GE DS200SIOBH1ACA SIOB Servo I/O Board

Technical Specifications

Model: DS200SIOBH1ACA

Brand: GE (GE Vernova)

Product Type: SIOB Servo I/O Interface Board

Applicable System: Speedtronic Mark V gas & steam turbine control system

Core Function: Servo valve current drive output, LVDT/RVDT position signal demodulation acquisition, servo closed‑loop control processing

Hardware Interface: Dual 40‑pin external connectors, VME edge backplane connector, 20 configurable jumpers, three DIP switch blocks

Circuit Feature: Servo current amplification, position signal demodulation, surge suppression and multi‑stage noise filtering

Indicator: Multi‑channel onboard LED for channel running state and fault alarm indication

Power Supply: VME rack backplane multi‑group auxiliary power supply

Operating Temperature:‑30℃ ~ +65℃, non‑condensing

Humidity:5%‑95% non‑condensing

Protection Class:IP20, cabinet rack‑mount installation only

Weight:0.52kg

Dimension:240mm ×190mm ×32mm

Application: Power plant gas‑steam turbine control cabinet, fuel and steam valve control unit

Product Function Description

DS200SIOBH1ACA SIOB servo I/O board is the core servo control hardware of Mark V turbine system. It receives position command signals from main processor, outputs amplified drive current to control servo valves, and completes position adjustment of fuel valves, steam valves and related actuators.

This board collects LVDT/RVDT position feedback signals from valve actuators, completes signal demodulation and conditioning, and feeds real‑time valve position data back to the controller to realize high‑precision closed‑loop position adjustment. On‑board jumpers and DIP switches support field parameter configuration for different servo actuators. ACA hardware revision optimizes signal demodulation circuit layout, improves sampling accuracy and anti‑interference performance, and guarantees stable response of turbine fuel regulation, load adjustment and valve position protection logic.

Product Details

Rack‑mount multilayer PCB plugs directly into Mark V VME cabinet slot. Conformal coating protects circuit board from dust, moisture and strong electromagnetic interference in power‑plant environment, meeting long‑term continuous operation requirements. Original OEM product is end‑of‑life, widely used for unit overhaul and spare‑part replacement. Strict electrostatic protection shall be adopted during installation, verify jumper and DIP‑switch setting to match parameters of on‑site servo actuators.