Installation
15
© 2017 DynaGen Technologies Inc
TOUGH Series Manual
2.6.4
CAN Bus Wiring
The following table outlines some items that must be taken into consideration when connecting to a CAN bus engine.
Consideration
Description
Bus Termination
Each end of the bus must be terminated from CAN H to CAN L with /- 10 Ohm
resistors. The resistor must be able to handle at least 400mW of power dissipation.
Cable Selection
A twisted pair 120Ohm impedance cable is required for communications. For better protection a
shielded twisted pair cable is recommended.
Examples are:
1.
Belden 9841 - Shielded cable with one twisted pair, 24AWG
2.
Belden 7895A - Shielded cable with two twisted pair, 20AWG
For short runs of 5 feet or less regular 18AWG wiring can often be run.
Shielding
If using a shielded cable the shield must be connected to ground on one end of the bus only.
This prevents loss of data from electromagnetic interference.
Termination at the Controller
The twisted pair cable must terminate no farther than 6 inches from the controller's CAN (J1939)
connector. Three inches is ideal.
Communications Wiring
It is common practice to use the fuel output to trigger the ECM key input to enable the ECM before cranking. For some ECMs to
function, they must be powered/enabled for a certain period before cranking to allow time for the ECM to boot up. There are two
ways to provide this time:
·
Set a preheat time or increase the preheat time to allow longer time for the ECM to boot up before cranking. The fuel
output turns on at the start of preheat.
·
Enable the Auto Power ECM setting in the Communications -> CAN Bus (J1939) menu will cause the fuel output to turn on
in Auto mode and stay on.
ECM Wiring
Summary of Contents for TG410
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Page 12: ...Installation 11 2017 DynaGen Technologies Inc TOUGH Series Manual 2 4 Typical Wiring Diagram ...
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