2 — INSTALLATION SPECIFICATIONS AND WIRING
pg. 27
Return to TOC Curtis Model 1351 – December 2018
CAN Ports
Two CAN ports are provided. Either port can be used for protocols that use the 11-bit identier (such
as CANopen) or the 29-bit (such as J1939). Port 1 must be used for FLASH programming and CSS
tool interfacing. e CAN ports are not isolated, sharing the 1351 internal power supply and I/O
ground (B -) reference. Each CAN port requires a unique Node IDs and can run a dierent baud rate.
Additionally, they can be combined (connected together) via a parameter setting. When combined,
each port’s communications are received and sent out on the other port. When combined, both ports
must use the same baud rate. Termination for each port is selected electronically and is controlled
by the CAN port setup parameters. Upon power-up/KSI On, the programmed termination state of
each port is applied in under 100 ms.
Table 16 CAN Ports
Signal Name Pin
Data Rate
(bps)
Input
Impedance
CAN Termination
(Internal)*
CAN1 Low 3
0 = 125k
1 = 250K
2 = 500K
3 = 800K
4 = 1M
<1000pF
120 Ω
* settable parameter
CAN1 High 4
CAN2 Low 5
CAN2 High 6
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