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I have a couple of these d50 plc's and tried testing them. I jumpered the 24v common to the common input line and then the 24v + to the input 0,1,2 & 3 all one at a time. No response indicated on the input leds. Am I missing something? I also swapped polarity but no change.
The green run light works, the 24v power is good also.
The green run light works, the 24v power is good also.