Product Overview

The NTAI05 is a high-level analog input termination unit manufactured by ABB (formerly Bailey) for the INFI 90 distributed control system (DCS), designed to provide 15 or 16 channels of analog signal input depending on the slave module type employed . This termination unit serves as the critical interface between field instrumentation and the INFI 90 control system, connecting analog slave modules such as the IMASM01, NASM01, IMASI02, NASI02, or the IMFBS01 Field Bus Slave Module to two-wire transmitters and other field devices . The NTAI05 is an integral component in the INFI 90 architecture, enabling the reliable transmission of process signals from plant equipment to the system’s processing modules.

The NTAI05 termination unit is a single printed circuit board that mounts directly to an NFTP01 Field Termination Panel, providing a consolidated termination point for field wiring with one cable connector (P1) carrying inputs to the slave module . The terminal blocks for field wiring are located on the termination unit itself, simplifying installation and maintenance. Signals from the NTAI05 pass through the connected slave modules to INFI 90 Multi-Function Processors such as the IMMFP01, IMMFP02, and IMMFP03, as well as to Analog Master Modules like the IMAMM03 or Multi-Function Controllers including the NMFC03, NMFC04, and NMFC05 . As an original Bailey Controls design now supported under the ABB brand, the NTAI05 continues to be an essential component for maintaining and servicing installed INFI 90 systems worldwide, with availability through aftermarket suppliers offering new surplus and tested used modules .

 

Technical Specifications

Parameter Name	Parameter Value
Product Model	NTAI05
Manufacturer	ABB (formerly Bailey)
Product Type	Analog Input Termination Unit
System Compatibility	ABB INFI 90 DCS, Bailey INFI 90
Input Channels	15 or 16 (depending on slave module type)
Supported Slave Modules	IMASM01, NASM01, IMASI02, NASI02, IMFBS01
Compatible Processors	IMMFP01, IMMFP02, IMMFP03, IMAMM03, NMFC03, NMFC04, NMFC05
Signal Type	High-Level Analog, 24VDC, 20mA
Field Termination Panel	NFTP01
Cable Connection	P1 connector for signals to slave module
Input Configuration	Dipshunt selectable
Mounting Type	Circuit board mounting to NFTP01 panel
Dimensions	25 x 15 x 10 cm
Weight	0.378 – 0.4 kg
Country of Origin	Sweden
Category	Distributed Control System (DCS) Component

 

Main Features and Advantages

Versatile analog input support: The NTAI05 is designed to interface with a variety of slave modules, including both analog and field bus slave modules, supporting 15 or 16 channels of analog signal input . The termination unit accommodates high-level analog signals with 24VDC and 20mA current input capabilities, making it suitable for a wide range of field instrumentation including pressure transmitters, temperature transmitters, and flow transmitters . When used with IMFBS01 Field Bus Slave Modules, the NTAI05 enables connection to Bailey Controls smart transmitters, extending the system’s capabilities to digital field devices.

Flexible configuration and integration: The NTAI05 features dipshunts that allow users to set the input type according to the specific slave module being used, providing configuration flexibility for different application requirements . The unit is designed to connect to the NFTP01 Field Termination Panel, with P1 cable connector carrying inputs to the slave module and terminal blocks for field wiring located directly on the termination unit . This architecture simplifies field wiring and provides a structured termination point for plant signals. The NTAI05 works in conjunction with NKTU cables, providing seamless connectivity between I/O cards and termination units .

Robust construction and compatibility: The NTAI05 is engineered as a robust printed circuit board for installation within control cabinets and field termination panels, ensuring reliable signal conditioning and termination for analog field signals . As an original Bailey Controls design with ABB legacy support, the NTAI05 provides complete backward compatibility with existing INFI 90 installations and supports integration with multiple processor types including IMMFP01, IMMFP02, and IMMFP03 Multi-Function Processors, as well as NMFC series Multi-Function Controllers . This comprehensive compatibility ensures that the NTAI05 can serve as a direct replacement in diverse INFI 90 system configurations.