PLC I/O Modules (input/output)
The Input module has terminals into which outside process electrical signals, generated by sensors or transducers are entered.
- Racks and Chassis: The rack on which the Programmable Logic Control is mounted.
- Input and Output Modules: We get information in and out of the PLC through the use of input and output modules. The input module terminals receive signals from wires connected to input sensors and transducers. The output module terminals provide output voltages to energize actuators. There are typically 4,8,12,16 and 32 terminals per module.