In our previous issue, we noted that the first step in troubleshooting digital input modules is to verify the power source of each loop. If input power is missing, the causes can be such things as ...
MODULE;MPN 6ES7 331-7KF02-0AB0;MFR SIEMENS;PLC EXPANSION,ANALOGUE;SUPPLY 24V;MEMORY CAPACITY 12BIT;NUMBER OF INPUTS:8 INP Manufacturer Part Number 6ES7 331-7KF02-0AB0 - SIEMENS ...