Murphy Network Card MEC300 1 User Manual

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.  
Church Rd, Laverstock,  
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  
P.O.Box 470248, Tulsa, Oklahoma 74147 USA  
+1 918 317 4100 Fax: +1 918 317 4266  
INDUSTRIAL PANEL DIVISION  
Fax: +1 918 317 4124  
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  
Phone: +86 571 8788 6060 Fax: +86 571 8684 8878  
CONTROL SYSTEMS AND SERVICES DIVISION  
P.O.Box 1819, Rosenberg, Texas 77471 USA  
Phone: +1 281 633 4500 Fax: +1 281 633 4588  
FW Murphy – MeCAN MEC300 installation instructions  
00-02-0665 28th November 2008 p3/3  
 

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