Higher amperage relay output modules and an 8-point input simulator module are now available from AutomationDirect ... AutomationDirect Click PLC units, starting at $69.00, are low-cost, ...

New AC and DC discrete I/O modules include 8-point, 100-120 VAC input and output modules, 8- and 15-point, 3.3-24 VDC input and output modules and high-density, 32-point,12-24 VDC input modules. The I ...

If they do, the problem is on the processor side of the input module. Next, watch the PLC logic for a corresponding change. If it doesn't happen, then the signal isn't making it from the input module ...

Whether it has or not, you need to use a meter to test the module's output versus input. One verification technique that works well is to simulate the signal from the PLC by forcing the output. This ...

To do this, typically two high-power resistor-dividers, which are located in the digital input module of a programmable logic controller (PLC), detect the sensors’ output voltages. Individual ...

All of the field devices are wired to the input/output (I/O) system of the PLC, which consists of two key parts — the I/O modules and the rack. The I/O modules have connection terminals to which the ...

The PuffinPLC Project is an effort to produce a Linux-based GNU Public Licensed Programmable Logic Controller (PLC). PLCs were developed in the 1960s to replace the complex electrical relay circuits ...