SmartROC T35/T40 22 Service Tool Bag RCS
141 No: 7026962571.1.7027002891 en-US
Pin Function
5 CAN Low
Table8: Pin Configuration, CAN Inputs and Outputs, Other Modules
1.
Set the multimeter range to DC volt.
2.
Connect the 5-pin connectors of the tester to the CAN network requiring measure-
ment:
a.
Decoder: contact X3 or X4
b.
Display, application, and master modules: connector X2, X3, or X4
c.
I/O modules: contact X1 or X19
d.
Resolver modules: contact X3 or X4
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Main power (supply voltage) 24–28 V (shines green)
CAN power (CAN power supply) 20–24 V (shines green)
CAN Hi (CAN communication), about 2.5 V (flashes green)
CAN Low (CAN communication), about 2.3 V (flashes green)
Table9: Normal State
CAN Hi glows red constantly for short circuit to ground
CAN Hi glows green constantly for voltage above 3.5 V
CAN Low glows green constantly for short circuit to ground
CAN Low glows red constantly for voltage above 3.5 V
If neither CAN Hi nor CAN Low is lit, there is no communication even though power
is being supplied to CAN.
If any light is flashing red, then CAN communication is at the wrong level or is in-
verted.
Table10: Fault Indication
22.2 Checking CAN Power Supply
The power supply for the module, the CAN power supply and the CAN communication can
be measured and checked using the CAN test equipment.
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