Product Overview

The ABB Bailey NKST11-10 INFI 90 SOE Time Synchronization Cable is a cable assembly used in ABB Bailey INFI 90 control-system installations for Sequence of Events (SOE) time synchronization.

The 10-foot length suits installations where compatible SOE and synchronization hardware are positioned within a relatively short cabinet or equipment-area connection distance. In an operating plant, this type of connection can be part of the timing path used to maintain a common time reference for event records.

SOE applications become particularly valuable during equipment trips and abnormal process conditions. A breaker may change state, a motor may stop, an interlock may activate, and an alarm contact may change within a very short interval. Engineers need more than the individual event states; they also need their chronological relationship.

The NKST11-10 supports the physical timing connection used by the surrounding INFI 90 hardware.

A typical relationship can be represented as:

Time Synchronization Source → NKST11-10 → INFI 90 SOE Hardware → Event Records

The cable does not perform event processing itself. Its purpose is tied to the synchronization connection required by the compatible INFI 90 SOE architecture.

Technical Specifications

Product Features

• ABB Bailey INFI 90 SOE Time Synchronization Cable
• Model NKST11-10
• 10-foot cable length
• Used for SOE time synchronization connections
• Applicable to compatible INFI 90 control-system hardware
• Supports time-correlated event recording
• Suitable for process-control installations
• Useful for SOE maintenance and replacement work
• Applicable to event-sequence investigation
• Intended for system-specific synchronization connections

Working Principle

The NKST11-10 forms part of the physical timing path between compatible synchronization equipment and the INFI 90 SOE system.

A practical SOE sequence can be represented as:

Common Time Reference → Synchronization Connection → SOE Hardware → Event Timestamp

When a field event occurs, the corresponding I/O hardware detects the state change. The SOE system records that event together with the applicable time information.

For example:

Breaker Trip → Digital Status Changes → SOE Event Recorded → Synchronized Timestamp

A second event occurring shortly afterward may follow:

Motor Stop → Status Input Changes → SOE Event Recorded → Synchronized Timestamp

Engineers can then compare the recorded event times to determine which action occurred first.

The NKST11-10 does not interpret the process condition or execute control logic. Its role is within the timing connection that supports accurate event correlation.

Role in an INFI 90 SOE Architecture

The NKST11-10 belongs to the synchronization portion of an INFI 90 SOE installation.

Time Reference → NKST11-10 → SOE Infrastructure → Event Records → Engineering Analysis

The exact connection arrangement depends on the existing INFI 90 installation.

SOE Time Correlation

Sequence-of-events recording is useful when several equipment conditions change during the same incident.

A typical disturbance may contain:

With a common timing reference, these events can be arranged chronologically instead of being treated as unrelated status changes.

For maintenance and troubleshooting, this information can help determine whether an alarm occurred before an equipment trip, whether a protection action preceded a shutdown, or whether two status changes happened within the same disturbance window.

Industrial Applications

Installation and Maintenance

The 10-foot cable length should be checked against the actual routing between the connected INFI 90 components.

• Confirm the complete NKST11-10 model.
• Verify that the existing application requires an SOE time synchronization cable.
• Confirm the required 10-foot length.
• Identify both connection points before removal.
• Record the existing cable routing.
• Inspect connectors before installation.
• Check the cable jacket for cuts, deformation, or mechanical damage.
• Avoid sharp bends and unnecessary pulling force.
• Keep the cable routed in accordance with the existing installation.
• Confirm that both connectors are fully seated.
• Check the associated synchronization hardware.
• Verify synchronization status after installation.
• Generate or review representative SOE events.
• Check event timestamps.
• Compare recorded times with known equipment operations.
• Confirm that the SOE event sequence is being recorded correctly.
• Document the replacement and cable configuration.

A synchronization problem should be investigated across the complete timing path. The cable, connection points, synchronization source, receiving hardware, and system configuration can all affect the final SOE result.

Compatible System Components

Recommended Related Models

Key Advantages

• ABB Bailey INFI 90 SOE Time Synchronization Cable.
• Model NKST11-10.
• 10-foot cable configuration.
• Supports SOE timing connections.
• Suitable for time-correlated event recording.
• Useful for trip and disturbance analysis.
• Applicable to INFI 90 maintenance projects.
• Suitable for replacement of compatible synchronization cabling.

Technical FAQs

What does the “-10” designation indicate on the NKST11-10?

For this product configuration, the specified cable length is 10 feet. The length should be matched to the physical distance and routing requirements of the existing INFI 90 installation.

Where is the NKST11-10 used in an INFI 90 system?

It belongs to the SOE time-synchronization connection layer. It is used with compatible INFI 90 synchronization and event-recording hardware rather than as a conventional field input or output cable.

Why can an SOE system still show events when its timing connection has a problem?

Event detection and time synchronization are separate functions. Field I/O hardware may continue to detect state changes even when the common timing reference is missing or incorrect. The resulting event records may therefore exist without the expected timing relationship.

What is a practical way to check an NKST11-10 after installation?

Verify the physical connections first, then check the synchronization status of the associated INFI 90 hardware. Reviewing several newly generated SOE events and comparing their timestamps with known equipment actions is useful for confirming the timing path.