DynaGen
TM
TOUGH Series
TM
TE410 - EN
User Manual
20
9M02-9249-A001-EN
Revision A
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 a 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 > CANbus (J1939) menu, which will cause
the fuel output to turn on in Auto Mode and stay on
ECM Wiring
2.6.5 Modbus Wiring
The following table outlines some items that must be taken into consideration when connecting up a Modbus
system.
Consideration
Description
Bus Termination
Each end of the bus must be terminated from A to B with 120
Ω +/- 10 Ω resistors.
The resistor must be able to handle at least 400 mW of power dissipation.
Cable Selection
Shielded twisted pair 120
Ω impedance cable is required for communications.
Shield drain wire is NOT to be used for the RS485 common. The cable must have
one twisted pair for A and B and a separate wire or twisted pair for common.
An example is Belden 7895A, a two twisted pair, 20 AWG, where the second pair
can be used for the RS485 common.
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