Higher amperage relay output modules and an 8-point input simulator module are now available from AutomationDirect for the Click series stackable micro brick PLCs.

Troubleshooting PLC Digital Input Modules, Part 2 If input power is missing, the causes can be such things as blown fuses, broken wiring, or broken connections.

In the previous two issues of this newsletter, we looked at troubleshooting digital input modules. Basically, we looked for the presence or absence of a voltage. With analog modules, it's trickier ...