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v120-22-ra22 Inputs not responding

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I'm using the V120-22-RA22 plc, I have switches connected to some inputs then connected to a 24V power source. But when running the plc, with the switches to test it, they are not responding. My guess that I would need to connect the CM, but I'm not sure. I checked the jumpers and they are all set to be digital inputs. 


Any advice would help, I'm not very familiar with this plc. 



Abby Moore 

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