MoTeC
Appendices
37
Appendix D – Wiring Details
Power Connections
Care must be taken for power and ground wiring for the LTC. Each sensor
can draw over 3 Amps when cold if multiple channels of Lambda are used this
current draw will increase dramatically. Wiring size should be suitable for the
number of LTCs used.
Tip:
To wire the LTC to power, connect either to the ignition switch for fast
sensor start up or connect to the fuel pump relay to prevent accidental battery
drainage
CAN Connections
Refer to the example below for details on wiring the LTC CAN bus.
This examples show multiple options (USB and Ethernet) for the PC interface.
See section
CAN Bus Interface
for details on PC interfacing.
General CAN Bus Wiring Requirements
The CAN bus should consist of a twisted pair trunk with 100R terminating
resistors at each end. The preferred cable for the trunk is 100R data cable.
The maximum length of the bus is 16 metres (50 ft)
CAN devices (such as MoTeC Data Loggers, ECUs etc) may be connected to
the trunk with up to 500 mm (20 in) of twisted pair wires.
An optional CAN connector for the UTC may also be connected to the trunk
with up to 500 mm (20 in) of twisted wire and should be within 500 mm of one
end of the trunk.
100R
100R
LTC
M1
ECU
Display
Logger
LTC
LTC
LTC
CAN-HI
CAN-LO
Ethernet
UTC
(optional)
USB
PC
PC
PC
Ethernet
Summary of Contents for LTC
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