Product Overview

The ABB Bailey NKAS01-15 is an INFI 90 analog module termination cable used to establish the field wiring connection between an analog I/O termination arrangement and the associated INFI 90 control system hardware. It belongs to the ABB Bailey termination and interconnection hardware used around INFI 90 process control installations.

In an INFI 90 system, termination cables help move field wiring from the termination point to the corresponding I/O interface without requiring individual point-to-point connections directly at the control module. This makes the cable part of the physical signal path between field termination hardware and the system I/O interface.

The NKAS01-15 is intended for installations where the cable length and termination arrangement match the existing system configuration. It is particularly relevant for maintenance, replacement, and expansion work on established ABB Bailey INFI 90 systems where the original termination architecture needs to be preserved.

Technical Specifications

Product Features

• Designed for ABB Bailey INFI 90 analog module termination applications.
• Provides an organized interconnection between termination hardware and analog I/O system components.
• Suitable for maintaining the established wiring architecture of INFI 90 installations.
• Supports analog signal routing within the system’s I/O termination arrangement.
• Useful for replacement of existing termination cables during system maintenance.
• Suitable for retrofit and service work where the original INFI 90 interface arrangement must be retained.
• Cable length is specified for applications requiring a 15-foot interconnection.
• Helps simplify installation compared with individually routing every analog field connection to the I/O module.

Working Principle

The NKAS01-15 functions as a passive electrical interconnection within the INFI 90 I/O signal path. It does not independently process, condition, or control the analog signal. Instead, it provides the physical conductor path between the termination assembly and the associated analog module interface.

Field devices connect to the termination side of the I/O architecture. The termination arrangement organizes these field signals, while the NKAS01-15 carries the corresponding connections toward the analog I/O module.

Field devices → Termination assembly → NKAS01-15 → Analog I/O module → INFI 90 control system

For output applications, the signal direction is reversed: the control system sends the analog command through the I/O module and termination arrangement toward the field device. The cable therefore serves as part of the fixed signal interconnection rather than as an active signal-processing device.

Role in an INFI 90 I/O Control Architecture

The NKAS01-15 sits between the termination hardware and analog I/O interface in an ABB Bailey INFI 90 system. Its purpose is to maintain the physical connection between these system elements while keeping field termination separate from the electronic I/O module.

Industrial Applications

Installation and Maintenance

1. Confirm that the NKAS01-15 matches the existing INFI 90 analog termination arrangement before installation.
2. Identify both cable ends and their corresponding termination and module interfaces.
3. De-energize or isolate the relevant I/O section according to the plant maintenance procedure.
4. Inspect connectors for bent pins, contamination, corrosion, or mechanical damage.
5. Route the cable without excessive bending or mechanical tension.
6. Keep the cable away from potential sources of electrical interference where the cabinet layout requires it.
7. Ensure each connector is fully seated and mechanically secured.
8. Verify cable routing against the original cabinet documentation before energizing the system.
9. Check analog I/O channels for unexpected open-circuit or signal abnormalities after replacement.
10. Confirm that input and output channels correspond to the correct field devices.
11. Inspect cable condition periodically during cabinet maintenance activities.
12. Record the installed cable model and termination arrangement to simplify future INFI 90 maintenance.

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.
• Separates field termination from the analog I/O electronics.
• Suitable for maintenance and replacement of existing INFI 90 installations.
• Supports organized analog signal routing within control cabinets.
• Useful for retrofit and service applications where original system wiring must be preserved.

Technical FAQs

What is the purpose of the ABB Bailey NKAS01-15?

The NKAS01-15 provides the electrical interconnection between an INFI 90 analog termination arrangement and the associated analog I/O module. It is a passive connection component rather than an active signal-processing module.

Is the NKAS01-15 an analog input or output module?

No. The NKAS01-15 is a termination cable. The actual analog signal processing is performed by the associated INFI 90 analog I/O hardware.

What should be checked when replacing an NKAS01-15?

The existing INFI 90 termination arrangement, mating connectors, analog I/O module, cable routing, and cable length should be verified before replacement. Connector compatibility and correct channel wiring are particularly important.

Can a different cable length be used as a direct replacement?

The replacement should match the original system’s physical routing requirements and termination configuration. A different cable length should not be treated as an automatic substitute simply because the connectors appear similar.