00-02-0665
28th November 2008
catalogue section 78
MeCAN™
Mechanical Engine to CAN J1939 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
Description
Product specification
power supply:
MeCAN™ is a compact, encapsulated interface module that
translates resistive sender, fault switch and speed signals into
SAE J1939 CANbus data. MeCAN allows quick and simple
integration of ‘mechanical’, non-ECU engines into modern
CANbus systems. Applications include the retrofit of older
engine fleets with digital instruments, controls and telemetry,
and the development of standard control panels for both ECU
and non-ECU engines.
MEC300-1
MEC300-2
(79.70.0014)
(79.70.0020)
operating voltage
current consumption
7 to 35 VDC
25mA (typ.)
Inputs:
max. operating range
oil pressure, coolant temp
–2 to +35 VDC
sender, Murphy switch, closed to
ES series
negative on fault
MeCAN has four inputs. Two inputs are for oil pressure and
coolant temperature sensing, either by fault switches or resistive
senders. One input is for engine speed sensing, using a
magnetic pickup or charge alternator. Input signals are
translated into SAE J1939 CANbus messages with appropriate
PGN address, data scaling and transmission rate.
speed input
10 – 60 VAC peak,
adjustable 10 – 180 pulses per rev
0 – 5 kOhm potentiometer
speed calibration
output:
CANbus
SAE J1939 protocol,
120 Ohm terminating resistor fitted.
A fourth input is for the connection of a speed calibration
potentiometer during setup mode only. DIP switches allow
selection of normal/setup mode and two speed input ranges.
An LED gives indication of operating mode and CANbus
activity.
physical:
case material
case dimensions (l x w x h)
weight
operating temperature
environmental sealing
high-impact ABS, epoxy filled
100 x 25 x 15 mm / 4.0 x 1.0 x 0.6 in
approx. 60g / 0.13 lb
–20°C to +85°C / -4°F to +185°F
IP65 case (with DIP switch film
intact), exposed lead ends
2004/108/EC
Two standard versions allow use with a speed input and
either fault switches or Murphy ES series resistive senders:
electromagnetic compatibility
part number
model/description
79.70.0014
MEC300-1 MeCAN I/O module, for use with
Murphy ES pressure & temperature senders
Connection & dimensions
79.70.0020
MEC300-2 MeCAN I/O module, for use with
pressure & temperature switches (closing to
negative DC on fault)
Custom solutions are also available for non-standard, volume
OEM requirements.
MeCAN is compact and light enough for inclusion in many
wiring harnesses, but can also be surface mounted via four
fixing holes. The case is fully sealed in epoxy resin for high
impact and environmental resistance.
OPERATION AND MAINTENANCE
Operation
Maintenance and Warranty
MeCAN contains no user-serviceable parts. Maintenance is
therefore limited to the following preventative checks:
MeCAN begins transmitting J1939 CANbus data immediately
after power-up. Data can be viewed using a J1939 compatible
display, e.g. the Murphy PV101, or used as part of a J1939
control system, e.g. Murphy CANstart or CASCADE modules.
• Check that MeCAN 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.
Engine oil pressure and coolant temperature
Model 79.70.0014 transmits pressure and temperature data
when the sender input is within normal resistance range.
MeCAN also transmits appropriate SPN (Suspect Parameter
Number) and FMI (Fault Mode Indicator) codes if:
MeCAN 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.
• input resistance is out of normal sender range, e.g. open-
or short-circuit
• oil pressure drops below 20 psi (warning message) and
10 psi (shutdown/derate message)
• coolant temperature rises above 90°C/194°F (warning
message) or 110°C/230°F (shutdown message)
Model 79.70.0020 transmits pressure and temperature data in
accordance with the switch position:
Input switch
closed (to –DC)
0 psi &
SPN/FMI code
105°C / 221°F &
SPN/FMI code
Input switch
open
100 psi
oil pressure data
coolant temp data
90°C / 194°F
Oil pressure fault codes are not transmitted until 10 seconds
after engine starting (once speed has risen above 800 RPM).
Engine speed data
RPM data is transmitted whenever a speed signal is present
(above the minimum 10VAC peak). If engine speed exceeds
3500 RPM, MeCAN also transmits the appropriate overspeed
fault SPN and FMI codes.
Battery voltage
MeCAN measures its DC power supply voltage and transmits
this as J1939 ‘electrical potential’ data (PGN 65271).
Hours run
MeCAN transmits ‘engine hours run’ data (PGN 65253).
The hours run value is stored in non-volatile flash memory
and increases only while engine speed is above 500 RPM.
To prolong flash memory life, hours run data is updated at
3 minute intervals.
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, Inc. This document, including
textual matter and illustrations, is copyright protected by Frank W Murphy Ltd., with all rights reserved. © 2008 Frank W Murphy Ltd.
FW MURPHY
FRANK W. MURPHY LTD.
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Salisbury, SP1 1QZ, United Kingdom
Tel: +44 1722 410055
Fax: +44 1722 410088
FW MURPHY INTERNATIONAL TRADING (SHANGHAI) CO. LTD.
Suite 1704, Tower B, City Centre of Shanghai; 100 Zunyi Road,
Shanghai, 200051 China
Phone: +86 21 6237 2082 Fax: +86 21 6237 2083
E-mail: [email protected]
P.O.Box 470248, Tulsa, Oklahoma 74147 USA
+1 918 317 4100 Fax: +1 918 317 4266
E-mail: [email protected]
INDUSTRIAL PANEL DIVISION
Fax: +1 918 317 4124
E-mail: [email protected]
E-mail: [email protected]
FW MURPHY INSTRUMENTS (HANGZHOU) CO. LTD.
77 23rd Street, Hangzhou Economic & Technological Development Area
Hangzhou, Zhejiang 310018 China
COMPUTRONIC CONTROLS
MURPHY POWER IGNITION
41 – 43 Railway Terrace, Nechells,
Birmingham, B7 5NG, United Kingdom
Tel: +44 121 327 8500
Fax: +44 121 327 8501
E-mail: [email protected]
Phone: +86 571 8788 6060 Fax: +86 571 8684 8878
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E-mail: [email protected]
FW Murphy – MeCAN MEC300 installation instructions
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