MeCANTM
00-02-0665
revision D, 19th August 2015
Mechanical Engine to CAN J1939 interface
MU�
section 78
Installation Instructions
by
El{OVATION CONTROLS
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
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, non-ECU engines into modern CAN
bus systems. Applications include the retrofit of older engine
fleets with modern digital instruments, controls and telemetry
and the development of standard control panels
for both ECU
and non-ECU 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 appropriate PGN address, data scaling and
transmission rate. The shut-down output operates and latches if
the pressure, temperature or speed inputs deviate outside
preset fault limits.
A fourth input is connected to a speed calibration potentiometer
during set-up mode only. DIP switches allow selection of
normal/set-up mode and two speed input ranges. An LED
gives indication of operating mode and CAN bus activity.
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.
Two standard versions allow use with either fault switches or
Murphy ES series resistive senders:
part number
model/description
E2501300
MEC301-1 MeCAN 1/0 module, for use with
Murphy ES pressure & temperature senders
E2501200
MEC301-2 MeCAN 1/0 module, for use with
pressure & temperature switches (closing to
negative DC on fault)
Custom solutions are also available for non-standard, volume
OEM requirements.
CE
Specifications
Power supply
Operating voltage, steady state: 7 to 35 voe
Current consumption: 25mA (typ.)
Inputs
Maximum operating range: -2 to +35 voe
Oil pressure, coolant temperature:
MEC301-1, E2501300 : for resistive senders, Murphy ES series
MEC301-2, E2501200 : for switches, closed to negative DC on fault
Speed (magnetic pickup):
opto-isolated, 3 - 30 Vrms, adjustable 10 - 180 pulses per rev
Speed calibration: O - 5 kOhm potentiometer (setup only)
Outputs
Shutdown: negative DC (open collector transistor), 250mA max.
CAN bus:
SAE J1939 protocol, 120 Ohm terminating resistor fitted.
Physical
Case material: high impact ABS, epoxy filled
Dimensions: see diagram below
Weight: approx 60g
I
0.13 lb
Operating temperature: -20 to +85 °C /-4 to +185 °F
Environmental sealing:
IP65 (with DIP switch protective film intact), exposed lead ends
Electromagnetic compatibility: 2004/108/EC
Connection and Dimensions
Dimensions in mm (in.) for reference only. Use actual product for template.
Standard lead length= approx. 100 mm (4.0 in.)
