Products > E > Electronic Controls > Industrial Turbine > Steam Turbine Controls > Peak200 Digital Control for Steam Turbines

Peak200 Steam Turbine Control


The Peak200 control functions as a turbine control, system sequencer, operator control panel, and first-out indicator. This encompassing design minimizes external system devices as well as system installation, wiring, and troubleshooting.

Designed to operate small single valve, or single valve-rack industrial steam turbines, this cost-effective steam turbine controller includes specifically designed algorithms and logic to start, stop, control, and protect small industrial steam turbines or turbo-expanders driving compressors, pumps, or industrial fans. 

The Peak200 control’s unique PID structure makes it ideal for applications where it is required to control steam plant parameters like turbine speed, turbine load, turbine inlet header pressure, turbine exhaust header pressure, pump flow, or compressor discharge or suction pressure. 


 Operator Control Panel (OCP)

The Peak200 controller’s user-friendly front panel serves as both a programming station and operator control panel (OCP). This front panel allows engineers to access and program the unit to specific plant requirements and lets plant operators easily start/stop the turbine and enable/disable any control mode. Password security is used to protect all unit program mode settings. The controller’s 5” graphical display allows operators to view actual and setpoint values from the same screen, simplifying turbine operation.


Distributed Control System (DCS) Node

Designed to function as a plant Distributed Control System node, the Peak200 can interface with the plant DCS via hardwired input/output signals or serial or Ethernet communications. Alternatively, the controller can be configured to accept a remote turbine speed/load demand from the plant DCS via a 4-20mA signal, discrete raise/lower commands, or Ethernet or serial Modbus communications.

With the capability to monitor and control all turbine and driven equipment based functions (i.e., bearing temperatures, vibration levels, control oil levels, etc.), the Peak200 is also a cost-effective compressor control/protection device as well as a plant DCS monitoring node.


Peak200 control capabilities include:

  • Turbine speed/load control
  • Inlet header pressure control
  • Turbine inlet/exhaust header pressure control
  • Pump flow/pressure control
  • Compressor flow/pressure control  


  • Field configurable
  • Integrated graphical operator control panel
  • Simple to install, configure and operate
  • User-friendly menu format
  • Critical speed avoidance (1 speed band)
  • Manual or auto start sequence
  • Valve limiter
  • Security (program is password protected)
  • Adaptive speed/load PID dynamics
  • First-Out indication (alarms & shutdowns)
  • Peak speed indication for overspeed trip
  • Remote analog setpoints for Speed/Load & Cascade
  • Bearing temperature monitoring/alarms/trips
  • Vibration monitoring/alarms/trips
  • Real-time clock synchronization via SNTP
  • Ethernet and serial communications
  • Same form-fit-function as previous Peak150 controller
  • Bulkhead and panel mount versions available
  • Sulfur-resistant conformal coating
  • Certified for Hazardous Locations


To enhance the usability of the Peak200 controller, you might consider purchasing these options: 

LinkNet-HT Modules – Used to apply Woodward distributed I/O modules to extend the Peak200 controller’s input and output channels.

Vibration Sensor Kit – Optionally, users can apply 4-20mA accelerometer sensors with the Peak200 to monitor unit vibration levels and alarm and trip on high vibration events. Refer to product manual for related kit part numbers.

RemoteView - Woodward’s RemoteView software program once installed on a computer or touch panel can be used as an engineering workstation and or remote operator control panel.  

Stored Trend/Log File Service Tool – Woodward’s Control Assistant software service tool can be used to view real-time trends, saved trend files, upload and download the Peak200 control’s configuration files and alarm/trip logs.


  • Power:  LV models: 18-36 Vdc / HV models: 88-264 Vac & 90-150 Vdc (50 watts max)
  • Speed: 2 passive MPUs (10-35,000 Hz)
  • Discrete Inputs: 8 configurable contact inputs*
  • Analog Inputs: 4 configurable 4-20 mA inputs*



  • Valve/Actuator Drivers: 1 actuator output, 4-20 mA or 20-200 mA
  • Discrete Outputs: 4 relay outputs
    (24 Vdc @ 2 A, Form-C contacts)*
  • Analog Outputs: 3 programmable 4-20 mA current outputs**



  • Ethernet: 2 ports (Modbus TCP or OPC protocols)
  • Serial: 1 Modbus port (ASCII or RTU) comm ports (RS-232 or RS-485 compatible)
  • CAN: 2 ports (LinkNet-HT comm protocol)


 (*) Optionally 16 additional inputs via LinkNet-HT module

(**) Optionally 2 additional outputs via LinkNet-HT modules


  • Ambient Air Temperature Range: -20 °C to +65 °C (-4 °F to 149 °F)
  • Humidity: Lloyd's ENV2 test #1
  • Dry Heat: Lloyd's ENV3
  • Salt Fog: US MIL-STD-810, method 509.2, procedure 1
  • Shock: Meets US MIL-STD-810C, method 516.2-1, procedure 1B
  • Vibration: Lloyd's ENV2 test #1

Pollution Resistance

  • Particulate Pollution Resistance: IEC 664-1 Pollution Degree 2 (normally only non-conductive pollution occurs)
  • IEC 60068-2-60: 1995 Part 2.60 Methods 1 and 4 (Flowing Mixed Gas Corrosion Test) 
  • Gaseous Pollution Resistance: Module conformal coating withstands NO2, CO2, SO2, and H2S gases 
  • Will withstand levels typical of telecommunications and computer installations as defined by Battelle Labs Class III (between IEC60721-3-3 classification 3C1 and 3C2, light industrial to urban industrial, heavy traffic)