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- ABB Bailey
- NKHS03-25
- Hydraulic Servo Terminal Cable
- Sweden (SE)
- 25 feet
- 3 kg
- Xiamen, China
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Product Overview
The ABB Bailey NKHS03-25 Hydraulic Servo Terminal Cable is a pre-terminated industrial hydraulic servo signal cable used in ABB Bailey INFI 90 / Net 90 Distributed Control Systems (DCS). It provides a reliable and shielded connection between hydraulic servo modules and termination units, ensuring accurate signal transmission for actuator control in demanding industrial environments.
This model is the 25-foot (25 ft) version of the NKHS03 series, designed for longer routing distances between control cabinets and field-mounted hydraulic servo components.
It is widely used in closed-loop hydraulic servo control systems, where stable communication and precise feedback are essential for system performance and safety.
Technical Specifications
| Parameter | Details |
|---|---|
| Manufacturer | ABB (Bailey) |
| Model | NKHS03-25 |
| Product Type | Hydraulic Servo Terminal Cable |
| System Compatibility | ABB Bailey INFI 90 / Net 90 DCS |
| Function | Servo signal transmission between controller module and termination unit |
| Connected Modules | IMHSS / SPHSS hydraulic servo modules |
| Termination Side | NTHS / NTDI hydraulic interface units |
| Cable Length | 25 ft (7.62 m) |
| Signal Type | Analog control + feedback signals |
| Shielding | Industrial EMI-shielded construction |
| Installation Type | Pre-terminated servo cable assembly |
| Operating Temperature | -20°C to +70°C |
| Storage Temperature | -40°C to +85°C |
| Humidity Range | 5%–95% non-condensing |
| Shipping Weight | 3 kg |
Function and Working Principle
The ABB NKHS03-25 operates as a closed-loop hydraulic servo communication link.
Working principle:
- The control system generates hydraulic actuator command signals
- Signals are transmitted through the NKHS03-25 cable
- Shielding reduces electromagnetic interference during transmission
- Signals reach the termination unit (NTHS / NTDI series)
- Hydraulic actuators respond to control commands
- Feedback signals return through the same cable path for continuous correction
This ensures precise positioning, stable hydraulic response, and reliable closed-loop feedback control.
Role in Industrial Control Systems
Within ABB Bailey INFI 90 / Net 90 systems, the NKHS03-25 plays a key field-level connection role:
- Connects hydraulic servo modules to termination interfaces
- Supports long-distance cabinet-to-field wiring layouts
- Maintains signal integrity in high-noise industrial environments
- Enables precise closed-loop hydraulic actuator control
- Standardizes system wiring architecture for larger installations
It is a critical physical link in hydraulic servo control systems.
Industrial Applications
The ABB NKHS03-25 is widely used in:
- Power generation turbine control systems
- Oil and gas hydraulic control systems
- Petrochemical process automation systems
- Industrial hydraulic actuator systems
- Heavy machinery control systems
- ABB Bailey legacy DCS hydraulic servo loops
It is especially important in applications requiring high-precision motion control and stable feedback regulation.
Installation and System Integration
Proper installation ensures reliable performance:
- Installed between hydraulic servo module and termination unit
- 25 ft length supports long-distance routing between cabinets and field devices
- Requires proper shielding grounding at both ends
- Must be routed away from high-voltage and high-noise cables
- Installed within control cabinets or field conduit systems
- Used with IMHSS / SPHSS servo control modules
- Integrated into hydraulic closed-loop control architecture
Compatible System Components
The NKHS03-25 typically works with:
- ABB Bailey hydraulic servo modules (IMHSS / SPHSS series)
- NTHS01 / NTHS03 hydraulic termination units
- NTDI01 interface modules
- Hydraulic servo valves and actuators
- DCS controllers and processor modules
- Control cabinet grounding and shielding systems
- Signal conditioning modules (system dependent)
Together, these form a complete hydraulic servo control loop system.
Recommended Alternative Models
| Model | Type | Key Feature | Application |
|---|---|---|---|
| NKHS03-25 | Hydraulic servo cable | Standard 25 ft servo cable | Long-distance installations |
| NKHS03-20 | Hydraulic servo cable | 20 ft version | Medium-range layouts |
| NKHS03-15 | Hydraulic servo cable | 15 ft version | Compact systems |
| NKHS13-25 | Heavy-duty servo cable | Enhanced durability | Harsh environments |
| NTHS03 | Servo termination unit | Signal interface module | Servo system termination |
Key Advantages
- Stable hydraulic servo signal transmission over long distances
- High EMI resistance for industrial environments
- Supports precise closed-loop control performance
- 25 ft length ideal for large-scale system layouts
- Compatible with ABB Bailey hydraulic architectures
- Reduces signal loss and noise distortion
- Reliable operation in harsh industrial conditions
Technical FAQs
Q1: What is the main function of ABB NKHS03-25?
It transmits control and feedback signals between hydraulic servo modules and termination units.
Q2: Does it process signals?
No. It only provides physical signal transmission.
Q3: What systems use NKHS03-25?
It is used in ABB Bailey INFI 90 and Net 90 hydraulic servo systems.
Q4: Why use a 25 ft version?
It is designed for longer-distance wiring between control cabinets and field-mounted hydraulic equipment.
Conclusion
The ABB Bailey NKHS03-25 Hydraulic Servo Terminal Cable is a key component in ABB Bailey hydraulic control systems. It provides stable, shielded, and accurate signal transmission between servo modules and termination units.
Its role is essential for maintaining precise hydraulic actuator control, system stability, and reliable closed-loop performance in industrial automation environments such as power plants, petrochemical facilities, and heavy industrial systems.