A digital I/O interface module connects a PLC's input and output to terminal blocks on printed circuit boards via a special pre-wired cable.

A digital I/O interface module connects a PLC's input and output to terminal blocks on printed circuit boards via a special pre-wired cable.

• A. False
• B. True
• C. Only for inputs
• D. Only for outputs

Answer: (B)

The main idea is that a digital I/O interface module serves as the bridge between the PLC and field wiring, handling both inputs and outputs. It provides terminal blocks on adjacent PCBs, and a pre-wired cable connects those blocks to the module so signals can flow in both directions reliably. This setup is common because it simplifies wiring, ensures consistent electrical characteristics, and keeps the PLC and field wiring neatly organized. So the statement is true because the module typically connects both inputs and outputs to terminal blocks via a pre-wired cable.

The main idea is that a digital I/O interface module serves as the bridge between the PLC and field wiring, handling both inputs and outputs. It provides terminal blocks on adjacent PCBs, and a pre-wired cable connects those blocks to the module so signals can flow in both directions reliably. This setup is common because it simplifies wiring, ensures consistent electrical characteristics, and keeps the PLC and field wiring neatly organized. So the statement is true because the module typically connects both inputs and outputs to terminal blocks via a pre-wired cable.