A PLC requires much less what compared to a hardwired relay panel?

The statement regarding a PLC requiring much less space compared to a hardwired relay panel highlights one of the key advantages of using programmable logic controllers (PLCs) in control systems.

PLCs are designed to be compact and can integrate multiple functions into a single unit, minimizing the physical footprint required for installation. Unlike traditional hardwired relay panels, which can become quite bulky due to the numerous relays, wiring, and auxiliary components typically needed to achieve the desired control logic, PLCs streamline this process by utilizing software for programming. This eliminates the need for extensive wiring and reduces the overall size of the control system.

In addition to physical space, a PLC's modular design often allows for easy expansion or modification without significant alterations to the physical setup. This adaptability is especially beneficial in environments where space is limited or where future changes are anticipated.

Thus, the requirement for less space is a critical reason why PLCs are increasingly favored in many applications over traditional hardwired systems.