To check PLC inputs, you need to set your multimeter to the appropriate mode and range, depending on the type of input signal you are measuring. For example, if you are measuring a DC voltage ...

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 ...

Check the module's power and logic indicators. They should change state as you vary that input. If they don't, the module isn't responding. This used to mean an automatic replacement, but it may be ...

Logic gate circuit elements such as XOR, NAND, NOR are implemented in conjunction with CMOS inverters. Through the construction of basic ratio logic gate, the adder and multiplier is simplified, and ...

Multiple input/output Programmable Logic Controller (PLC) module for educational purposes is fabricated because of current PLC Kit that was unable to enhance learners theoretical understanding and ...

The isolated analog input module presented here is particularly suitable for industrial electronics applications. Sending analog signals from field sensors over long-distance cables is often difficult ...

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. The Click C0-04TRS-10 ($54.00) is a ...

Samples and production quantities of the Si838x PLC field input isolators are available now in a compact 20-QSOP package. Si838x family pricing in 10,000-unit quantities begins at $1.91 (USD.) ...