The 2840A21H08 is a Westinghouse WDPF 8QAO analog output board used in Westinghouse Distributed Processing Family DCS installations at power generation facilities. The 8QAO provides analog output channels for driving control valves, positioners, and other analog field devices from the WDPF processing unit, enabling precise closed-loop regulation of process variables across boiler, turbine, and balance-of-plant control loops. The WDPF system connects individual processing units over plant data highways, supporting both WEStation RISC-based operator workstations and Multibus-based processing configurations. Powergenics stocks and repairs Westinghouse WDPF I/O boards including the 2840A21H08, providing tested replacements for facilities maintaining legacy WDPF distributed control system installations. Call 800-861-9773 for pricing and availability.
Westinghouse
2840A21H08
8QAO
Technical Specification
The Westinghouse WDPF control system consists of individual processing units which communicate over networks or “highways”. Two basic types of communications are available:
• WEStation which is based on a RISC workstation with added Westinghouse hardware supporting highway communication.
• Multibus-based communications based on Westinghouse boards including the functional processor and highway communication hardware.
Printed Circuit Board
Need This Board Repaired or Sourced?
Powergenics repairs and supplies industrial circuit boards with a 3-year warranty and 98% success rate. We are SDVOSB certified and hold a GSA contract. Rush turnaround available.
