1. Product Basic Info

2. Core Function & Channel Parameter

• Core function: Specialized conditioning board for PT100 3/4-wire RTD thermal resistance sensors, provide constant current excitation for field RTD probes, amplify, filter and linearize weak resistance signals, convert into standard analog signal then transmit to DPU main controller for temperature monitoring of turbine bearing, casing, oil system.

• Channel configuration: 4 independent RTD input channels, consistent channel layout matching QSR servo card; supports 3-wire & 4-wire PT100 wiring to eliminate cable lead resistance error, high-precision linear compensation circuit onboard.

• Bus interface: Standard VME backplane bus, powered and data exchange via chassis backboard; reserved front test terminals for on-site zero drift and gain calibration.

3. Electrical & Environmental Specification

• Power supply: +5VDC, ±12VDC input supplied by crate backplane power module.

• Operating ambient: Continuous working temp 0℃~+55℃; storage temp -40℃~+85℃; relative humidity 5%~95%RH non-condensing, non-corrosive gas environment required.

• Circuit design with EMI filtering and full PCB shielding, anti-interference against cabinet contactor, inverter and power supply noise, complies with CE industrial control standard.

4. System Matching & Application

• Form complete Q-Line turbine measurement & servo control unit with QSR servo card, QRS LVDT excitation board, QRD universal analog input card; pin-to-pin compatible for direct slot replacement without field cabinet wiring modification.

• Main application: Power plant unit overhaul spare replacement, aging WDPF DCS transformation, emergency on-site breakdown replacement of turbine temperature measurement loop.

5. Supply & After-sales Terms