Creating a Loopback Cable for the NI-9853 C-Series CAN ModuleHardware: Industrial Communications>>CAN>>NI 9853
Problem: I would like to test my NI-9853 by performing a loopback test. How can I create a proper CAN cable? Solution: Since the CAN1 port on the NI-9853 needs to be powered by the bus, a cable will need to be modified to supply power to the port to perform a loopback test. The CAN0 port is supplied power from the backplane of the cRIO chassis, but connecting the pins to power will not damage the hardware. For a loopback test, the network will also need to be terminated using 120 ohm resistors between CAN_H and CAN_L. The diagram below shows the optional and required connections for the cable.   Connecting the cable in this manner will allow the cable to properly power the NI-9853 and will termintate the network properly. This will allow you to run the CAN Basic.lvproj example to perform a loopback test. Related Links: KnowledgeBase 4T7CHPBP: NI 9853 and 9852 with CompactRIO FAQ KnowledgeBase 3PBC3AUX: Why Doesn't the CAN1 Port Work on my NI-9853 cRIO CAN Module? Attachments:
Report Date: 06/16/2009 Last Updated: 06/16/2009 Document ID: 4YFEPK3Q |
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