The Westinghouse 7379A31 (Model GO7QAW) is a high-reliability analog input/output interface card designed for use within the WDPF (Westinghouse Distributed Process Family) and Ovation control systems.
Product Parameters (Datasheet)
- Model Number: 7379A31
- Card Type: GO7QAW (Analog I/O)
- Firmware/Revision: P1.5
- Input Channels: Typically 8 or 16 differential/single-ended analog inputs
- Output Channels: 4 to 8 analog output channels (model specific)
- Signal Range: 4-20 mA, 1-5 V DC, 0-10 V DC (software or jumper configurable)
- A/D Resolution: 12-bit or 14-bit precision
- Isolation: Channel-to-channel and channel-to-logic galvanic isolation
- Power Supply: +5V DC, +/-15V DC (supplied via the system backplane)
- Compatibility: Westinghouse WDPF / Ovation Westnet II Data Highway
Country of Origin
This control system component was originally engineered and manufactured by Westinghouse Electric Corporation (Process Control Division) in the USA.
Application Fields
The 7379A31 card is primarily utilized in large-scale utility and industrial power environments:
- Fossil Fuel Power Plants: Managing boiler feed-water controls and turbine analog feedback.
- Nuclear Power Generation: Integrated into non-safety-critical balance-of-plant (BOP) control systems.
- Wastewater Treatment: Monitoring flow meters and controlling chemical injection pumps.
- Steel Mills: Regulating furnace temperatures and hydraulic pressure setpoints.
- Chemical Processing: Interfacing with pressure and level transmitters across the facility.
Product Usage Instructions
- Safety Precautions: Ensure the Q-Line or Ovation rack is powered down before inserting or removing the card. Wear an ESD wrist strap to protect the CMOS components.
- Jumper Settings: Check the onboard jumpers to ensure the input/output ranges (e.g., 4-20mA vs. 0-10V) match your field instrumentation requirements.
- Installation: Slide the card into the designated slot of the I/O chassis. Ensure the edge connector is fully seated before securing the front-panel thumb screws.
- Wiring: Connect the field signals to the corresponding terminal block. Use twisted-pair shielded cable and ensure the shield is grounded at only one end to prevent ground loops.
- Initialization: Upon system boot, the P1.5 firmware will undergo a self-test. Check the system diagnostics console for any “Card Missing” or “I/O Error” status messages.
Product Technical Description
The GO7QAW card acts as the bridge between the digital processing environment of the WDPF system and the analog reality of the industrial field. It converts incoming analog signals from sensors into digital data for the controller and converts digital commands back into analog currents to drive actuators. The P1.5 revision includes optimized filtering algorithms to reject 50/60 Hz line noise, ensuring stable readings even in electrically “noisy” power plant environments. The card features a “watchdog” timer that monitors the health of the onboard microprocessor, ensuring the outputs go to a safe state (Fail-Safe) in the event of a card-level failure.
Q&A (Common Questions)
Q: Is the 7379A31 compatible with modern Ovation systems? A: Yes, many Ovation systems retain backward compatibility with WDPF Q-Line cards through specialized interface modules, though it is primarily a legacy WDPF component.
Q: What does the “P1.5” designation mean? A: This refers to the specific firmware or hardware revision level. It is crucial to match revision levels when replacing cards in a redundant pair to ensure identical behavior.
Q: Can this card be repaired if a single channel fails? A: While component-level repair is possible for experts, most industrial facilities replace the entire card to maintain system certification and reliability.
Q: How do I calibrate the analog outputs? A: Calibration is typically performed through the system engineering station (e.g., WEStation) by adjusting the gain and offset parameters in the software database.
Similar Model Recommendations
- Westinghouse 1C31129G03 (Modern Ovation Analog Input)
- Westinghouse 7379A21 (Earlier revision of GO7QAW)
- Westinghouse 1C31132G01 (Ovation Analog Output Module)
- Westinghouse 7378A31 (Digital I/O variant)
- Westinghouse 1C31116G01 (HART compatible Analog Input)
For further technical data or availability of the Westinghouse 7379A31, please contact our sales department.
