9907-1200 WOODWARD CPC-II Upgrade Program

Description

WOODWARD 9907-1200 CPC-II Current-to-Pressure Converter: Introduction and Technical Specifications
Brand and Model Information
The 9907-1200 is a high-performance Current-to-Pressure Converter (CPC-II) manufactured by Woodward, a global leader in control system solutions for industrial and energy markets. This module is specifically designed as an electrohydraulic pressure-regulating valve control for positioning single-acting steam turbine valve servos, and it belongs to Woodward’s CPC-II (Current-to-Pressure Converter, Generation II) series. The official part number is 9907-1200, and it is also referred to as the enhanced dynamics version for Zone 2 applications.

Physical and Power Specifications
The Woodward 9907-1200 features a compact and robust design with dimensions of approximately 163 × 38 × 58 mm (6.4 × 1.5 × 2.3 inches) and a net weight of 0.35 kg (0.77 lbs). It operates on a 24V DC power supply with a voltage range of 18 to 32 V DC and a steady-state current consumption of 1.5 A. The module has an IP20 protection rating and is designed for operation in harsh industrial environments with a temperature range of -40°C to 70°C. It also meets humidity standards of 20 to 55°C at 95% for 48 hours.
Input and Output Parameters
The 9907-1200 CPC-II is primarily designed to convert 4-20 mA DC current input signals into proportional output pressure signals. The standard output pressure range is 3-15 psi (0.2-1.0 bar), though it can also be configured for 0-10 bar (14.5-145 psi) depending on the specific application. The input signal is isolated, and the module provides a high level of accuracy at ±0.5% of span. For air supply, it requires a minimum of 20 psi and a maximum of 30 psi with an air consumption of 0.5 SCFM at 20 psi. Additionally, it features a two-line × 24 characters display for easy configuration and monitoring.
Core Features and Functionalities
The Woodward 9907-1200 incorporates several advanced features to ensure reliable and precise operation. It uses an accurate internal pressure sensor and a PID controller to regulate the positioning of single-acting steam turbine governor valves with exceptional resolution. One of its key advantages is its ability to solve oil contamination issues, which is one of the industry’s top reliability concerns affecting equipment uptime and performance. The module offers enhanced dynamics for faster response times and is available in a simplex configuration suitable for Zone 2 hazardous areas. It also features built-in diagnostic capabilities for easy troubleshooting and maintenance. The compact design facilitates easy installation and integration into existing systems, while its rugged construction ensures reliable operation in demanding industrial conditions.
Application Areas
The 9907-1200 CPC-II is primarily used in power generation applications as a critical component for controlling steam turbine valve servos and actuators. It is ideal for maintaining stable turbine speed and load control despite fluctuations in operating conditions. The module is also suitable for various other industrial automation tasks, including process control, valve positioning, and actuation systems in the energy, manufacturing, and infrastructure sectors. Its high accuracy and reliability make it particularly well-suited for mission-critical systems requiring precise control and minimal downtime.

9907-1200 WOODWARD PDF
9907-1200 WOODWARD

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