By default, we ship the MCU CAN without resistors, and we ship the CM4 adapter CAN with resistors, but there is some variation in both depending on customer requests. To be sure, a multimeter will confirm if the 120ohm resistance is present across the CAN pins.

If desired for your application, we can also post instructions on how to de-populate or re-populate the internal resistors yourself, keeping in mind that this modification will void the warranty. It is generally recommended to build termination into the wire harness instead of on the devices unless the network layout is simple (short distance, 2-3 devices).