RS485 Interface: Wiring, Pins, and Two-Wire vs. Four-Wire Connections
RS485 Interface: Wiring, Pins, and Two-Wire vs. Four-Wire Connections If the equipment communicates correctly on the bench but stops responding after installation, the problem may not be the controller or the device. RS485 wiring depends on topology, cable routing, termination resistors, and grounding. A misconnected A/B pair, missing termination, or incorrect reference can all create