master_blaster
Member
I am trying to wire four analog signals to a analog input module AI 4xU/I 2-wire ST (6ES7134-6HD00-0BA1). When I turn on the first device (connected to channel 0), it gives me a reading on channel 0 which is correct, but at the same time it also produces a reading on channel 1, and 2 even though the devices connected to those 2 channels are switched off. The reading is not the same as it is on channel 0, but a lower value. All the devices have their own power supplies, and output an analog signal in the range of 0v...5v. I have tested the wire for shorts, but their is none. Have I connected them right?. I have attached my schematic.