What is the Purpose of Rack or Chassis in PLC Cabinets?

A rack or chassis is a hardware assembly that helps in housing the processor, communication and input-output modules.


It works in the following ways:

  • It distributes the power evenly
  • It contains the different input and output modules.
  • It acts as a communication link between I/O module and the CPU.

In different PLC systems, there are many different slots for chassis that are available. If a user wants additional chassis they can be connected by using chassis interconnecting cables.