3A99114G03
Part Number: 3A99114G03 (QRD Universal Analog Input Card), manufactured by Westinghouse/Emerson as part of the Q-Line series for legacy WDPF DEH turbine control system. The suffix G denotes factory-assembled PCB version. This card is pin-to-pin compatible with G01, G02 and G04 variants within the same QRD product family. It works cooperatively with QSR(3A99101G01/G02), QRS(3A99108G01) and QRF(3A99109G01) modules to build a complete turbine measurement and servo control group, widely installed in VME racks of thermal and nuclear power plant EH control cabinets. Original OEM manufacturing has been permanently discontinued. Available inventory consists of fully inspected refurbished modules and pre-tested used original spare parts.
Description
1. Product Overview
Part Number: 3A99114G03 (QRD Universal Analog Input Card), manufactured by Westinghouse/Emerson as part of the Q-Line series for legacy WDPF DEH turbine control system. The suffix G denotes factory-assembled PCB version. This card is pin-to-pin compatible with G01, G02 and G04 variants within the same QRD product family. It works cooperatively with QSR(3A99101G01/G02), QRS(3A99108G01) and QRF(3A99109G01) modules to build a complete turbine measurement and servo control group, widely installed in VME racks of thermal and nuclear power plant EH control cabinets. Original OEM manufacturing has been permanently discontinued. Available inventory consists of fully inspected refurbished modules and pre-tested used original spare parts.
2. Core Function and Channel Specifications
This is a multi-range universal analog signal conditioning and A/D conversion board. It accepts multiple industry-standard input signals including 4–20mA DC, 0–5VDC and 0–10VDC analog signals. On-board jumpers allow field configuration for different input ranges. The card filters, amplifies and converts raw field signals from lube oil pressure, equipment vibration and auxiliary process parameters into digital data before transmitting to DPU main controller via VME bus. While QRF is dedicated for PT100 RTD temperature measurement, QRD is designed for general-purpose process analog acquisition.
Channel layout: 4 isolated independent analog input channels with high-precision reference source and anti-aliasing pre-filter circuits.
Interface: Standard VME backplane bus for power feed and digital data communication; front-panel test terminals support on-site zero and span offline calibration.
3. Electrical and Environmental Specifications
Power requirement: +5VDC and ±12VDC supplied from control crate backplane power module.
Operating temperature: 0℃ ~ +55℃ for continuous cabinet operation; storage temperature: -40℃ ~ +85℃.
Relative humidity: 5%~95% RH non-condensing, installation environment free of corrosive gas.
Optimized PCB shielding and multi-stage EMI filter circuits to suppress electrical noise from cabinet contactors and variable frequency drives, compliant with CE industrial control standards.
4. System Matching and Application
QRD 3A99114G03 is mechanically and electrically interchangeable with other QRD revisions without cabinet wiring modification when replacing faulty modules. Together with the Q-Line servo and signal conditioning cards, it forms integrated DEH measurement control rack. Typical applications include spare replacement during unit overhaul, retrofit upgrade of aging WDPF DCS system and emergency on-site breakdown maintenance for turbine auxiliary analog measurement loops such as hydraulic oil pressure and boiler feedwater pump process signals.
5. Supply & Delivery Information
Brand new factory-original parts are no longer available globally. In-stock products are fully tested refurbished cards with formal warranty and inspected second-hand original spares. Standard delivery lead time is 2~3 working weeks; expedited global shipment via DHL, UPS or FedEx is available for urgent emergency maintenance orders. Professional board repair service is provided with standard repair cycle of 2~4 weeks upon customer request.
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