Murphy MEC300-2 Manuel D’Utilisation

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

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. 

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. 
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. 
Two standard versions allow use with a speed input and 
either fault switches or Murphy ES series resistive senders: 
part number 

79.70.0014 

MEC300-1 MeCAN I/O module, for use with 
Murphy ES pressure & temperature senders 

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.  

00-02-0665

28th November 2008

catalogue section 78

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. 

operating voltage 

7 to 35 VDC 

current consumption 

25mA (typ.) 

max. operating range 

–2 to +35 VDC 

oil pressure, coolant temp 

sender, Murphy 

ES series  

switch, closed to 
negative on fault

speed input 

10 – 60 VAC peak,  

adjustable 10 – 180 pulses per rev 

speed calibration 

0 – 5 kOhm potentiometer  

CANbus 

SAE J1939 protocol,  

120 Ohm terminating resistor fitted. 

case material 

high-impact ABS, epoxy filled 

case dimensions (l x w x h)  

100 x 25 x 15 mm / 4.0 x 1.0 x 0.6 in

weight 

approx. 60g / 0.13 lb 

operating temperature 

–20°C to +85°C / -4°F to +185°F 

environmental sealing 

IP65 case (with DIP switch film 

intact), exposed lead ends 

electromagnetic compatibility 

2004/108/EC