I/O modules

The GE IS200TREGH2B IS200TREGH2BDC Emergency Trip Board handles critical safety shutdown functions for gas and steam turbines. This board operates within a Triple Modular Redundant (TMR) architecture. It executes a 2oo3 voting scheme for maximum reliability. You will find it protecting turbine overspeed and overtemperature conditions.

Core Technical Specifications

The GE IS200TREGH2B IS200TREGH2BDC contains 32 discrete output channels on one assembly. Each channel drives a high-current relay for solenoid control. The board accepts 24 VDC or 125 VDC control power inputs. Every output channel handles 5 amperes continuously at 125 VDC.

Connectors and Diagnostic Interfaces

The GE IS200TREGH2B IS200TREGH2BDC uses three 37-pin D-sub connectors for field wiring. These connectors separate the R, S, and T TMR channels physically. Four LED indicators show board status clearly. A green LED confirms normal operation. A red LED signals a trip condition immediately. Amber LEDs indicate channel mismatch or self-test failures. Moreover, the board includes a test pushbutton for manual trip verification.

Energy Storage and Safety Features

This emergency trip board intentionally stores no large capacitive energy on outputs. Consequently, residual power will not delay a critical shutdown. The GE IS200TREGH2B IS200TREGH2BDC integrates diagnostic self-testing every millisecond. This testing detects stuck relays or welded contacts instantly. Each output includes a paralleled redundant path for fail-safe operation. Do not use this board for simplex control applications. You must install it within a complete TMR cabinet for SIL3 compliance. This board meets GE Mark VI series specifications precisely

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