Murphy FuelCAN FLC300 Installation Instructions Manual

00-02-0663

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FuelCAN FLC300

revision A, 26

February 2010

section 78

Fuel sender to J1939 CANbus interface

Installation Instructions

Please read the following information before installing. A visual inspection of this product for damage during

shipping is recommended before installation. It is your responsibility to ensure that qualified mechanical and electrical
technicians install this product. If in doubt, please contact your local Murphy representative.

General Information

WARNING

BEFORE BEGINNING INSTALLATION OF THIS PRODUCT

Disconnect all electrical power to the machine
Make sure the machine cannot operate during installation
Follow all safety warnings of the machine manufacturer
Read and follow all installation instructions

FuelCAN is a compact interface for translating an analogue
fuel level sender signal into digital SAE J1939 CANbus data.
The device allows integration of standard fuel level senders
into modern ECU-based engine instrument and control
systems.

FuelCAN modules have three inputs (only one of which is
connected at any one time): input 1 is configured for use with
Murphy ES series resistive fuel level senders; inputs 2 and 3
can be used with fuel level senders having compatible
resistance ranges.

fuel level / approx. resistance, Ohms

empty 1/4 1/2 3/4 full

Input 1 (Murphy)

Input 2

Input 3

FuelCAN inputs can also be factory-configured for use with
non-standard fuel level or resistive senders. Please note
that minimum order quantities apply for custom solutions.

A rear facing LED indicates input and CANbus status.
FuelCAN is compact and light enough to be incorporated
into wiring harnesses, but can also be surface mounted via
four case holes. The polycarbonate case is fully sealed in
epoxy resin for high impact and environmental resistance.

These instructions relate to Murphy part number 79.70.0006.
FuelCAN modules with other stock codes may include
modified input scaling or CANbus/J1939 data parameters.

240 147 96 60 33.5

240 158 100 58 30

10 56 95 138 180

Specifications

Power supply

Operating voltage, steady state: 7 to 35 VDC
Current consumption: 25mA (typ.)

Inputs

Maximum operating range: –2 to +35 VDC
Input 1 sender range, Ohms: 240 (empty) to 33.5 (full)
Input 2 sender range, Ohms: 240 (empty) to 30 (full)
Input 3 sender range, Ohms: 10 (empty) to 180 (full)

Output

CANbus:

SAE J1939 protocol, PGN65276 (00FEFC
120 Ohm terminating resistor fitted.

Physical

Case material: high impact ABS, epoxy filled
Dimensions: see diagram below
Weight: approx 60g / 0.13 lb
Operating temperature: –20 to +85 °C / –4 to +185 °F
Environmental sealing: IP65, exposed lead ends
Electromagnetic compatibility: 2004/108/EC

Connection and Dimensions

(standard FLC300 shown)

), 2 sec update rate.

16

Electrical Connection & Mounting

Electrical Connection

FuelCAN connection is via 8 colour-coded flying leads
(see diagram on page 1).

RED: Power supply positive DC
BLACK: Power supply negative DC

Connect these wires to a smooth DC power supply in the range
7 to 35 VDC. A 1 Amp anti-surge fuse is recommended in the
positive DC line.

FuelCAN operates with negative earth/ground or fully insulated
DC systems. DO NOT use FuelCAN with positive earth/ground
systems.

YELLOW: CANbus high
GREEN: CANbus low

Connect these wires to the engine’s CANbus, using the
appropriate twisted-pair cable to J1939 specification. FuelCAN
includes a non-removable 120 Ohm terminating resistor.

Operation and Maintenance

BLACK: Sender common (negative DC)
VIOLET: Sender input 1 (Murphy)
ORANGE: Sender input 2
WHITE: Sender input 3

For best measurement accuracy, use an insulated return
(2-wire) resistive fuel level sender, e.g. (for

input 1) Murphy
ES2F series. Connect one sender terminal to the appropriate
FuelCAN input lead (1, 2 or 3); connect the other sender
terminal to FuelCAN’s Sender Common (black) wire.

Where a 1-wire (negative DC/ground return) sender is used,
connect the black (sender common) wire to battery negative.

Mounting

FuelCAN uses an epoxy-resin filled, polycarbonate case for high
impact and environmental resistance. The case is compact
and light enough for inclusion in (or tie-wrapping to) an engine
wiring harness; or, using the actual product as a template,
FuelCAN can be surface mounted via four M4 (0.15 in) holes
(see diagram on page 1 for approximate dimensions). The case
is sealed to IP65; the exposed flying leads must use connectors
appropriate for the environmental sealing required.

Operation

At each power up, FuelCAN checks all three inputs for
an in-range sender resistance. If more than one sender is
connected at power-up, FuelCAN prioritises input selection
in the order 1 (Murphy), 2 then 3.

Once FuelCAN has selected a valid input, it continues to
use that input until the DC power supply is cycled. FuelCAN
transmits fuel level data every 2 seconds. Data specification
is otherwise as SAE J1939-71:

PGN 65276 (00FEFC16)

Message data length 8 bytes

Relevant byte #2 (fuel level)

Data page 0

PDU format 254

PDU specific 252

Resolution 0.4%/bit gain, 0% offset

Data range 0 to 100%

If a sender failure (short or open circuit) occurs during
operation, FuelCAN transmits fuel level data of value
0xFE

(indicating ‘measurement error’).

16

If no valid sender is detected at power-up, FuelCAN transmits
a value 0xFF
flashes its LED in a ‘heartbeat’ pattern (two short pulses,
followed by a longer pause). J1939 message PGN65275
also includes bytes for other parameters, including washer
fluid level (byte #1), fuel filter differential pressure (byte #3),

(indicating ‘measurement not available’) and

16

In order to consistently bring you the highest quality, full featured products, we reserve the right to change our specifications and designs at any time.

MURPHY, the Murphy logo, are registered and/or common law trademarks of Murphy Industries, LLC. This document, including

textual matter and illustrations, is copyright protected by Frank W Murphy Ltd., with all rights reserved. © 2010 Frank W Murphy Ltd.

engine oil filter differential pressure (byte #4) and cargo
ambient temperature (bytes #5/6). For each of these
parameters, FuelCAN transmits a value 0xFF

(indicating

16

‘measurement not available’).
LED operation is as follows:-

LED pattern Status

ffo rewoP ffO

Flashing
(‘heartbeat’ pulse on)

Flashing
(50/50% on/off)

Power on, but all inputs open circuit
(valid sender not detected).

Power on, valid sender input, but no
CAN activity.

CAN activity

Maintenance and Warranty

FuelCAN contains no user-serviceable parts. Maintenance is
therefore limited to the following preventative checks:

• Check that FuelCAN electrical connections are secure.

• Check that the case is mounted securely, with vibration

and environmental exposure minimised where possible.
The case may be wiped with a clean, damp cloth. Do not
use cleaning solvents.

FuelCAN is supplied with a two year warranty on parts and
workmanship. In the event of a fault or technical query,
and before returning equipment, please contact your
Murphy representative for technical support.

dna tupni rednes dilav ,no rewoP nO

FW Murphy – FuelCAN FLC300 installation instructions 00-02-0663 revision A 26th February 2010 p2/2