GE IS200TDBSH2A Relay Output Terminal Board

Product Description

GE IS200TDBSH2A is a Relay Output Terminal Board for GE Speedtronic Mark VI turbine control system, serving as an isolated interface between the controller and field switching actuators. It integrates 12 Form C (SPDT) mechanical relays. Receiving commands from Mark VI main controller, it outputs dry relay contacts to drive alarm loops, solenoid valves, indicator lamps and auxiliary trip devices. It is fitted with removable terminal blocks and connects to VCCC I/O control board via ribbon cable. It supports simplex, dual-redundant and TMR triple-modular redundant architectures with relay coil circuit diagnostics for loop health monitoring. Rack pluggable design widely deployed for BMS burner management and auxiliary protection loops of gas & steam turbines. This model is end-of-life and supplied as spare parts for legacy combined-cycle power plant turbine cabinets.

Technical Parameters

• Model: IS200TRLYS1B
• Type: Relay Output Terminal Board
• Compatible System: GE Speedtronic Mark VI Turbine Control System
• Relay Channels: 12 Form C (SPDT) relays
• Contact Rating: 2A @250VAC resistive load
• Power Supply: 24VDC, dual M1/M2 power inputs
• Interface: Ribbon cable to VCCC I/O board, detachable terminal block
• System Architecture: Simplex, dual redundant and TMR triple redundant supported
• Diagnosis: Relay coil circuit fault diagnosis
• Mounting: Rack pluggable card
• Operating Temperature: -20℃ ~ +70℃
• Features: Contact galvanic isolation, relay status monitoring, fast switching
• Product Status: OEM EOL, industrial spare part

Product Applications

1. Auxiliary alarm, status indication and solenoid drive loops for gas and steam turbine Mark VI control systems.
2. Non-primary-trip discrete output and unit alarm signaling for BMS burner management systems in power plants.
3. Auxiliary protection logic contact output under TMR triple redundant turbine control architecture.
4. Control of field valve feedback circuits, unit alarm lamps and field auxiliary relays.
5. Maintenance, spare parts replacement and control loop retrofitting of legacy Mark VI turbine control cabinets.

Series Models

• IS200TRLYS1B: 12-channel relay output terminal board with coil diagnostics
• IS200TRLYH1B: 24-channel relay output terminal board
• IS200TRPGH1B: Primary trip terminal board (TRPG for main ETD trip loops)
• IS200TREGH1B: Auxiliary trip terminal board (TREG)