The MeCAN™ is a compact, encapsulated interface module that translates resistive sender, fault switch and speed signals into SAE J1939 CAN bus data.

MeCAN allows quick and simple integration of mechanical engines into modern CAN bus systems. Applications include the retrofit of older engine fleets with modern digital instruments, controls and telemetry, engine  hour tracking and the development of standard control panels for mechanical engines. MeCAN has three sensor inputs and one output. Two inputs are for oil pressure and coolant temperature sensing, either by fault switches or resistive senders. The third input measures engine speed using a  magnetic pickup or charge alternator signal. Input signals are translated into SAE J1939 CAN bus messages with assigned PGN address, data scaling and transmission rate. The output can drive an alarm lamp or buzzer or actuate a shut-down relay if the pressure, temperature or speed inputs deviate outside preset fault limits.

  • CE
Specifications Downloads How To Order

Power supply

  • Operating voltage: 7 to 35 VDC
  • Current consumption: 25 mA (typ.)


  • Maximum operating range: -2 to +35 VDC max.
    • Oil pressure, coolant temperature (model MEC301-1): for Murphy ES(2)P and ES(2)T series resistive senders
    • Oil pressure, coolant temperature (model MEC301-2): for fault switch, closing to negative DC on fault
  • Speed (magnetic pickup): Opto-isolated, 3 – 30 Vrms, adjustable 10 – 180 pulses per rev
  • Speed calibration: 0 – 5 kOhm potentiometer (setup only)

Outputs (all ratings non-reactive)

  • Shutdown: Negative low-side or ground switch, 250 mA max.
  • CAN bus: SAE J1939 protocol with 120 Ohm terminating resistor


  • Case material: High impact ABS, epoxy filled
  • Weight: Approx 60 g / 0.13 lb
  • Operating temperature: -40° F to 185° F (-40° C to 85° C) Environmental sealing: IP65 case (with DIP switch protective film intact), exposed lead ends
  • Electromagnetic compatibility: 2004/108/EC
  • Electrical:
    • J1113-11 pulses 1c, 2a, 3a/b and 5a
    • EN 61000-4-2 ESD
    • EN 61000-4-3 Radiated disturbance
    • EN 61000-4-4 Fast transients
    • EN 61000-4-5 High energy transients
    • EN 61000-4-6 Conducted RF disturbance
    • CISPR 16-1-2, 4.3 conducted emissions
    • CISPR 16-2-3 Radiated emissions

 WARNING: This product may expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information about California Propsition 65, go to or visit our California Proposition 65 page.

Additional product documentation can be found on our product support website or by clicking the Help Center button above.

Part Number Model/Description Notes
E2501300B MEC301-1-TR MeCAN I/O module with terminating resistor for use with ES(2)P pressure and ES(2)T temperature senders
E2501200B MEC301-2-TR MeCAN I/O module with terminating resistor for use with pressure and temperature switches (output closes to ground on fault)
79700096 (UK Part) MEC301-1 MeCAN I/O module for use with Murphy ES(2)P pressure and ES(2)T temperature resistive senders
79700097 (UK Part) MEC301-2 MeCAN I/O module for use with pressure & temperature switches (closing to negative DC on fault)

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