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Curtis 1356/1356P CAN Expansion Module Manual,
Rev. A
7
2 — INSTALLATION & WIRING:
Low Current Connections
Wiring recommendations
Power (Pins J1-1 and J1-13)
The B+ and B- cables should be run close to each other between the module
and the battery. For best noise immunity the cables should not run across the
center section of the module.To prevent overheating these pins, the wire gauge
must be sufficient to carry the continuous and maximum loads that will be
seen at each pin.
Driver outputs (Pins J1-2 and J1-14)
The driver outputs produce high frequency (16 kHz) pulse waves that can
radiate RFI noise. The wire from the module to the load should be kept short
and routed with the return wire back to the module.
CAN bus (Pins J1-11 and J1-23)
It is recommended that the CAN wires be run as a twisted pair. However, many
successful applications at 125 kbit/s are run without twisting, simply using two
lines bundled in with the rest of the low current wiring. CAN wiring should
be kept away from the high current cables and cross it at right angles when
necessary. If the 1356 /1356P is at the end of the CAN bus, the bus needs to
be terminated by externally wiring a 120
Ω
½W resistor across CAN High and
CAN Low (for those models that do not have a 120
Ω
terminal resistor between
CAN H and CAN L).
All other low current wiring
The remaining low current wiring should be run according to standard practices.
Running low current wiring next to the high current wiring should always be
avoided.