Description
Woodward 9907‑1200 CPC‑II Current‑to‑Pressure / Electro‑Hydraulic Converter
Product Brand & Model Title
Official Product Name: CPC‑II Current‑to‑Pressure / Electro‑Hydraulic Converter Brand: Woodward Model No: 9907‑1200 Product Grade: Industrial I/P converter for turbine & engine control systems, hazardous‑area qualified field control component
General Product Overview
The 9907‑1200 CPC‑II is a high‑reliability current‑to‑pressure converter designed for turbine, engine and generator control applications. It converts standard 4‑20 mA analog control signal from controllers into proportional pneumatic or hydraulic output pressure, to drive valve actuators, fuel valves and steam‑turbine governor devices. Built with rugged aluminum housing, it supports panel mounting or DIN‑rail installation. This unit delivers stable pressure output under wide‑range temperature and vibration conditions, widely deployed in power generation, oil‑gas and process‑industry turbine control loops.
Model Coding Definition
- 9907: Woodward CPC‑II series electro‑hydraulic / I/P converter product family
- 1200: Base hardware variant code for standard 4‑20 mA input, 0‑10 bar pressure output version
Note: Different suffix options define supply‑pressure range, output pressure range, hazardous‑area certification and mounting configurations.
WOODWARD 9907-1200
Technical Specifications
Electrical Parameters
‑ Input Signal: 4‑20 mA DC standard analog control signal ‑ Power Supply: 24 VDC (±10 %), max 1 A consumption ‑ Input Impedance: Loop‑compatible for standard DCS / PLC analog output channels
Pneumatic / Hydraulic Performance
‑ Input Supply Pressure: 1.4‑2.1 bar (20‑30 psi) for pneumatic supply ‑ Output Pressure Range: 0‑10 bar (0‑145 psi) standard; alternative 3‑15 psi pneumatic range available ‑ Accuracy: ±0.5 % of full span ‑ Hysteresis & Repeatability: ≤0.25 % FS ‑ Response Characteristic: Linear proportional conversion between current input and pressure output
Environmental Specifications
‑ Operating Temperature: −40 ℃ ~ +85 ℃ ‑ Storage Temperature: −45 ℃ ~ +90 ℃ ‑ Relative Humidity: 5 %‑95 %, non‑condensing ‑ Vibration resistance: Complies with turbine‑skid vibration levels for engine‑mounted installation ‑ Ingress Rating: IP54 (with proper cable‑gland assembly) ‑ Housing Material: Corrosion‑resistant aluminum alloy
Mechanical & Certification
‑ Mounting: Panel‑mount or standard 35 mm DIN rail mounting ‑ Dimensions (H×W×D): 163 mm × 38 mm × 58 mm ‑ Weight: Approx. 0.72 kg ‑ Certifications: CE, UL; Class 1 Div 2 hazardous‑location compliance for power‑generation equipment
Core Product Features
- 4‑20 mA to pressure conversion: Translates control‑system analog command into precise pneumatic/hydraulic pressure for valve actuation.
- Wide operating temperature range: −40 ℃ up to +85 ℃, suitable for outdoor turbine‑skid and engine‑room environments.
- Compact dual‑mount design: Supports both panel installation and DIN‑rail rack mounting for flexible cabinet layout.
- High conversion accuracy: ±0.5 % full‑span accuracy guarantees precise fuel‑valve and governor control for turbines and engines.
- Rugged aluminum enclosure: Resists vibration, shock and moderate corrosive atmosphere in power‑plant sites.
- Hazardous‑area suitability: Class 1 Div 2 certified for gas‑turbine and oil‑gas hazardous‑zone installations.
- Loop‑friendly electrical design: Works directly with standard PLC / DCS 4‑20 mA analog output modules without extra signal conditioning.
- Field‑adjustable calibration: Zero‑span calibration accessible for on‑site commissioning and performance trimming.
Application Fields
‑ Power generation: Gas‑turbine & steam‑turbine governor control, fuel‑valve actuation ‑ Oil & gas industry: Engine‑driven compressor control, generator set control loops ‑ Petrochemical plants: Turbine‑driven process compressor control ‑ Industrial engine systems: Diesel / gas engine speed‑control actuator driving ‑ Combined‑cycle power facilities: Turbine‑skid I/P conversion for fuel‑control loops ‑ Retrofit projects: Replacement spare for existing Woodward turbine‑control installations
WOODWARD 9907-1200
Product Advantages & Value
‑ Purpose‑built for Woodward turbine‑control ecosystem, stable performance for critical governor loops. ‑ Wide temperature capability adapts to unconditioned turbine‑skid environments. ‑ Dual mounting options simplify new‑build and retrofit cabinet engineering. ‑ High‑accuracy conversion improves turbine speed‑control stability. ‑ Hazardous‑area approvals satisfy global power‑project safety requirements. ‑ Direct compatibility with standard 4‑20 mA automation loops minimizes system integration effort.
Compatible System & Interface Description
‑ Compatible Controllers: Woodward 505, 505E, ProAct series turbine governors, third‑party DCS/PLC analog output cards ‑ Electrical Interface: Screw terminals for 4‑20 mA signal and 24 VDC power wiring ‑ Pneumatic Interface: Standard NPT‑style pressure ports for supply‑pressure input and controlled‑pressure output ‑ Mounting Options: 35 mm DIN‑rail or panel‑mount installation ‑ Calibration: Local zero‑span adjustment for on‑site commissioning
Related Recommended Products
- 9907‑1100: CPC‑II series I/P converter, alternative pressure‑range variant
- Woodward 505E: Turbine digital governor controller, matched control source for 9907‑1200
- 9908‑1000: Electro‑hydraulic actuator for turbine fuel‑valve driving
- CPC‑II calibration tool: Hand‑held calibration device for field zero‑span adjustment
- Woodward 8200‑1002: Turbine‑control pressure‑regulating accessory
- 9907‑1210: CPC‑II high‑temperature enhanced‑version converter
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