Description

IS200STCIH2A GE Simplex 24-Channel Digital Contact Input Terminal Board

Technical Specifications

• Product Model: IS200STCIH2A
• Brand: GE General Electric (Speedtronic Series)
• Warranty: One Year
• Input Voltage: 24 VDC / 48 VDC / 125 VDC multi-level field contact excitation
• Operating Temperature: -40°C to +70°C
• Storage Temperature: -40°C to +85°C
• Response Time: ≤ 10 ms discrete signal scanning and upload latency
• Protection Class: IP20 rack chassis mounted, PCB conformal coated
• Accuracy Class: N/A (digital binary input module)
• Output Frequency: 50/60 Hz grid system clock synchronization
• Rated Current Range: 2.5mA per channel (Ch1–Ch21), 10mA per channel (Ch22–Ch24)
• Communication Interface: Internal Mark VI/Mark VIe backplane VME bus
• Supported Protocols: GE proprietary Speedtronic turbine control backplane protocol
• Overload Capacity: Per-channel surge suppression, reverse polarity and short-circuit electronic protection
• Dimensions: 250 mm × 140 mm × 35 mm
• 

Product Overview

The IS200STCIH2A is a simplex digital contact input terminal board exclusively developed for GE Speedtronic Mark VI and Mark VIe gas & steam turbine safety control systems. It acts as the physical signal interface between field mechanical switches and the central turbine controller, collecting open/closed binary status from limit switches, pressure interlock relays, vibration protective devices, breaker auxiliary contacts and emergency stop buttons. This hardware resolves core pain points of loose field wiring, electromagnetic noise causing false trigger signals, limited channel expansion capacity and difficult fault isolation on turbine safety loops. Independent channel filtering and surge clamping eliminate interference generated by high-power ignition systems and variable frequency drives in turbine enclosures, ensuring 100% reliable identification of critical trip commands to avoid unplanned unit shutdowns. Power plant turbine control engineers, thermal generation maintenance supervisors, GE system commissioning technicians and combined-cycle power station automation teams gain robust signal acquisition and simplified cabinet wiring management from this dedicated terminal assembly. The board continuously executes channel integrity self-diagnostics during runtime, locks fault status for post-event review, adopts standard rack plug-in architecture for module replacement, and adheres to power generation industry EMC and functional safety requirements for long-term stable operation in harsh turbine building environments.