CAN wiring Use good quality CAT-5, CAT-5e, or CAT-6 cable to connect between devices in a daisy-chained fashion plugging into one of the two RJ45 connectors on the regulator. At each end of the daisy-chain install a terminator plug into the open RJ45 connector. It is important that the CAN bus be a single end-to-end chain with termination at each end. DO NOT connect an extra CAT-5 cable between the end devices making a loop – instead make sure each end point has one open RJ45 connector and then plug in the terminators.
The total length of the CAT-5 daisy- chain should be kept under 100M (300’) with no more than 100x nodes total f or best reliability.
The RJ45 connectors follow the CiA-303 standard, as shown here:
Figure 1 – CiA 303 CAN RJ45 connector specification
Connect the CAN_H and CAN_L signals. If supported, CAN_SHLD may also be optional connected as needed. It is generally NOT recommended to connect the CAN_GND to anything, as this may create a ground loop between it and ALT-
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