Product Overview
The Westinghouse 7379A21G01 is a Q‑Line QAV analog input circuit board for Emerson Ovation distributed control and turbine‑generator control systems. It features six independent voltage‑to‑frequency converter channels to acquire low‑level analog field signals, convert them into multiplexed 13‑bit digital data and transmit data to the DIOB controller board. On‑board temperature sensor provides cold‑junction compensation for accurate measurement under varying cabinet temperature conditions. Widely deployed in legacy power plant DCS and turbine control retrofit projects.
Series
Q‑Line QAV series analog input point boards, designed for Ovation system field signal acquisition for power generation process control.
Product Features
- Six individually isolated analog input channels with transformer‑based galvanic isolation
- Voltage‑to‑frequency conversion architecture for reliable low‑level signal measurement
- 13‑bit multiplexed digital output to DIOB controller backplane
- Built‑in on‑card temperature sensor for automatic temperature compensation
- Supports automatic offset and gain calibration with programmable calibration constants
- Compatible with both 50 Hz and 60 Hz power‑line frequency environments
- Standard rack slot‑mount form factor for Ovation Q‑Line card cages
- Robust industrial PCB construction for continuous 24/7 power‑plant operation
- Designed for signal acquisition from transducers, thermocouples and process transmitters
Product Parameters
| Item | Value |
|---|---|
| Part Number | 7379A21G01 |
| Module Type | QAV Analog Input Board |
| Input Channels | 6 isolated channels |
| Data Resolution | 13‑bit digital output |
| Isolation Method | Transformer galvanic isolation |
| Backplane Interface | Multiplexed to DIOB controller |
| Mounting | Rack slot‑mount in Q‑Line card cage |
| Protection Class | IP20 (for cabinet‑only installation) |
| Operating Temperature | -10 °C ~ +60 °C |
| Storage Temperature | -40 °C ~ +85 °C |
| Origin | USA |
Product Specifications
- Requires mating DIOB controller and Q‑Line system backplane for full operation
- Channel 6 incorporates on‑board temperature sensing for compensation function
- Not hot‑swappable; power must be removed before card insertion or removal
- Optimized for low‑mV range process signals from field transducers
- Hardware calibration constants stored on‑board for signal offset and gain correction
- Designed for installation inside standard industrial control cabinets
Function
Receives low‑level analog voltage signals from field process sensors. Each channel converts analog input signal to frequency signal, then converts to 13‑bit digital value. Digital data is multiplexed and sent across backplane to DIOB controller for further processing. On‑board temperature sensor compensates measurement drift caused by cabinet temperature variation, ensuring stable and accurate process readings for control logic.
Purpose
Capture analog field measurement signals and translate them into digital data for Ovation DCS and turbine‑generator control systems, enabling closed‑loop monitoring and regulation of power‑plant process variables.
Application Fields
Thermal power plant DCS control, turbine‑generator control systems, combined‑cycle power stations, fossil‑fuel power generation facilities, legacy Ovation system spare‑part replacement, power‑plant automation retrofitting projects.Image search keyword: Westinghouse 7379A21G01 Q‑Line QAV analog input board Ovation
