The ABB NTDI21-B Termination Unit PLC is a termination module designed for use in industrial process control applications.

It plays a critical role in connecting input/output (I/O) signals to the control system, facilitating data communication between the field devices and the PLC. 

Input Voltage: 24V DC

Input/Output Terminals: Screw terminals for secure and reliable wiring.

NTDI21-B Supports multiple input and output channels, with the exact number depending on the specific system configuration.

Supports digital signals (for on/off control) and analog signals (for continuous data processing), depending on the connected I/O modules.

Offers galvanic isolation between the field devices and the control system, ensuring the protection of sensitive equipment from electrical surges and noise.

Operating Temperature: -20°C to +60°C, depending on the environment.

Storage Temperature: -40°C to +85°C.

Relative Humidity: Up to 95% (non-condensing).

This NTDI21-B unit is part of ABB's I/O system for PLC-based control solutions.

The NTDI21-B serves as a termination unit for electrical signals, ensuring a safe and reliable connection between field wiring and the PLC I/O modules.

Offers a modular design to provide flexible configurations, which allows for easy expansion of the system to meet growing needs.