1. Product Identification

• QSR:3A99101Gxx (Servo control board)

• QRS:3A99108G01

• QRF:3A99109G01 (RTD dedicated acquisition card)

2. Core Function Description

1. Collect field process analog signals (pressure, flow, displacement, auxiliary temperature) from turbine oil system, feedwater system, pump monitoring loop;

2. Onboard filtering, amplification, isolation and A/D conversion;

3. Transmit digital data to DPU main controller via standard VME backplane bus;

4. Supports partial 200Ω Platinum RTD auxiliary measurement besides standard voltage/current input (enhanced RTD compatibility than G03).

Channel Configuration

• 4 galvanic-isolated independent analog input channels;

• Onboard configurable jumpers to switch multiple input signal types:

  • DC Current: 4–20mA standard loop signal

  • DC Voltage: 0~5VDC, 0~10VDC, ±10VDC

  • Thermocouple: Type K, J, E, T with built-in cold junction compensation

  • Auxiliary: 200Ω Pt RTD partial channel input (unique upgrade for G04)

• Front panel reserved test terminals for zero/span field calibration offline.

3. Electrical Parameters

1. Power Supply: +5VDC, ±12VDC, powered by crate backplane power module;

2. A/D Conversion Resolution: 16-bit high precision;

3. Input Impedance: ≥1MΩ for voltage channel; ≤250Ω default sampling resistance for 4–20mA loop;

4. Isolation Rating: Each channel isolated ≥1500VAC between field side and backplane side.

4. Environmental Specifications

• Operating Temp: Continuous working 0℃ ~ +55℃ inside control cabinet;

• Storage Temp: -40℃ ~ +85℃;

• Humidity: 5%~95%RH, non-condensing, non-corrosive ambient gas required;

• EMC Performance: Enhanced multi-stage EMI filter & full PCB shielding on G04 revision, anti-interference for cabinet inverter, contactor noise, comply with CE industrial control standard.

5. Installation & Replacement Instruction

1. Install into standard Q-Line VME rack slot, backplane automatic power & bus connection after slot insertion;

2. Direct drop-in replacement for G01/G02/G03 faulty cards, no wiring modification needed;

3. After replacement: perform zero-point calibration via front test terminals before on-load operation.

6. Application & Commercial Info

• Typical Application: Power plant unit overhaul spare replacement, old WDPF DCS retrofit, emergency breakdown maintenance of turbine DEH analog measurement loop;

• Original OEM production discontinued globally; available stock: fully tested refurbished modules & inspected used original spare parts;

• Standard repair cycle: 2~4 weeks, rush maintenance repair available; global shipment via DHL/UPS/FedEx.

7. Troubleshooting Brief

1. No channel reading: Check backplane ±12V/+5V power supply, front terminal field wiring;

2. Drifting measured value: Re-cal zero/span via front test port, inspect field signal source;

3. Interference fluctuation: Check cabinet ground connection, verify channel jumper configuration matches field signal type.