Winco DGC-2020 - Manual (Page 229)

CANbus Interface
These terminals provide communication using the SAE J1939 protocol and provide high-speed
communication between the LSM-2020 and the DGC-2020. Connections between the LSM-2020 and
DGC-2020 should be made with twisted-pair, shielded cable. CANbus interface terminals are listed in
Table 8-4. Refer to Figure 8-4 and Figure 8-5.
Table 8-4. CANbus Interface Terminals
Terminal Description
P2-12 (CAN L) CAN low connection (green wire)
P2-11 (CAN H) CAN high connection (yellow wire)
P2-10 (SHIELD) CAN drain connection
NOTES
1.) If the LSM-2020 is providing one end of the J1939 bus, a 120
 terminating
resistor should be installed across terminals P2-12 (CANL) and P2-11
(CANH).
2.) If the LSM-2020 is not part of the J1939 bus, the stub connecting the LSM-
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 LSM-2020.
AEM-2020
(Optional)
LSM-2020
Other
Devices
P0053-58
Engine
120 ohm
Termination
CAN-H
CAN-L
CEM-2020
(Optional)
DGC-2020
120 ohm
Termination
Bus
Stub
Figure 8-4. CANbus Interface with LSM-2020 providing One End of the Bus
9400200990 Rev K DGC-2020 LSM-2020 (Load Share Module) 8-9