I have an SLC 5/03 with I/Os in one of our machine. I am facing a problem with an Allen Bradley PLC Input card 1746-IA16 (85-132VAC) that voltage at its terminal block of an input (not specific, some time 5, some time 8 or some time 12 etc.) is high but related LED doesn’t ON and no operation performs by PLC for related input. I have replaced 3 cards till now due to this problem but could not understand that why it happens. The supply voltage remains between 110-120VAC.
I need assistance to overcome on this problem.
I need assistance to overcome on this problem.