Good evening, all. I'm a student and new to the PLC world and new to the Forum. I'm working on a class project but am unable to get my MicroLogix 1100 (1763-L16BWA) to recognize the NPN proximity sensor (Taiss LJ12A3-4-Z/AX) once I connect the the 0V. When I connect the power (brown) wire to my controller 24V+, the 0V (blue) wire to my 24V-, the light on the sensor lights up and my meter reads correct voltage. However, once I connect the sensor's output (black) wire to my PLC input, the indicator light goes off on the PLC. Since my PLC doesn't acknowledge it, my program doesn't respond. I'm at a loss as to why this is happening so I don't know anything more to try. Thoughts? Suggestions? Thanks! d