Woodward|9905-857|Peak 150 Digital Control Unit
Description
The Woodward 9905-857 is a Peak 150 digital control unit for steam turbines, designed for precise speed and load management.
Features
- Advanced digital speed control
- Triple modular redundancy for reliability
- Flexible I/O configuration
- Supports Modbus communication
Technical Specifications
Electrical
- Supply Voltage: 18–32 V DC
- Power Consumption: 20 W maximum
- Isolation: 1500 V DC input-to-output
Inputs
- Speed Inputs: 2 MPU or proximity probes
- Discrete Inputs: 16 channels, 24 V DC
- Analog Inputs: 4 channels, 4–20 mA
Outputs
- Analog Outputs: 2 channels, 4–20 mA
- Discrete Outputs: 8 relay outputs, 5 A at 250 V AC
- Actuator Output: 0–200 mA
Performance
- Speed Range: 0–20,000 rpm
- Resolution: 0.1 rpm
- Update Rate: 10 ms for speed control
Communication
- Protocols: Modbus RTU, TCP/IP
- Ports: 1 serial, 1 Ethernet
Physical
- Dimensions: 330 x 190 x 140 mm
- Weight: 3.2 kg
- Mounting: Bulkhead, low-voltage DC standard
Woodward|9905-857|Peak 150 Digital Control Unit



Woodward|9905-857|Peak 150 Digital Control Unit
Description
The Woodward 9905-857 is a Peak 150 digital control unit for steam turbines, designed for precise speed and load management.
Features
- Advanced digital speed control
- Triple modular redundancy for reliability
- Flexible I/O configuration
- Supports Modbus communication
Technical Specifications
Electrical
- Supply Voltage: 18–32 V DC
- Power Consumption: 20 W maximum
- Isolation: 1500 V DC input-to-output
Inputs
- Speed Inputs: 2 MPU or proximity probes
- Discrete Inputs: 16 channels, 24 V DC
- Analog Inputs: 4 channels, 4–20 mA
Outputs
- Analog Outputs: 2 channels, 4–20 mA
- Discrete Outputs: 8 relay outputs, 5 A at 250 V AC
- Actuator Output: 0–200 mA
Performance
- Speed Range: 0–20,000 rpm
- Resolution: 0.1 rpm
- Update Rate: 10 ms for speed control
Communication
- Protocols: Modbus RTU, TCP/IP
- Ports: 1 serial, 1 Ethernet
Physical
- Dimensions: 330 x 190 x 140 mm
- Weight: 3.2 kg
- Mounting: Bulkhead, low-voltage DC standard