9907-1200 Woodward CPC-II Converter

• Brand
  Woodward
• Model
  9907-1200
• Product Name
  CPC-II Current-to-Pressure Electrohydraulic Converter
• Place of Origin
  United States
• HS Code
  85437099
• Dimensions
  356 mm × 279 mm × 102 mm
• Weight
  4.13 kg
• Operating Temperature
  -40 °C to +70 °C
• Storage Temperature
  -40 °C to +85 °C
• Power Supply
  24 VDC
• Warranty
  12 month
• Product Status
  New and original

Backed by abundant in-stock inventory and nearly 20 years of industry experience, our company stands as a leading player in the industrial control sector.We offer an extensive range of industrial control products covering numerous models. Should you have any other requirements, please feel free to contact us, and we will respond to you promptly.

Our main brand:

1.ABB's module cards, touch screens, controllers, etc., such as PP846 touch screen, IGCT starting with 5SHY, PM starting controller, AI, DO starting input/output module, SP starting Bailey module, etc

2.GE's module card CPUs, such as VMIC starter, IS200, IS215, IS400, IS420 series, etc,

3.Emerson's card components and EPRO probes, Westinghouse 1C series, Honeywell CC series, Schneider 140 series, Envision full series, Bentley 3500 series, Rexroth motors and drives, and Foxboro small modules.

Power Supply Specification

Nominal operating supply voltage: 24 VDC

Permitted operating voltage range: 18 VDC ~ 32 VDC

Maximum power consumption current: 1 A

Stable DC power source with low ripple is recommended to avoid unstable converter operation.

Control Input Signal

Standard setpoint control input signal: 4–20 mA DC

The device supports both single-channel and redundant dual-channel 4–20mA control input configurations to improve system reliability.

The received current signal will be proportionally converted into corresponding hydraulic output pressure to regulate turbine control valves.

1. Pre-commissioning Inspection & Safety Preparation

Isolate the turbine control circuit and implement lockout-tagout for relevant hydraulic and power circuits to establish a safe working environment.

Carry out mechanical mounting inspection to ensure the converter is rigidly installed free of vibration, and all hydraulic joints remain leak-tight.

Inspect every wiring terminal; verify the 24 VDC power wiring and 4–20 mA command signal cables are securely terminated. Ensure proper cable shielding and earthing are implemented.

Confirm the supplied hydraulic pressure complies with rated specifications, and clear contaminants inside pipelines to prevent internal blockages within the unit.

Get all required instruments ready, including a multimeter, CPC-II Service Tool software, communication cable and pressure gauge.

2. Power-on Check & Self-diagnosis

Supply 24 VDC power within the permitted operating range of 18 VDC ~ 32 VDC to the converter.

Monitor the startup self-test sequence and check status indicators to confirm no hardware fault alarms are activated.

Establish communication with the converter using CPC-II Service Tool, then load factory default or previously saved parameter configurations.

Analyze device diagnostic data to detect early issues such as wiring mistakes, power supply abnormalities and communication faults.

3. Signal Loop Verification

Perform validation tests on the command signal loop originating from the main control system.

Output standard 4 mA and 20 mA signals sequentially from the DCS or controller.

Measure the current values received at the input terminals of 9907-1200, verifying precise signal transmission without interference.

For units equipped with redundant input setup, execute channel switching tests between primary and standby 4–20 mA loops to validate redundant switching capability.

4. Zero and Span Calibration

Transmit the minimum 4 mA command signal (zero point). Record the corresponding hydraulic output pressure, then modify zero parameters via the service tool to match the target low-pressure setting.

Transmit the maximum 20 mA command signal (span point). Record the hydraulic output pressure and adjust span parameters to achieve the designated full-scale pressure output.

Iterate zero and span calibration multiple times until a stable linear relationship between the 4–20 mA input signal and hydraulic output pressure is obtained.

Test intermediate signal points (8 mA, 12 mA, 16 mA) to evaluate the overall linearity characteristic.

5. Dynamic Response Tuning

Adjust the command signal in small incremental steps while observing the dynamic variation of hydraulic output pressure.

Tune proportional gain and dynamic response parameters via the service tool in accordance with the characteristics of the turbine actuator.

Rectify abnormal operating behaviours including pressure oscillation, sustained hunting and sluggish response.

Avoid over-high gain values that may lead to system instability, and maintain steady, fast tracking of pressure outputs.

6. Functional & Interlock Test

Implement full-stroke testing on the matched turbine control valve. Confirm the valve opens and closes proportionally in response to the 4–20 mA command.

Test integrated alarm functions, including alarms triggered by signal loss, power failure and abnormal output pressure.

Validate the transmission of pressure feedback if a 4–20 mA feedback signal to the DCS has been configured.

7. On-line Trial Operation

Remove isolation arrangements and restore standard hydraulic supply conditions.

Engage the converter into closed-loop control linked with the turbine governing system.

Start trial operation under no-load status; continuously monitor command signals, output pressure and valve position feedback.

Keep observing the unit during continuous operation for signal drift, pressure fluctuations and unusual mechanical noise.

8. Post-commissioning Record & Documentation

Store the finalized parameter set within CPC-II Service Tool and create backups of all configuration files.

Document all calibrated zero/span settings, dynamic tuning parameters and measured test data.

Mark wiring cables and hydraulic pipelines with clear identification labels. Complete the formal commissioning report prior to project handover.

Frequently Asked Questions (FAQ)

1.How fast will you reply to my inquiry?

We process all inquiries efficiently and will respond promptly once we receive your message.

2.Do you carry large inventory of industrial control parts?

We maintain massive ready stock of mainstream automation spare parts to shorten lead times.

3.Can you source discontinued or obsolete PLC & DCS modules?

Absolutely.
We specialize in sourcing hard-to-find, obsolete and out-of-production industrial control components.

4.Do you inspect goods before shipment?

Every product undergoes thorough inspection before packing and dispatch.

5.Can you ship orders worldwide?

We provide global shipping with flexible logistics for urgent and regular orders.

6.What payment methods are available?

We accept multiple secure payment options. Please contact our sales team for detailed terms