Power Supply Module
Provides internal power to the PLC, and some power supply modules can also provide power for input signals.
I/O Module
This is the input/output module, where I stands for input and O stands for output. I/O modules can be divided into discrete modules, analog modules, and special modules. These modules can be installed on a rail or rack with multiple slots, with each module inserted into one of the slots depending on the number of points.
Memory Module
Mainly stores user programs, and some memory modules can also provide auxiliary working memory for the system. Structurally, all memory modules are connected to the CPU module.
Post time: Dec-10-2025
