Technical Specifications

FAQ

1. What is the main function of the ABB Bailey NKAS11-15 cable?
The NKAS11-15 is an analog slave termination unit cable designed for ABB Bailey INFI 90 systems. Its primary function is to provide the electrical connection between the IMASI03 analog input slave module and the NTAI06 analog input termination unit. The cable carries the analog input connections between the termination hardware and the I/O module, allowing field signals connected to the NTAI06 to reach the IMASI03 for processing.

2. Which ABB Bailey modules are normally connected by the NKAS11-15?
The NKAS11 cable is specifically associated with the IMASI03 and NTAI06 combination. The IMASI03 handles the analog input processing, while the NTAI06 provides field termination for the analog channels. The NKAS11 provides the dedicated connection between these components. When replacing the cable, the module type and termination-unit configuration should be checked to ensure that the cable assembly matches the installed system.

3. What is the cable length of the NKAS11-15?
The specified cable length for the NKAS11-15 in this configuration is 5 feet. When installing or replacing the cable, the available routing distance should be checked before installation. Avoid excessive bending, pulling, or mechanical tension because these conditions can affect connector seating and long-term signal reliability.

4. What problems can occur if the NKAS11-15 has a poor connection?
A poor connector connection can result in unstable analog input readings, intermittent channel failures, incorrect process values, or loss of several input signals. Because the cable carries multiple analog signal connections, a connector problem may affect more than one channel. Checking connector engagement, locking mechanisms, cable continuity, and terminal-unit connections is recommended when multiple channels show abnormal behavior simultaneously.

5. How can an NKAS11-15 cable fault be diagnosed?
Start by checking both ends of the cable for loose connectors, damaged locking mechanisms, contamination, or physical damage. If the external condition appears normal, perform a suitable continuity test with the system safely isolated according to site procedures. Compare the suspected cable with a known-good cable when possible. If only certain channels are affected, trace the corresponding connections between the NTAI06 and IMASI03 to determine whether the fault follows the cable.

6. Can another ABB Bailey cable be used instead of the NKAS11-15?
A different Bailey termination cable should not be substituted solely because its connector appears similar. The NKAS11 belongs to a specific termination-cable configuration for the IMASI03 and NTAI06. Other cable models, such as NKAS01, NKAS02, or NKAS12, have different applications or insulation configurations. The exact part number and system wiring documentation should therefore be checked before selecting a replacement.

7. Is the NKAS11-15 used for analog or digital I/O?
The NKAS11 is intended for analog input applications. It is associated with the IMASI03 analog input slave module and NTAI06 termination unit. The connected NTAI06 can support several analog input configurations depending on the system setup, including current, voltage, RTD, and other supported input types. The cable itself is primarily the interconnection assembly rather than a signal-conditioning device.

8. What should be checked before replacing an NKAS11-15?
Before replacement, verify the exact cable part number, connected IMASI03 and NTAI06 hardware, cable routing, connector positions, and system configuration. The existing cable should be disconnected only after following the site’s electrical isolation and maintenance procedures. During installation, each connector should be inserted into its correct position and securely latched. After replacement, verify analog input values and channel operation before returning the system to normal service.