Basler Electric DGC-2020HD - Manual (Page 343)

9469300990 Rev B 333
DGC-2020HD CEM-2020
Notes
1. If the CEM-2020 is providing one end of the J1939 bus, a 120 Ω,
½ watt terminating resistor should be installed across terminals
P1- LO (CANL) and P1- HI (CANH).
2. If the CEM-2020 is not part of the J1939 bus, the stub connecting
the CEM-2020 to the bus should not exceed 914 mm (3 ft) in
length.
3. The maximum bus length, not including stubs, is 40 m (131 ft).
4. The J1939 drain (shield) should be grounded at one point only. If
grounded elsewhere, do not connect the drain to the CEM-2020.
Figure 206. CAN Interface with CEM-2020 providing One End of the Bus
Figure 207. CAN Interface with DGC-2020HD providing One End of the Bus
DGC-2020HD
CEM-2020
Other
Devices
P0069-99
Engine
120 ohm
Termination
CAN-H
CAN-L
AEM-2020
(Optional)
120 ohm
Termination
Bus
Stub
CEM-2020
DGC-2020HD
Other
Devices
P0072-01
Engine
120 ohm
Termination
CAN-H
CAN-L
AEM-2020
(Optional)
120 ohm
Termination
Bus
Stub