Product Overview

The ABB Bailey NKAS01-20 is an INFI 90 analog module termination cable used to connect an analog I/O termination arrangement with the associated INFI 90 control system hardware. It forms part of the physical signal interconnection used in ABB Bailey INFI 90 process control installations.

In an INFI 90 cabinet, the termination arrangement provides an organized point for field wiring, while the termination cable carries the corresponding connections to the analog I/O interface. This architecture keeps field wiring separated from the electronic I/O hardware and simplifies cabinet-level signal organization.

The NKAS01-20 is suited to existing INFI 90 installations where a 20-foot cable length is required by the cabinet layout or equipment arrangement. It is particularly relevant for maintenance, replacement, and system refurbishment work where the original termination architecture is being retained.

Technical Specifications

Product Features

• Designed for ABB Bailey INFI 90 analog module termination applications.
• Provides the physical interconnection between termination hardware and analog I/O system components.
• Supports organized analog signal routing within an INFI 90 control cabinet.
• Suitable for established INFI 90 systems where the original termination architecture is maintained.
• Provides a 20-foot cable configuration for installations requiring extended interconnection length.
• Useful for replacement and maintenance of existing termination cables.
• Suitable for retrofit and service work on ABB Bailey INFI 90 installations.
• Provides a passive signal path without independently processing the analog signals.

Working Principle

The NKAS01-20 operates as a passive electrical connection within the INFI 90 analog I/O signal path. It carries the corresponding electrical connections between the termination assembly and the associated analog I/O module.

For analog input applications, field instruments send process signals to the termination assembly. The signals then pass through the termination cable to the analog I/O module for processing by the INFI 90 control system.

Field devices → Termination assembly → NKAS01-20 → Analog I/O module → INFI 90 control system

For analog output applications, the signal path operates in the opposite direction. The control system generates an analog command, the I/O module handles the signal, and the termination arrangement passes the command toward the field device.

Role in an INFI 90 I/O Control Architecture

The NKAS01-20 occupies the physical interconnection layer between an INFI 90 analog termination arrangement and its associated I/O module. It does not execute control logic or perform analog signal processing; its function is to maintain the required electrical path between the termination and I/O sections.

Industrial Applications

Installation and Maintenance

1. Confirm that the NKAS01-20 matches the existing INFI 90 analog termination arrangement before installation.
2. Verify that the required cable routing accommodates the specified cable length.
3. De-energize or isolate the relevant I/O section according to the plant maintenance procedure.
4. Identify the termination and analog module interfaces before disconnecting the existing cable.
5. Inspect connectors for bent pins, contamination, corrosion, or mechanical damage.
6. Route the cable without excessive bending, pulling, or mechanical tension.
7. Keep the cable routing consistent with the cabinet’s established wiring arrangement.
8. Ensure both connectors are fully seated and mechanically secured.
9. Verify the cable routing and connections against the applicable system documentation.
10. Check analog I/O channels for unexpected signal abnormalities after replacement.
11. Inspect cable condition and connector integrity during scheduled cabinet maintenance.
12. Record the installed model and associated termination arrangement for future maintenance work.

Related Components

Recommended Related Models

Key Advantages

• Provides a dedicated interconnection for INFI 90 analog module termination.
• Maintains the established ABB Bailey I/O wiring architecture.
• Supports organized analog signal routing between termination and I/O hardware.
• Suitable for maintenance and replacement of existing INFI 90 installations.
• Provides a 20-foot cable configuration for applicable cabinet layouts.
• Useful for retrofit and service applications where the original system wiring must be preserved.

Technical FAQs

What is the purpose of the ABB Bailey NKAS01-20?

The NKAS01-20 provides the electrical interconnection between an INFI 90 analog termination arrangement and the associated analog I/O module. It serves as a passive connection component within the I/O signal path.

Is the NKAS01-20 an analog I/O module?

No. The NKAS01-20 is a termination cable. Analog signal processing is performed by the associated INFI 90 analog I/O hardware.

What should be checked when replacing an NKAS01-20?

The existing termination arrangement, mating interfaces, analog I/O module, cable routing, and required cable length should be verified before replacement. Correct channel connections should also be confirmed after installation.

What is the difference between NKAS01-20 and NKAS01-15?

Both are ABB Bailey INFI 90 analog module termination cables within the NKAS01 family. The primary difference specified here is the cable length: NKAS01-20 uses a 20-foot configuration, while NKAS01-15 uses a 15-foot configuration. The replacement should match the physical requirements of the existing installation.