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- ABB Bailey
- NKAS11-15
- Analog Slave Termination Unit Cable
- Sweden (SE)
- 5 feet
- 3 kg
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Product Overview
The ABB Bailey NKAS11-15 is an INFI 90 Analog Slave Termination Unit Cable used for connecting compatible analog slave termination equipment within an ABB Bailey INFI 90 control system. It forms part of the signal interconnection between system termination hardware and the associated control-system interface.
In a typical INFI 90 installation, termination units provide the connection point between field wiring and the control-system I/O structure. The NKAS11-15 cable is used where the termination unit must be connected to the corresponding system hardware through a dedicated cable assembly. This arrangement helps keep field wiring organized while allowing the termination hardware to remain separated from the controller or I/O electronics.
The cable is intended for use with compatible Bailey system components, so connector type, mating hardware, signal assignment, and system configuration should be verified before replacement.
Technical Specifications
| ParameterSpecification | Value |
|---|---|
| Manufacturer | ABB Bailey |
| Model | NKAS11-15 |
| Product Family | INFI 90 |
| Product Type | Analog Slave Termination Unit Cable |
| Application | Analog I/O signal interconnection |
| System | INFI 90 |
| Cable Length | 5 feet |
| Shipping Weight | 3 kg |
Product Features
- Intended for ABB Bailey INFI 90 analog termination applications.
- Connects compatible analog slave termination equipment with associated system hardware.
- Supports organized signal routing between termination and control-system components.
- Suitable for maintenance and replacement of existing INFI 90 installations.
- Provides a dedicated cable connection for compatible termination-unit hardware.
- Useful when maintaining the original wiring architecture of legacy Bailey control systems.
Working Principle
The NKAS11-15 functions as a signal interconnection cable rather than an active control module. Its primary task is to carry the electrical connections between compatible analog slave termination equipment and the corresponding INFI 90 system interface.
During normal operation, analog field signals are brought into the termination assembly, where the field wiring is organized and connected to the control-system interface. The NKAS11-15 provides the cable path between the termination hardware and the associated system equipment, allowing the analog signal connections to reach the appropriate I/O circuitry.
Because the cable is passive, signal integrity depends on correct connector mating, proper cable routing, and compatibility with the connected INFI 90 hardware. A damaged or incorrectly matched cable can result in missing channels, intermittent signals, or communication problems at the connected analog I/O interface.
Role in a INFI 90 Analog I/O Control Architecture
| System ElementFunction | |
|---|---|
| Field Analog Devices | Generate process measurements such as pressure, temperature, flow, or level signals |
| Termination Unit | Provides an organized interface between field wiring and the control-system I/O |
| NKAS11-15 Cable | Carries the required connections between compatible termination and system hardware |
| Analog I/O Module | Receives or processes analog field signals within the control system |
| INFI 90 Controller | Processes control data and executes configured control strategies |
| Operator Interface | Displays process values, alarms, and control information |
Industrial Applications
| ApplicationTypical Use | |
|---|---|
| Process Instrumentation | Connection of analog field signals to INFI 90 control equipment |
| Power Generation | Signal routing for plant instrumentation and process monitoring |
| Oil and Gas | Interconnection of analog termination equipment in control-system cabinets |
| Chemical Processing | Maintaining analog measurement paths within distributed control systems |
| Water Treatment | Signal connection for process measurement instruments |
| Legacy DCS Maintenance | Replacement of existing Bailey termination-unit cables |
Installation and Maintenance
- System Compatibility — Confirm that the NKAS11-15 is specified for the particular INFI 90 termination and I/O configuration before installation.
- Connector Verification — Check both cable ends and their mating connectors for correct fit, pin configuration, and physical condition.
- Power Isolation — Follow the plant’s approved isolation procedure before disconnecting or reconnecting control-system wiring.
- Cable Identification — Verify cable labels and connection points against the system drawings before removing the existing cable.
- Signal Routing — Route the cable along the intended cabinet path and keep it away from sources of excessive electrical interference where required.
- Connector Seating — Make sure each connector is fully engaged and secured to prevent intermittent signal connections.
- Pin Inspection — Check connector contacts for bent pins, oxidation, contamination, or other damage before installation.
- Cable Condition — Inspect the insulation and cable jacket for cuts, crushing, abrasion, or other physical damage.
- Bend Protection — Avoid sharp bends or excessive mechanical stress that could damage the cable or its connectors.
- Signal Verification — After installation, verify the affected analog channels from the termination point through to the corresponding I/O interface.
- Fault Diagnosis — If an analog channel is missing or unstable, inspect the cable and connectors before replacing active I/O hardware.
- Replacement Records — Record the cable model, connection points, and associated termination hardware after maintenance for future troubleshooting.
Related Components
| ComponentFunction | |
|---|---|
| ABB Bailey INFI 90 Analog Slave Termination Units | Provide termination and field wiring interfaces for analog signals |
| INFI 90 Analog I/O Modules | Process analog input or output signals |
| INFI 90 Controller Modules | Execute control logic using acquired process data |
| Bailey System Cables | Provide interconnections between control-system modules and termination equipment |
| INFI 90 Cabinet Hardware | Provides mounting and wiring infrastructure for the control system |
Recommended Related Models
| Model / Product FamilyProduct Type | Typical Application |
|---|---|
| ABB Bailey NKAS11 Series | Analog slave termination and related cable connections |
| ABB Bailey NKAS01 Series | INFI 90 system termination and signal-interface applications |
| ABB Bailey INFI 90 Analog I/O | Analog process signal acquisition and output |
| ABB Bailey INFI 90 Controllers | Process-control logic and system coordination |
| ABB Bailey INFI 90 System Cables | Interconnection between termination and control-system hardware |
Key Advantages
- Supports analog signal interconnection in INFI 90 systems.
- Maintains the established Bailey termination architecture.
- Suitable for replacement and maintenance applications.
- Simplifies the connection between termination equipment and system I/O.
- Supports organized cabinet-level signal routing.
Technical FAQs
What is the ABB Bailey NKAS11-15 used for?
The NKAS11-15 is an analog slave termination unit cable for compatible ABB Bailey INFI 90 systems. It provides the physical signal connection between the applicable termination hardware and associated control-system equipment.
Is the NKAS11-15 an active I/O module?
No. The NKAS11-15 is a passive cable assembly. It does not perform analog signal conversion, signal processing, or control logic. Those functions are handled by the connected termination and I/O hardware.
What should be checked before replacing an NKAS11-15?
Verify the exact model, cable length, connector configuration, mating equipment, and system wiring documentation. The cable should match the existing INFI 90 termination and I/O arrangement rather than being selected only by appearance.
What symptoms can indicate a problem with the NKAS11-15?
A damaged or poorly connected cable can contribute to missing analog channels, intermittent measurements, unstable signals, or loss of connection between termination equipment and the associated I/O interface. Connector condition and cable continuity should be checked before replacing active control hardware.