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This ABB Bailey NHSS01 module controls hydraulic actuators with precision. It converts analog setpoints into current outputs for servo valves. This servo module ensures accurate position control for turbine steam valves.
Technical Specifications
The ABB Bailey NHSS01 measures 225 mm in length. Its width reaches 32 mm with a height of 175 mm. This servo module weighs approximately 0.72 kilograms. A single multilayer PCB holds all conditioning and drive components.
| Parameter | Specification |
|---|---|
| Brand | ABB Bailey |
| Full Model | ABB Bailey NHSS01 |
| Output Channels | 2 servo valve drivers |
| Output Signal | ±10V or 4-20 mA |
| Output Current | 0-200 mA per channel |
| Feedback Inputs | 2 LVDT channels |
| Control Loop | PID algorithm |
| Update Rate | 1 ms typical |
| Power Supply | 24V DC |
| Power Dissipation | 8 W maximum |
Design and Energy Storage
This unit stores minimal energy in small capacitors. Each output channel includes short-circuit protection. The onboard processor executes PID loops at 1 kHz frequency. Surface-mount technology boosts reliability in industrial environments. Furthermore, this servo module has LED indicators for valve status.
Installation and Connectivity
You can mount this module on a standard DIN rail. It accepts LVDT feedback signals via screw terminals. Servo valve cables connect directly to the output channels. Consequently, you complete the installation within a few minutes. Finally, DIP switches set the control mode for each channel.
Performance and Control Accuracy
This unit consumes only 8 watts during operation. Its 1 ms update rate ensures smooth valve positioning without hunting. Thus, you get precise control for steam turbine governor applications. The module provides 16-bit resolution on both outputs. This device also performs automatic dither generation to reduce valve stiction.
Typical Applications
Use this servo module for steam turbine valve position control. It also excels at hydraulic press and actuator regulation tasks. Many plants select this unit for hydro turbine wicket gate control. The compact module design saves valuable panel space effectively. Finally, onboard diagnostics alert you to valve driver faults immediately.