MGC-96079B
Revised 08-02
Catalog Section 75
(00-02-0766)
Digital Generator Panels
FWMurphy
MGC447 and MGC547 Series
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Microprocessor-Based Controller
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Digital Engine and Generator Display
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Pre-Programmed, Full Featured
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Built-In Advanced Communications
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MGC547
Compact Design, NEMA 1 Drip Proof
Operating Temperature: -4 to 149°F (-20 to 65°C).
Storage Temperature: -4 to 149°F (-20 to 65°C).
Relative Humidity: 95%RH @ 60°C (140°F).
Description
Features
•
Pre-programmed generator panels for typical
gen-set operations: warm-up, transfer to
load, run time, engine unload, cooldown.
The MGC447 and MGC547 generator panels
provide inexpensive engine and generator
monitoring and control with digital accuracy.
These microprocessor-based controllers
include all basic industry requirements plus
many value added features such as: remote
communications and control capabilities; on-
board real time clock; shutdown history dis-
play of last 5 shutdowns; service reminders.
Communications:
MGC447: 1-RS485 serial port.
MGC547: 2-RS485 and 2-RS232 serial ports.
•
•
For 3-phase, 4-wire or 1-phase, 3-wire generators.
Digital readout of all engine and generator
functions: pressure, temperature, rpm, amps
and volts. Monitored with first-out shutdown
annunciation.
Digital Inputs: 3 optically-isolated, (positive voltage
or ground) such as from Murphy SWICHGAGE®s.
Input 1: Auto position on toggle switch
*
Input 2: Test position on toggle switch
*
•
Built-in communication for remote start/stop
and monitoring engine and generator func-
tions (MGC547 models).
Input 3: Spare 1 Input
Operating parameters are configured through
a three-button interface. Data is displayed on a
32-character, back lit alphanumeric liquid
crystal display. Access to the system memory
is controlled by entry codes, and the program
is stored in EPROM.
Analog Inputs: 7
Analog 1: Water Temperature Sender
Analog 2: Engine Oil Pressure Sender
Analog 3: Low Coolant Input (closed on fault)
Analog 4: Oil Level Input (closed on fault)
•
•
•
Optically-isolated noise resistant inputs.
Open collector transistor outputs.
Crank and Rest cycle timers, 1 to 300 seconds
each (adjustable).
Analog 5: AC Volts (0-5 VDC)
*
These panels accept a variety of sensor inputs
such as from Murphy electric gage type resis-
tive sending units and digital inputs such as
from SWICHGAGE® instruments.
Analog 6: AC Amps (0-5 VDC)
*
•
•
Shutdown time delay, 2 to 2000 seconds
(adjustable), locks out low oil pressure
and high temperature on start-up.
Analog 7: Remote Start/Stop
Frequency Input: 1 optically-isolated for speed
reference from magnetic sensor (pickup).
Crank disconnect and overspeed sensing
operates from a magnetic pickup signal
(requires 2 Vrms minimum) or alternator
tachometer terminal.
The MGC447 and MGC547 feature open col-
lector transistor type and relay type outputs.
Outputs: 7
Output 1: Fuel Solenoid
Output 2: Starter
Output 3: Common Fail
†
†
These compact panels measure only 13-1/4 x
8-1/2 x 12-1/2 inches (337 x 216 x 318 mm), and
are shock mounted and rated NEMA 1 drip-proof.
†
Important: Off-panel items such as senders, mag-
netic sensors and CT’s must be ordered separately.
Output 4: Glow Plug**
Output 5: Generator Regulator Control**
The MGC547 Series models incorporate built-
in serial ports for advanced communication
capabilities. They can communicate with
remote terminals, such as a computer via
modem or can automatically dial your pager to
inform you of the status of the generator.
Output 6: Phase 2 Selection
*
Specifications
NOTE: These specification apply to all models
unless otherwise indicated.
Output 7: Phase 3 Selection
*
NOTE: I/O’s and comm. ports are program specific
and will vary depending upon the software program
used. Custom programming is available.
MGC447 models: EMS447 controller.
MGC547 models: EMS547 controller.
Power Requirements:
*
Internal, not for customer connection.
The user is able to start or stop the engine, view
operating parameters and reset or acknowledge
abnormal conditions from a computer.
** Open collector transistor type, 300 mA maximum.
To drive customer supplied relay.
Auxiliary relay, customer connection is
form “A” relay contact, 12 V, 40 A; 24 V, 16 A.
12 VDC battery for 12 V models.
24 VDC battery for 24 V models.
†
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