CANdrive™Module
Installation and Operations Manual
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Section 78
Table of Contents
General Information................................................................................................................ 1
Introduction ..................................................................................................................1
Installation Instructions.......................................................................................................... 2
Configuration................................................................................................................2
Electrical Connection ...................................................................................................3
Panel Mounting ............................................................................................................5
Operation and Maintenance................................................................................................... 6
Gage Driver Outputs ....................................................................................................6
Indicating LEDs............................................................................................................6
Maintenance.................................................................................................................7
Specifications.......................................................................................................................... 8
Power Supply...............................................................................................................8
Inputs ...........................................................................................................................8
Outputs.........................................................................................................................8
General ........................................................................................................................8
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General Information
Introduction
As part of the MurphyLink® family, the Murphy CANdrive™ offers a cost effective instrument
solution for modern electronic engines. CANdrive acts as an interface between ECU
CANbus/J1939 transmitted data and standard electric indicating gages. CANdrive and electric
gages are an alternative solution to retrofitting of engine senders, magnetic pickups and
associated wiring.
CANdrive has dedicated outputs for a tachometer, oil pressure, and coolant temperature
electric gages. User configurable links allow for selectivity between 12 or 24 VDC systems,
and for all gage outputs to be selected for Murphy, VDO, or Datcon.
CANdrive is packaged in a compact, surface mounted case with epoxy encapsulation for
maximum durability and environmental sealing. Electrical connection is via a 12-way
automotive-type connector.
Standard Model Options
Stock Code
78-70-0363
Model / Description
CDV100F, CAN drive J1939 to electric gage interface. 1 x CAN
status LED, connector forward
78-70-0364
78-00-0437
CDV300R, CANdrive J1939 to electric gage interface. 8 x
status/fault LEDs, connector rearward. Model CDVG sealing
gasket included.
CDV-PW-30, CANdrive power and CAN harness. Length: 30 in.
(0.762m). Included with CDV100F and CDV300R
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Installation Instructions
Configuration
CANdrive modules are supplied with 5 circuit board links soldered in place. These wire links,
labeled L1 through L5, are located on the back side of the unit.
The links allow configuration of operating options by snipping the appropriate wire according to
the following configuration table.
WARNING: The configuration links are one-time breakable and are
not replaceable. Care must therefore be taken to select the
correct options before cutting links.
Configuration Table
Link
L1
L2
Function
CANbus 120 Ohm resistor
DC supply voltage
Link Options
Cut L1 to remove 120 Ohm terminating resistor.
Leave L2 intact for 12V operation
Cut L2 for 24V operation
L3
L4
Gage output options
Leave L3 and L4 intact for Murphy gages (see
compatibility table)
Cut L3 only for Datcon gages (see compatibility table)
Cut L4 only for VDO gages (see compatibility table)
Leave L5 intact for 0-7 bar gages
Cut L5 for 0-10 bar gages
L5
VDO pressure gage range
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Gage Compatibility Tables
Electrical Connection
CANdrive modules electrical connection is through a 12-way automotive type receptacle
shown right. CANdrive models are available with the connector facing forward through the front
label (‘F’ option, e.g. model CDV100F), or rearward through the epoxy encapsulation (‘R’
option, model CDV300R).
CANdrive electrical connection is through a 12-way automotive type receptacle. A 30-inch
connector harness is included with each CANdrive model, and has each wire individually
labeled for ease of installation.
Typical Connection
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Terminal Functions
PIN
1
Function
Negative DC, power supply
2
Positive DC, power supply
3
Negative DC, gage common return
CANdrive modules are supplied for use with 12V (7 to 16V) DC operation. If 24V
(19 to 30V) DC operation is required, remove (cut) rear link L2.
Connect a 1 Amp anti-surge fuse in the positive DC line (pin 2).
Oil pressure gage output
4
6
Coolant temperature gage output
Pins 4 and 6 give a variable current output for driving oil pressure and coolant
temperature electric gages. The current versus pressure/temperature curve is
specific to each gage type, and must be selected by cutting appropriate links L3, L4
and L5 - see Configuration section above.
7
Tachometer output
Pin 7 gives a square wave output (0V to battery positive DC), with a frequency that
is proportional to engine speed. At 1500 RPM engine speed, the output is
approximately 121 Hz, suitable for driving charge alternator based tachometers
such as the Murphy AT(H)A series. Pin 7 gives no output below 100 RPM engine
speed.
Connect each output to the appropriate gage/ tachometer signal input.
Gage/tachometer negative terminals should be common to battery negative, ideally
via dedicated wiring to terminal 3. (The use of dedicated return wiring to pin 3
rather than a ground return will minimize gage inaccuracies caused by ground
noise.)
5
8
CAN Hi
CAN Lo
Connect these terminals to the engine CANbus, taking care to observe the correct
polarity. The CANbus cable screen/shield is typically connected to ground at the
ECU end: refer to the engine manufacturer’s installation guidelines.
CANdrive modules are supplied with a 120 Ohm network terminating resistor fitted
in-circuit between CAN Hi and CAN Lo. If CANdrive module is not positioned at the
end of the CANbus network, remove the resistor by snipping out rear link L1.
Reserved for future use
9
10
11
12
Factory use
Factory use
Factory use
NOTE: Connection Pins 9, 10, 11, and 12 are reserved for future use, or
are used in the factory setup of CANdrive modules. Do not connect wiring
or equipment to these terminals. Connection can result in permanent
damage to CANdrive modules.
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Panel Mounting
WARNING: Do not install the CANdrive module near exhaust
manifolds, turbochargers or other engine locations that might
exceed the maximum allowable operating temperature of 185°F
(85°C).
CANdrive modules are surface-mounted with four no.4 screws, fixing center dimensions as
shown. Select screw length according to panel thickness, ensuring a maximum of 1/2 inch
(13mm) screw depth into the CANdrive module fixing holes.
Model CDV100F, with forward facing connector, is designed for surface-mounting inside an
enclosed panel.
Model CDV300F, with additional LEDs and rearward facing connector, is designed for front-of-
panel mounting: these modules require an additional 2.4” x 1.6” (60 x 40mm) cut-out for rear
access to connector and links. The CDV300F includes a CDVG gasket (fitted into a well
behind the rim of the case) to provide front environmental sealing to IP65.
Before mounting, ensure that the final position allows access for:
• Connection of the included wire harness.
• Configuration of links L1 to L5 (position as shown). Alternatively, ensure that the links
are set correctly before mounting. See Configuration section below for full details.
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Operation and Maintenance
Gage Driver Outputs
Gage outputs operate when CANdrive module reads valid J1939 data for engine speed, oil
pressure and coolant temperature. If CANdrive module stops receiving valid data, the gage
outputs are maintained at the last known value for approximately five seconds, after which time
the outputs are turned off.
Indicating LEDs
All standard models have a green CAN status LED. A flashing CAN status LED indicates that
CANdrive module is powered, but is not receiving any J1939 data. A constantly lit CAN status
LED indicates a good CANbus connection and J1939 activity. (Note: J1939 activity can
originate from ANY device on the CANbus network, and may not be valid data from the engine
ECU.)
Model CDV300R has additional LEDs for indication of engine faults, as transmitted from the
ECU. CANdrive modules respond to single DM1 (active fault code) messages that contain a
Suspect Parameter Number (SPN), Fault Mode Indicator (FMI) and warning/stop lamp data.
CANdrive modules also read multi-packet transport messages broadcast using the broadcast
address message (BAM) protocol.
LEDs typically light continuously to indicate a shutdown fault, and flash to indicate a (non-
shutdown) warning fault.
CANdrive modules can handle up to 8 simultaneous faults at one time; additional fault
messages are not registered. When a fault becomes inactive and is no longer broadcast, the
appropriate LED goes out after approximately two seconds.
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Maintenance
CANdrive modules have no user-serviceable parts. Maintenance is therefore limited to the
following preventative checks:
• Check that electrical connections are secure.
• Check that the CANdrive module is securely mounted and kept free from
exposure to water or build up of excessive dust/dirt. The front label and casing
may be wiped with a clean, damp cloth. Do not use cleaning solvents.
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Specifications
Power Supply
• Operating voltage:
• 12V range (link L2-in place) 7-16 VDC
• 24V range (link L2-cut) 19-30 VDC
• Current consumption:
• CDV100F: 25mA typical
• CDV300R: 50mA, typical (2 LEDs lit)
Inputs
• CANbus:
• SAE J1939 protocol, Input fitted with 120 Ohm terminating resistor, removable by cutting link L1.
Outputs
• Oil pressure gage, coolant temperature gage
• Link selectable for Murphy, VDO or Datcon electric gages
• Tachometer
• Pulsed DC, approximately 121 Hz @ 1500 RPM
General
• Overall dimensions (W x H x D)
• Case: 2.7x3.8x0.9 inch (68x96x22mm) (allow 2 inches (50mm) depth with connector)
• Weight: approximately .18 lbs (80g)
• Environmental sealing
• IP60
• CDV300R: IP65 from front with CDVG gasket (included)
• Operating ambient temperature: -40° F to 185° F (-40°C to +85°C)
• Storage temperature: -67°F to 221°F (-55°C to 105°C)
• Operating Vibration: .02 lbs (10g) (5-2000 Hz)
• Operating Shock: .11 lbs (50g) (3-axis)
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MURPHY, the Murphy logo, and CANdrive are registered and/or common law trademarks of Murphy Industries,
Inc. This document, including textual matter and illustrations, is copyright protected by Murphy Industries, Inc.,
with all rights reserved. (c) 2007 Murphy Industries, Inc. Other third party product or trade names referenced
herein are the property of their respective owners and are used for identification purposes only.
Section 78
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