up to 128 events using a first-in, first-out  
format (FIFO).  
All alarm thresholds for monitored parameters are adjustable by using the Configuration tool to  
match site requirements (see 5.5 - Using the Configuration Tool).  
Table 6 shows the types of alarms for the various types of breakers, along with a description, factory  
default setpoints and allowable range for each.  
Table 6  
Alarm conditions and factory setpoints  
Alarm  
Description  
Default setting  
Range  
Branch Breakers  
• Overcurrent Warning  
• Overcurrent Alarm  
Current exceeds 75% of breaker amps  
Current exceeds 80% of breaker amps  
15A  
16A  
0-75%  
10-80%  
0%, which  
disables  
• Low Current Alarm  
Minimum current level of a branch breaker  
0-70%  
the alarm  
Panelboard Main Breaker and SqD I-Line Panelboard  
• Phase Overcurrent Warning  
• Phase Overcurrent Alarm  
• Neutral Overcurrent Alarm  
• Ground Overcurrent Alarm  
Current exceeds 75% of breaker amps  
170A  
180A  
214A  
5A  
0-75%  
10-80%  
10-200%  
1-50A  
Current exceeds 80% of breaker amps  
Current exceeds 95% of breaker amps  
Current exceeds 5 amps  
At least one of the line-to-line voltages exceeds +6% of  
nominal  
• Overvoltage Alarm  
• Undervoltage Alarm  
0-50%  
0-50%  
At least one of the line-to-line or line-to-neutral voltages  
falls below -13% of nominal  
Subfeed Breakers and I-Line Output Breakers  
• Phase Overcurrent Warning  
• Phase Overcurrent Alarm  
Current exceeds 75% of breaker amps  
170A  
180A  
0-75%  
Current exceeds 80% of breaker amps  
10-80%  
0%, which  
disables  
• Low Current Warning  
Minimum current level of a branch breaker  
0-70%  
the alarm  
• Neutral Overcurrent Alarm  
• Ground Overcurrent Alarm  
Summary Alarm  
Current exceeds 95% of breaker amps  
Current exceeds 5 amps  
214A  
5A  
10-200%  
1-50A  
Detects and annunciates upon occurrence of any alarm  
Detects and annunciates upon occurrence of branch or  
panelboard main breaker alarm  
Panelboard Summary Alarm  
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Operation  
5.2  
Communication  
5.2.1 LDM Setup Port Connection  
Use the LDM Setup port to download and use the software from Liebert’s Web site for monitoring,  
configuration and firmware upgrades (see 5.3 - Downloading the Software). This port is not a ter-  
minal interface.  
To connect to the LDM Setup port:  
• Connect one end of a standard DB9 (female-female) null modem cable to a desktop or laptop com-  
puter (PC).  
• Connect the other end of the cable to the LDM Setup port on the Liebert LDM, as shown below.  
NOTE  
The images above are intended for illustration only. The location of the external port may vary.  
5.2.2 Modbus Connection  
Use the Modbus port for remote communication. The Liebert LDM supports 2- or 4-wire RS-485/422  
connection (customer-installed).  
To connect to the Modbus port:  
• Look for Connector TB1 on the BCB. This is the RS-485 Modbus port.  
• Refer to the following figure for proper connection points.  
Pin 5 = TX+  
Pin 4 = TX-  
Pin 3 = TX+/RX+  
Pin 2 = RX-/TX-  
Triangle  
indicates  
Pin 1  
Pin 1 = Shield  
NOTE  
The triangle printed on the circuit board depicts Pin 1.  
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Operation  
5.3  
Downloading the Software  
The Liebert LDM has three software tools for monitoring, configuration and firmware updates:  
• Monitoring - see 5.4 - Using the Monitor Tool  
• Configuration - see 5.5 - Using the Configuration Tool  
• Firmware updates - see 5.6 - Upgrading the Firmware  
These programs may be downloaded at no charge or license fee at Liebert’s Web site at:  
NOTE  
The software may be updated and changed without any notification. Check the Web site  
regularly to ensure the software is up-to-date.  
5.4  
Using the Monitor Tool  
The Monitor tool supports service terminal connections through the LDM Setup port. The tool dis-  
plays the following information:  
• Main input voltage and currents  
• Total power  
• Individual branch circuit breaker currents  
• Event log  
• System clock (date and time)  
• Reset kWh function  
A special registry key may be installed in the PC to enable the auto-zero control option and provide  
access to a more in-depth event log. This diagnostic feature is reserved for use by Liebert Services and  
Emerson Network Power technical personnel.  
5.4.1 Starting the Monitor Tool  
• If needed, download the latest version of the software (see 5.3 - Downloading the Software).  
• Run the executable file Monitor-xx.exe (where xx is the latest version) to start the Monitor tool.  
• In the Connect window, select the appropriate COM port, shown below left. The dialog box lists  
available ports only. If a port is in use, it does not appear in the list.  
• Click Connect.  
• The Monitoring main window, below right, opens after communication is established.  
COM port  
Connect  
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Operation  
5.4.2 Monitor Menu Options  
The Monitor window has a menu bar at the top with a drop-down list of options for each menu.  
Table 7 summarizes the options available in these menus.  
Menu options  
Table 7  
Monitor menu options  
Menu Option  
File Menu  
• Exit  
Function  
Terminates the monitoring session and closes the Monitor program.  
View Menu  
• Event Logs  
Opens the Event Log window, allowing users to view a list of events for Panel A or Panel B or  
system. Events are listed in order of occurrence, starting with the most recent.  
• Breakers  
• Subfeeds  
Dump Menu  
• Readings  
Updates the status of all branch breakers for the selected panel in the Breaker Status area.  
Updates the status of all subfeed breakers for the selected panel in the Breaker Status area.  
Downloads a .csv file with main breaker, branch circuit breaker and subfeed readings. The file  
may be viewed with a spreadsheet program such as Microsoft Excel.  
• Event Log  
Downloads a .csv file with the event log stored on the BCB. The file may be viewed with a  
spreadsheet program such as Microsoft Excel.  
• Configuration Downloads a .txt file with the configuration file stored on the BCB. The file includes scaling data,  
Panelboard A and B configurations, branch circuit values and CT ratio settings.  
Alarms Menu  
Choose one of three options—Raw, Filtered or Latched—to specify how alarms are displayed.  
Note that alarms sent over Modbus are latched independent of changes performed in the Alarms menu.  
• Raw  
The raw alarm state is the instantaneous state of the alarm. It is not filtered and has no  
hysteresis. When Raw is selected, an alarm is active whenever the latest reading exceeds the  
setpoint and is cleared as soon as the reading returns to a level within the setpoint range.  
• Filtered  
• Latched  
• Clear All  
The filtered alarm uses the hysteresis interval to suppress transient alarms. A filtered alarm is  
cleared after the alarm condition remains cleared for longer than the hysteresis interval.  
Latched alarms behave like filtered alarms that get stuck on. A latched alarm stays active until  
the alarm is manually cleared.  
Clears all latched alarms for the selected panel. Any alarm condition that is still active is latched  
again after the hysteresis interval passes.  
Help Menu  
• About  
Displays information about Liebert Distribution Monitoring.  
5.4.3 Panel Status and Real-Time Clock  
The Panel Status area displays:  
• The name of the Liebert LDM in the Unit box.  
• The currently selected panel in the Panel box.  
To choose a different panel, click on the panel name or the A/B button. If the selected panel has  
any active alarms, the panel name appears in white text with a red background.  
The Real-Time Clock displays the time as stored in the Liebert LDM unit. The time will not display  
correctly if the time zone is incorrect in the PC. If the time displayed is incorrect and the problem is  
not caused by a time-zone configuration problem:  
• Click the Set button to force the real-time clock to synchronize with the time set on the PC.  
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Operation  
5.4.4 Main Breaker Status  
The Main Breaker Status area displays RMS current, percent load (PCT), total harmonic distortion  
(THD), crest factor (CF), line-to-line voltage (VLL-RMS), line-to-neutral voltage (VLN-RMS), instan-  
taneous power (Power), VA and power factor (PF) for each input phase. If any phase voltage or cur-  
rent is in alarm, the associated field displays white text with a red background.  
Metered energy usage for the panel  
The metered energy usage for the panel is also displayed in kilowatt hours (kWh), as shown above. To  
clear all metering information, click the Reset All kWh button.  
CAUTION  
main breaker as well as all branch breakers and subfeed breakers on the panel.  
!
Exercise care before using the Reset All kWh button, which resets the kWh usage for the  
5.4.5 Breaker Status  
The Breaker Status area displays detailed status for every branch or subfeed breaker on the selected  
panel. The information may appear in a table or as icons, depending on the whether the Table or  
Icons button is active (see 5.4.6 - Mode Buttons).  
The example below shows the table format with details for each breaker: type and rating, percent  
load, individual phase current in amps (I1, I2, I3), power, apparent power (VA), power factor (PF) and  
accumulated kilowatt hours (kWh.)  
5.4.6 Mode Buttons  
Mode buttons at the bottom of the Monitor window allow users to download Monitor readings to a file,  
toggle the display between branch and subfeed breakers, toggle between table and icon views of  
breaker status data and view the Event Log. Additionally, Emerson Network Power technical person-  
nel may control the auto-zero function if the diagnostic registry key is installed.  
Subfeeds/Breakers  
button  
Icons/Table  
button  
Table 8 Monitor mode buttons  
Button  
Function  
Dump  
Converts the Monitor readings into a spreadsheet format (.csv file format).  
Toggles between the subfeed and branch breaker displays. The button label changes  
when the display is changed.  
Subfeeds/Breakers  
Toggles between the tabular and icon views. The button label changes when the display is  
changed.  
Icons/Table  
Events  
Displays the Event Log dialog box.  
Auto-Zero  
(not shown above)  
Viewable only if the diagnostic registry key has been installed on the PC. Used by Emerson  
Network Power technical personnel for diagnostic purposes only.  
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Operation  
5.5  
Using the Configuration Tool  
The Configuration tool allows users to set up breakers and view or change their parameters and  
alarm setpoints.  
NOTE  
End users are unable to create a configuration file. Only Emerson Network Power technical  
personnel can create a unique configuration file. Please contact your local Emerson Network  
Power representative or call Liebert Services at 1-800-LIEBERT (1-800-543-2378) for  
assistance.  
5.5.1 Starting the Configuration Program  
Before starting the Configuration tool, make sure you have the most recent version of the software  
and decide whether you want to connect to the Liebert LDM or work in offline mode.  
Offline mode allows you to run the configuration tool without being connected to the equipment.  
(Prior to Version 25—LDM-Config-25—a service terminal connection was required to configure or  
monitor the Liebert LDM.)  
NOTE  
A configuration file is required for Offline Mode. If one is not available, connect to the  
equipment locally and save the configuration to disk. See 5.5.4 - Install Configuration  
To Connect via COM Port  
To Work in Offline Mode  
1. If needed, download the latest version of the  
1. If needed, download the latest  
version of the software (see 5.3 -  
2. Connect a PC to the Liebert LDM via the external  
DB9 connection. Refer to 5.2.1 - LDM Setup  
2. Run the file LDM-Config-xx.exe  
(where xx is the version number) to  
start the Configuration program.  
3. Run the file LDM-Config-xx.exe (where xx is  
the version number) to start the Configuration  
program.  
4. In the Connect window, select the appropriate  
COM port from the list of available ports.  
3. In the Connect window, click the  
Work Offline button, shown below.  
4. When prompted for the  
configuration file, navigate to the  
location of the file.  
5. Click Connect.  
5. Click Open.  
COM port  
Work Offline  
Proceed to 5.5.2 - Main Configuration Window Overview to begin configuration.  
When a local connection to the Liebert LDM can be performed, load the configuration using the  
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Operation  
5.5.2 Main Configuration Window Overview  
The Configuration window shows breakers graphically in the left pane and associated breaker data at  
right. Selecting a breaker in the left pane changes the display of data in the right pane.  
Select Panel  
Select View  
Unit  
Properties  
Panel  
Properties  
Breaker  
Properties  
Mode  
buttons  
Table 9 shows the main sections of the window, along with a description and a reference to step-by-  
step instructions for each.  
Table 9  
Overview of main Configuration window  
Function  
Toggles the display between Panel A and Panel B. 5.5.6 - Select Panel to View  
Section  
For details, see:  
Select Panel  
Select View  
Toggles between Panel and Auxiliary Breakers.  
Displays the name, DIP switch address and  
software address of the Liebert LDM unit.  
Unit Properties  
Displays the name of the selected panelboard; also 5.5.9 - Edit the Panel Properties or  
Panel Properties  
password setup for security purposes.  
Breaker Properties Displays breaker parameters and alarm setpoints.  
Configuration Mode Buttons  
Uploads a saved configuration file from the PC to  
the Liebert LDM.  
This feature may be used to install a backup copy  
of a configuration file or set up a new Liebert LDM  
installation.  
• Load from File  
• Install to Unit  
Uploads the current configuration from the PC to  
the Liebert LDM after making changes to the  
configuration.  
This step is required to update the unit with the  
latest changes.  
Saves a copy of the configuration file to the PC.  
This feature is useful when a backup copy of the  
configuration file is needed.  
• Save to File  
• Exit Now  
Closes the Configuration program.  
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Operation  
5.5.3 Load a Configuration File from Disk  
A previously saved configuration file—created  
by Emerson Network Power technical person-  
nel or saved from a Liebert LDM unit—may  
be transferred from a PC to the Liebert LDM.  
This feature allows for quick setup based on  
another unit’s configuration or replacing a  
configuration file in an existing installation.  
To upload the configuration file:  
• Click on the Load from File button at  
the bottom of the Configuration window.  
• In the Open window, navigate to the con-  
figuration file, then click Open.  
After a short delay, a confirmation message  
appears. The Liebert LDM is now updated  
with all breaker and subfeed data from the  
configuration file that was just loaded.  
Load from File  
5.5.4 Install Configuration Changes in the Unit  
Whenever configuration changes are made using the Configuration program, the changes must be  
installed in the Liebert LDM using this step.  
To install changes in the unit:  
• Click on the Install to Unit button at the bottom  
of the Configuration window.  
• During the upload, the circuit board will reboot.  
Install to Unit  
Once the rebooting process is complete, the configuration is now active.  
NOTE  
Always perform this step after making changes to the configuration. Configuration changes are  
not stored in the Liebert LDM until the Install to Unit button is clicked.  
5.5.5 Save the Configuration File to Disk  
Saving the configuration file creates a copy of  
the current configuration, ensuring a backup  
is available in the event of file corruption or  
some other problem.  
• Click on the Save to File button at the  
bottom of the Configuration window.  
• In the Save As window:  
• Specify the location where you want  
to save the file in the Save In box.  
• Enter a unique name in the File  
Name box.  
• Click Save.  
Save to File  
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Operation  
5.5.6 Select Panel to View  
Up to two panelboards may be connected to the Liebert LDM (see 4.1.1 - Connecting Panelboards  
A and B). Each may be viewed in the Configuration main window.  
To switch the view to a different panel:  
• In the Select Panel box, click on Panel A for Panelboard A or Panel B for Panelboard B. The  
panel name appears in the Panel Name box, as in the following examples.  
Select View  
Select Panel  
Panel Breakers view  
Auxiliary Breakers view  
5.5.7 Select Breakers to View  
For each panelboard, two types of breakers may be configured.  
To switch the view, click on a button in the Select View box (shown above):  
Panel Breakers to view circuit breakers installed in the panelboard (see example above left).  
Auxiliary Breakers to view breakers installed outside the panelboard—for example, subfeed  
breakers (see example above right).  
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Operation  
5.5.8 Edit the Liebert LDM Unit Properties  
Unit  
Properties  
Panel  
Properties  
The Unit properties box displays the name,  
DIP switch address and software address of  
the Liebert LDM unit:  
LDM Unit Name - a name assigned to  
the Liebert LDM unit.  
To make a change, click in the LDM  
Unit Name box, click Edit and enter a  
name, then click Apply.  
DIP Switch Address - the Modbus  
address determined by the Modbus  
address DIP switch setting.  
The address can be changed by reset-  
ting DIP switches on S2 on the BCB.  
Software Address - a software-config-  
ured address that overrides the DIP  
Switch Address if the DIP switch  
address is set to zero.  
To make a change, click in the Software  
Address box, click Edit and enter a  
value, then click Apply.  
Install to Unit  
(click to save changes  
to Liebert LDM)  
• When finished, click Install to Unit to  
upload the changes to the Liebert  
LDM.  
NOTE  
The configuration changes will not be stored in the Liebert LDM until the Install to Unit  
button is clicked.  
5.5.9 Edit the Panel Properties or Set a Password  
The Panel properties box displays the name of the selected panelboard, as well as a Password box for  
creating a password to protect against unwarranted changes to the configuration:  
Panel Name - the default panelboard names are PANEL A and PANEL B.  
To change a name, click in the Panel Name box, click Edit and enter a name, then click Apply.  
Password - a password required for users to make changes to the configuration file.  
To create a password:  
• Click in the Password box, click Edit and enter a password.  
The password may be up 10 characters long and may consist of any combination of numbers,  
letters and special characters. The password is not case-sensitive.  
• Click Apply.  
• When finished, click Install to Unit to upload the changes to the Liebert LDM.  
NOTE  
The configuration changes will not be stored in the Liebert LDM until the Install to Unit  
button is clicked.  
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Operation  
5.5.10 Edit the Breaker Properties  
The Breaker Properties box displays the breaker name, rating, other parameters and alarm setpoints.  
Select a  
Breaker  
Breaker  
Properties  
Edit and  
Apply  
Install to Unit  
buttons  
(click to save  
changes to  
Liebert LDM)  
To view or change parameters and alarm setpoints of a breaker:  
• Click on the breaker in the left pane. When selected, the breaker has a yellow outline.  
• Refer to the following table to make changes.  
Parameter  
Breaker  
Name  
Description  
To make a change:  
The name of the selected breaker. The default  
names are BREAKER #01, BREAKER #02, etc.  
• Click in the Breaker Name box, click Edit and  
enter a name, then click Apply.  
The location of the selected breaker on the  
panelboard.  
Position  
(Cannot be edited)  
(Cannot be edited)  
Number  
of Poles  
The number of poles selected when the breaker was  
added to the panelboard.  
Breaker  
Rating  
The amperage for which the circuit breaker is rated.  
The default is 20A.  
• Click in the Breaker Rating box, click Edit and  
enter a value, then click Apply.  
Phase  
Overcurrent  
Alarm  
Percentage of the breaker rating that triggers an  
overcurrent alarm. This value must be higher than  
the Phase Overcurrent Warning.  
• Click in the Phase Overcurrent Alarm box,  
click Edit and enter a value, then click Apply.  
Phase  
Overcurrent  
Warning  
Percentage of the breaker rating that triggers an  
overcurrent warning. This value must be lower than  
the Phase Overcurrent Warning.  
• Click in the Phase Overcurrent Warning box,  
click Edit and enter a value, then click Apply.  
Percentage of the breaker rating that triggers an  
undercurrent alarm. The default is 0 (zero). Indicates  
no current is flowing through the breaker—either the  
breaker has tripped or the equipment has shut down.  
Phase  
Undercurrent  
Alarm  
• Click in the Phase Undercurrent box, click Edit  
and enter a value, then click Apply.  
Neutral Current  
Alarm  
Percentage of the breaker that triggers a neutral  
current alarm.  
• Click in the Neutral Current Alarm box, click  
Edit and enter a value, then click Apply.  
Ground Current  
Alarm  
• Click in the Ground Current Alarm box, click  
Amperage that triggers a ground current alarm.  
Edit and enter a value, then click Apply.  
• When finished, click Install to Unit to upload the changes to the Liebert LDM.  
NOTE  
The configuration changes will not be stored in the Liebert LDM until the Install to Unit  
button is clicked.  
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Operation  
5.5.11 Add or Delete a Circuit Breaker  
After moving or removing circuit breakers in the panelboard, use the Configuration tool to add or  
delete in the configuration.  
Run the configuration program using the steps outlined in 5.5.1 - Starting the Configuration Pro-  
gram. Once connected, the configuration file that is currently programmed will be displayed.  
5.5.12 Adding a Circuit Breaker  
NOTE  
Check to make sure the location for the new breaker does NOT have a breaker assigned. If it  
does, first remove that breaker (see 5.5.14 - Delete a Breaker), then return to this procedure.  
An error message appears if you attempt to add a breaker to an assigned position.  
• If NOT assigned, a breaker position is shown with a Liebert logo.  
• An assigned breaker position appears as a picture of a circuit breaker.  
To add a 1-, 2- or 3-pole circuit breaker:  
• Run the Configuration program (see 5.5.1 - Starting the Configuration Program).  
• If needed, select the panel and breaker view with the new breaker:  
• In the Select Panel box, click on Panel A or Panel B.  
• In the Select View box, choose Panel Breakers if the new breaker is installed inside the pan-  
elboard or Auxiliary Breakers if located outside the panelboard.  
Add  
Breaker  
Assigned  
breaker  
positions  
Unassigned  
breaker  
positions  
• Right-click on the new breaker position in the left pane. The selected breaker has a yellow outline.  
• In the pop-up menu, click on Add Breaker, then on the type of breaker that was installed: One-  
Pole, Two-Pole or Three-Pole.  
• In the Breaker Properties at right, change the breaker’s name, parameters and alarm setpoints as  
• When finished, click Install to Unit to upload the changes to the Liebert LDM.  
NOTE  
The configuration changes will not be stored in the Liebert LDM until the Install to Unit  
button is clicked.  
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Operation  
5.5.13 Adding a Subfeed Breaker  
NOTE  
Check to make sure the location for the new breaker does NOT have a breaker assigned. If it  
does, first remove that breaker (see 5.5.14 - Delete a Breaker), then return to this procedure.  
An error message appears if you attempt to add a breaker to an already assigned position.  
• If NOT assigned, a subfeed breaker position is shown with three Liebert logos.  
• An assigned subfeed breaker position appears as a picture of a 3-pole breaker.  
To add a 3-pole subfeed breaker circuit:  
• Run the Configuration program (see 5.5.1 - Starting the Configuration Program).  
• If needed, select the panel and breaker view with the new breaker:  
• In the Select Panel box, click on Panel A or Panel B.  
• In the Select View box, choose Panel Breakers if the new breaker is installed inside the pan-  
elboard or Auxiliary Breakers if located outside the panelboard.  
Panel Breaker View  
Auxiliary Breaker View  
Add  
Subfeed  
Assigned  
breaker  
positions  
Unassigned  
breaker  
positions  
• Right-click on the new breaker position in the left pane. The selected breaker has a yellow outline.  
• In the pop-up menu, click on Add Subfeed.  
• In the Add Subfeed window:  
• Click on the subfeed—for example, Subfeed #1 or  
Subfeed #2—in the Select Subfeed box.  
NOTE  
The number of available subfeeds is determined by the  
interface board selected and whether cross-configuration  
is enabled.  
• In the Select Size box, choose the rating of the new breaker: 100 Amp, 225 Amp or 400 Amp.  
• Click on the Add Subfeed button to return to the main Configuration window.  
• In the Breaker Properties box of the Configuration window, change the subfeed breaker’s name,  
parameters and alarm setpoints as needed (see 5.5.10 - Edit the Breaker Properties).  
• When finished, click Install to Unit to upload the changes to the Liebert LDM.  
NOTE  
The configuration changes will not be stored in the Liebert LDM until the Install to Unit  
button is clicked.  
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Operation  
5.5.14 Delete a Breaker  
Removing a breaker from the configuration is required after moving or removing circuit breakers in  
the panelboard. This step must be performed before adding a breaker in the same position.  
To delete a breaker:  
• Run the Configuration program (see 5.5.1 - Starting the Configuration Program).  
• If needed, select the panel and breaker view with the breaker to be deleted:  
• In the Select Panel box, click on Panel A or Panel B.  
• In the Select View box, choose Panel Breakers if the breaker is installed inside the panel-  
board or Auxiliary Breakers if located outside the panelboard.  
• Right-click on the breaker position in the left pane. The selected breaker has a yellow outline.  
• In the pop-up menu, click Delete.  
• A confirmation message appears, as shown above. Select Yes to delete the breaker (or No to can-  
cel).  
• Repeat as needed to delete other breakers.  
• When finished, click Install to Unit to upload the changes to the Liebert LDM.  
NOTE  
The configuration changes will not be stored in the Liebert LDM until the Install to Unit  
button is clicked.  
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Operation  
5.6  
Upgrading the Firmware  
The Flash program is used to upgrade the firmware on a Liebert LDM unit. It uses the service termi-  
nal port to erase the old firmware, copy the new firmware and reboot the unit.  
NOTE  
Updating the firmware will not erase any configuration settings currently installed. No notice  
is given to customers when a new firmware version becomes available. Check Liebert’s Web site  
periodically for any available updates (see 5.3 - Downloading the Software).  
To upgrade the firmware:  
1. Make sure the Liebert LDM unit is powered ON.  
2. Connect the PC to the Liebert LDM via the external DB9 connection. Refer to 5.2.1 - LDM Setup  
3. If needed, download the latest version of the software (see 5.3 - Downloading the Software).  
4. Run the file named Flash x.x.x.exe (where x.x.x is the version number).  
5. In the Upgrade Firmware window, click the Select Port button.  
6. In the Scan for LDM Units window:  
• Select the COM port from the drop-down list—for example, COM1.  
• Make sure the Baud Rate is 115200.  
• Click the Start Scan button to check for a connection to the unit.  
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Operation  
7. If the Liebert LDM unit is detected, a confirmation window appears. Click Yes to continue and  
proceed to Step 8.  
If the Liebert LDM unit is NOT detected, an error message appears. Click OK to return to the  
Upgrade Firmware window. Check to verify the following, then repeat Step 6:  
• The correct COM Port is selected and the Baud Rate is 115200.  
• A serial cable is properly connected to the unit (see 5.2.1 - LDM Setup Port Connection).  
• The Liebert LDM unit is powered ON.  
8. In the Open window, locate the firmware file named MAIN-xx.out (where xx is the current  
version):  
• Browse to the folder where the Flash files are located—the default folder is Flash.  
• Select the file you want to download—MAIN-xx.out (where xx is the current version).  
• Click the Open button.  
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Operation  
9. The Upgrade Firmware window appears. Click the Download button to continue.  
10. Wait for the firmware upgrade to complete.  
• The program erases the old image, than writes the new image, as shown below.  
Progress  
Progress  
Failed = 0  
11. When the new image is loaded, the Flash program restarts the unit. Verify the following:  
• In the Summary Status box, the Number of Units should be 0 under Failed.  
• In the Detail Status box, Running should appear under Progress—this indicates that the  
BCB has been restarted successfully.  
12. Click Exit to close the Flash program.  
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Specifications  
6.0 SPECIFICATIONS  
ELECTRICAL  
Voltage  
120 - 240 VAC (-13% to +6%)  
50 and 60Hz  
Frequency  
Control Transformers Rating  
(Secondary Winding)  
1A for Branch Circuits and Subfeeds  
5A for Main Input Breaker  
BSM Current  
0.25A to 50A  
2% for 1A to 50A  
5% for 0.25A to 1A  
CT Accuracy  
Minimum Current  
200mA  
ENVIRONMENTAL  
Humidity  
0-95%  
Temperature (Non-Operating)  
Temperature (Operating)  
-68°F to 158°F (-20°C to 70°C)  
32°F to 104°F (0°C to 40°C)  
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Troubleshooting / FAQs  
7.0 TROUBLESHOOTING / FAQS  
1. How do I obtain the software necessary to monitor and configure the Liebert LDM?  
• The software package is available from Liebert’s Web site:  
2. What is contained in the downloaded software package?  
• The downloaded file from Liebert’s Web site is a zip file that contains:  
• the flash program with a walk-through instruction  
• the configuration program  
• the monitor program  
• the latest firmware file (to update the Liebert LDM firmware using the flash program)  
3. What should I do if the BMS is reporting an overcurrent alarm?  
• Verify the circuit is not actually overloaded.  
• Using the Configuration program, verify alarm setpoints and CT ratio is correct.  
• If settings are correct, verify that the BMS is operating correctly.  
• If the issue still exists, contact Liebert Services at 1-800-LIEBERT (1-800-543-2378) for assis-  
tance.  
4. I get an error message “Incorrect Schema Version” when I try to run the Monitor tool or  
Configuration tool. What should I do?  
• Ensure that only one program—either Monitor or Configuration—is running at a time. You  
can’t run both programs at the same time.  
• Ensure the latest firmware is loaded into the BCB. Please visit Liebert’s Web site for firm-  
ware updates. If a firmware upgrade is necessary, refer to 5.6 - Upgrading the Firmware.  
• Verify the PC is connected to the LDM Setup port and the cable is fully seated (see 5.2.1 -  
• Verify the Liebert LDM unit has power (green LEDs on the BCB will be flashing).  
5. How can I make a backup copy of the configuration file?  
• Connect to the external LDM Setup port (see 5.2.1 - LDM Setup Port Connection).  
• Run the configuration program (see 5.5.1 - Starting the Configuration Program).  
• At the bottom of the Configuration window, select Save to File. Navigate to a location on  
your PC to store the file (see 5.5.5 - Save the Configuration File to Disk).  
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Ensuring The High Availability  
0f Mission-Critical Data And Applications.  
Technical Support / Service  
Web Site  
Emerson Network Power, the global leader in enabling business-critical  
continuity, ensures network resiliency and adaptability through  
a family of technologies—including Liebert power and cooling  
technologies—that protect and support business-critical systems.  
Liebert solutions employ an adaptive architecture that responds  
to changes in criticality, density and capacity. Enterprises benefit  
from greater IT system availability, operational flexibility and  
reduced capital equipment and operating costs.  
Monitoring  
800-222-5877  
Outside the US: 614-841-6755  
Single-Phase UPS  
800-222-5877  
Outside the US: 614-841-6755  
Three-Phase UPS  
800-543-2378  
Environmental Systems  
800-543-2778  
Outside the United States  
614-888-0246  
Locations  
United States  
1050 Dearborn Drive  
P.O. Box 29186  
Columbus, OH 43229  
Europe  
Via Leonardo Da Vinci 8  
Zona Industriale Tognana  
35028 Piove Di Sacco (PD) Italy  
+39 049 9719 111  
Fax: +39 049 5841 257  
Asia  
7/F, Dah Sing Financial Centre  
108 Gloucester Road, Wanchai  
Hong Kong  
While every precaution has been taken to ensure the accuracy  
and completeness of this literature, Liebert Corporation assumes no  
responsibility and disclaims all liability for damages resulting from use of  
this information or for any errors or omissions.  
© 2008 Liebert Corporation  
All rights reserved throughout the world. Specifications subject to change  
without notice.  
852 2572220  
Fax: 852 28029250  
® Liebert is a registered trademark of Liebert Corporation.  
All names referred to are trademarks  
or registered trademarks of their respective owners.  
SL-20420_REV0_03-08  
Emerson Network Power.  
EmersonNetworkPower.com  
The global leader in enabling Business-Critical Continuity.  
AC Power  
Connectivity  
DC Power  
Embedded Computing  
Embedded Power  
Monitoring  
Outside Plant  
Racks & Integrated Cabinets  
Power Switching & Controls  
Precision Cooling  
Services  
Surge Protection  
Business-Critical Continuity, Emerson Network Power and the Emerson Network Power logo are trademarks and service marks of Emerson Electric Co.  
©2008 Emerson Electric Co.  
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