In our previous two issues, we discussed troubleshooting digital output modules. Troubleshooting analog modules is a bit more complicated, for two reasons: Analog modules aren't on/off, as digital ...

Two new 4-channel analog input modules (from $159.00) provide 0-20 mA or 0-10 VDC inputs, and two new 4-channel analog output modules supply 4-20 mA or +/- 10 VDC outputs. The new P2-02HSC high-speed ...

The I/O modules allow easy connections for photo eyes, proximity sensors, limit switches, pushbuttons, light curtains, or any other discrete control device. The 12-bit, low-resolution, 4-channel, ...

Does the module's output correspond correctly to its input? Determine that by forcing the PLC output to 10%, 25%, 50%, 75%, and 90% and measuring on the output terminals at the corresponding range.