PLC Expansion

PLC Expansion BD Board What is it?

The PLC Expansion BD Board, or Board Expansion (BD) for PLCs, is a small expansion board that directly installs onto the PLC CPU to enhance specific capabilities such as increasing communication ports, expanding inputs/outputs, or adding special functions without requiring external expansion modules.

Guidelines for Using PLC Expansion BD Boards

• It can only be used with PLC models that support BD slots.
• Multiple boards cannot be installed simultaneously (depending on the model).
• Carefully check the PLC manual to determine which BD versions are supported for efficient installation.

PLC Expansion Module What is it?

The PLC Expansion Module is an add-on device for PLCs to enhance system capabilities, such as increasing the number of inputs/outputs, adding communication ports, or enhancing special signal measurement and controlling specific equipment. Some systems require additional devices like analog sensors, Ethernet ports, or servo control due to having more input/output requirements than available on the CPU.

Popular Types of PLC Expansion Modules

• Digital Input Module for increasing digital signal inputs (ON/OFF).
• Digital Output Module to increase digital output channels.
• Analog Input Module for receiving analog signals.
• Analog Output Module for sending analog signals.
• Temperature Input Module to receive signals from thermocouples and RTDs.
• Communication Module to add communication ports.
• High-Speed Counter Module for receiving high-speed counting signals.
• Motion / Servo Module for precise motor control.