By definition, digital inputs are either on or off. Thus, verifying the absence or presence of voltage is a critical part of troubleshooting digital input modules. But what voltage should you look for ...

Digital input serializers (DIS), the heart of digital input modules, must operate in harsh industrial environments. Voltage and current transients caused by electrostatic discharge, switching of ...

Consequently, both high-side and low-side switches can be read as digital inputs using the chip’s output pins. Also, the inherent transient protection provided in the chip’s output circuit ...

Digital input channels are capable of multiple voltages and current ranges, and feature programmable input thresholds and de-bounce times. Digital outputs support high voltage and current drivers, and ...

The 40-413 is a 32-channel digital I/O module with high-current outputs and dual threshold-voltage inputs. Typical applications include military, aerospace and automotive test ...

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.