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- ABB Bailey
- NTHS03
- Hydraulic Servo Termination Unit
- Sweden (SE)
- 25.4 × 198.58 × 198.58 mm
- 0.3 kg
- Xiamen, China
- New & In Stock
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Product Overview
The ABB Bailey NTHS03 is an Infi 90 Hydraulic Servo Termination Unit used as the field interface for hydraulic servo-related control circuits within compatible Infi 90 automation systems. It provides the physical termination point between the control-system interface and the wiring associated with hydraulic actuator or servo equipment.
In industrial control applications, hydraulic servo systems are used where a controller must regulate the position or movement of equipment through hydraulic actuation. The termination unit organizes the electrical connections associated with these circuits so that control signals can be routed between the Infi 90 system and the external hydraulic control equipment.
The NTHS03 belongs to the termination and interface layer of the control architecture. It does not independently execute the servo control algorithm or generate the hydraulic force. Instead, it supports the electrical connection required by the active control and I/O components that manage the hydraulic servo function.
For maintenance personnel, the termination unit is relevant when investigating missing actuator commands, abnormal servo responses, or field wiring problems. The NTHS03 should be evaluated together with the associated Infi 90 control module, field wiring, hydraulic servo interface, and actuator.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | ABB Bailey |
| Model | NTHS03 |
| Product Family | Infi 90 |
| Product Type | Hydraulic Servo Termination Unit |
| Primary Function | Hydraulic servo control circuit termination |
| System Role | Hydraulic servo field interface |
| Application | Industrial process control and hydraulic actuation |
| Dimensions | 25.4 × 198.58 × 198.58 mm |
| Weight | 0.3 kg |
Product Features
- Infi 90 Hydraulic Servo Termination Unit
- Provides a dedicated connection interface for hydraulic servo-related circuits
- Organizes field wiring between control-system equipment and hydraulic servo equipment
- Supports integration of hydraulic actuation into industrial control architectures
- Suitable for process-control and machinery applications using hydraulic positioning
- Separates field termination functions from active control processing
- Useful for commissioning, wiring inspection, and maintenance of hydraulic servo circuits
- Suitable for compatible ABB Bailey Infi 90 installations
Working Principle
The NTHS03 provides the electrical termination path for signals associated with a hydraulic servo control circuit. Commands generated by the active Infi 90 control system are routed through the appropriate interface and termination connections toward the hydraulic servo equipment.
Infi 90 Control System → Servo Control Interface → NTHS03 → Hydraulic Servo Equipment → Actuator / Process Equipment
The termination unit itself does not perform the closed-loop control calculation. The active control system determines the required servo command based on process conditions, feedback, and configured control logic. The NTHS03 maintains the physical connection through which the relevant control and interface signals are transferred.
Feedback from the hydraulic servo equipment can travel through the corresponding field interface toward the Infi 90 control system. This allows the controller to compare commanded and actual operating conditions where the complete application includes feedback-based servo control.
Role in an Infi 90 Hydraulic Servo Control Architecture
The NTHS03 occupies the field termination layer of an Infi 90 hydraulic servo control arrangement. It connects the control-system interface with the external hydraulic servo circuit while leaving control calculations and process decisions to the active automation hardware.
Infi 90 Controller → Servo Control Module → NTHS03 → Hydraulic Servo Interface → Actuator → Process Equipment → Feedback
| System Element | Function |
|---|---|
| Infi 90 Controller | Executes application and process-control logic |
| Servo Control Module | Generates or processes the required hydraulic servo signals |
| NTHS03 | Provides hydraulic servo circuit termination |
| Hydraulic Servo Interface | Converts or interfaces electrical commands with hydraulic equipment |
| Hydraulic Actuator | Produces the required mechanical movement |
| Position / Process Feedback | Reports actual equipment conditions to the control system |
| Process Equipment | Performs the controlled industrial operation |
The termination layer makes the field-side wiring easier to identify and service without confusing it with the active controller or servo-processing functions.
Industrial Applications
| Application | Typical Use |
|---|---|
| Turbine Control | Interface for hydraulic actuator control circuits |
| Power Generation | Hydraulic positioning of plant equipment |
| Process Control | Servo-based regulation of process machinery |
| Valve Actuation | Electrical interface to hydraulic valve actuators |
| Governor Systems | Hydraulic control of speed or position-related equipment |
| Industrial Machinery | Hydraulic movement and positioning control |
| Rotating Equipment | Servo-assisted actuator control |
| Large Process Plants | Field termination for hydraulic control equipment |
Installation and Maintenance
- Verify that the NTHS03 matches the intended Infi 90 hydraulic servo control arrangement before installation.
- Review the applicable system drawings and identify all wiring associated with the termination unit.
- Isolate the relevant control and field circuits before disconnecting the existing termination connections.
- Label each conductor before removing or transferring field wiring.
- Inspect the termination unit and terminal connections for physical damage or contamination.
- Confirm that the mounting arrangement securely supports the unit within the control cabinet.
- Check every terminal assignment against the approved wiring documentation before reconnecting conductors.
- Inspect field wiring for loose connections, damaged insulation, or mechanical stress.
- Verify that the associated servo control module and hydraulic interface are correctly connected.
- Check signal continuity where required before energizing the hydraulic control circuit.
- Test command and feedback signals under controlled commissioning conditions.
- After replacement, perform a complete functional test of the hydraulic servo control loop before returning the equipment to normal service.
Compatible System Components
| Component | Function |
|---|---|
| ABB Bailey Infi 90 Controller | Executes process and control logic |
| Hydraulic Servo Control Module | Processes servo commands and control signals |
| NTHS03 | Terminates hydraulic servo-related field circuits |
| Servo Interface Equipment | Interfaces electrical signals with hydraulic equipment |
| Hydraulic Servo Valve | Regulates hydraulic flow for actuator movement |
| Hydraulic Actuator | Converts hydraulic energy into mechanical movement |
| Position Feedback Device | Reports actuator or equipment position |
| Field Wiring | Carries control and feedback signals |
| Engineering Station | Supports configuration and diagnostics |
Recommended Related Models
| Model / Product Family | Product Type | Typical Application |
|---|---|---|
| ABB Bailey NTHS03 | Hydraulic Servo Termination Unit | Infi 90 hydraulic servo interface |
| ABB Bailey NTCS01 | Control I/O Termination Unit | Infi 90 control-system field interfacing |
| ABB Bailey NTCS02 | Control I/O Termination Unit | Infi 90 control-system field interfacing |
| ABB Bailey NTCS04 | Control Station Termination Unit | Infi 90 control-system interface |
| ABB Bailey NTDI02 | Digital I/O Termination Unit | Infi 90 digital field signal termination |
| ABB Bailey NTDO02 | Digital Output Termination Unit | Infi 90 discrete output field connection |
| ABB Bailey NTCU01 | Serial Interface Termination Unit | Infi 90 serial communication interface |
| ABB Bailey NTCF22 | Fiber Optic Communication Termination Unit | Infi 90 fiber communication interface |
Key Advantages
- Provides a dedicated termination interface for hydraulic servo circuits.
- Organizes servo-related field wiring within an Infi 90 control installation.
- Separates physical field connections from active servo-control processing.
- Supports maintenance and troubleshooting of hydraulic actuator signal paths.
- Suitable for industrial equipment requiring electrically controlled hydraulic actuation.
- Integrates into compatible ABB Bailey Infi 90 control architectures.
Technical FAQs
What type of signals are associated with the NTHS03?
The NTHS03 is associated with the field termination of hydraulic servo control circuits. The exact signal arrangement depends on the connected Infi 90 control hardware and the hydraulic servo application, so terminal assignments should be verified from the applicable system documentation.
Does the NTHS03 perform hydraulic servo control by itself?
No. The NTHS03 is a termination interface. The active Infi 90 control hardware and associated servo interface perform the control and signal-processing functions required by the application.
What can cause an actuator command to fail even when the Infi 90 controller is operating normally?
A problem may exist in the termination wiring, field interface, hydraulic servo equipment, actuator, or feedback path. Checking the command signal progressively from the controller through the NTHS03 and toward the hydraulic equipment can help locate the fault.
Why should the feedback path be checked after replacing the NTHS03?
Hydraulic servo applications often depend on the relationship between commanded and actual actuator conditions. Incorrect terminal assignment or a disturbed feedback connection can therefore produce an abnormal control response even when the controller itself is functioning correctly.