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GE IS200TREGH1BDB Emergency Trip Terminal Board

Configured for emergency shutdown signal execution in GE Mark VI/Mark VIe Speedtronic turbine control systems, the GE IS200TREGH1BDB (IS200TREGH1BDB Emergency Trip Terminal Board) provides direct relay-based electrical execution for turbine trip circuits and field shutdown devices.

Hardware Specifications

Parameter	Specification
Model	IS200TREGH1BDB
Brand	GE
Origin	USA
Weight	0.9 kg
Operating Temp	0 deg C to +70 deg C
Product Type	Emergency Trip Terminal Board
System Platform	Mark VI / Mark VIe Speedtronic Turbine Control System
Relay Count	12 high-power Form C dry contact relays
Voting Logic	2oo3 or 3oo3 relay voting configuration
Relay Rating	5 A @ 30 VDC or 120 VAC
Logic Input Voltage	24 VDC +/-10%
Driver Input Voltage	200-250 VAC or 110/220 VDC
Isolation Method	Optical isolation on relay channels
Response Time	Less than 5 ms
Protection Features	MOV surge suppression, reverse polarity protection, short-circuit protection
Connectors	JH1 control signals, J2 relay outputs, barrier screw terminals
Assembly Type	Normal Assembly
Revision Compatibility	Backwards-compatible with first two revisions, three total revisions

GE Mark VIe Trip Circuit Interface and Safety Logic

The IS200TREGH1BDB operates as a hard-wired trip termination interface for emergency shutdown circuits. It transfers trip commands from the control architecture to field devices including trip solenoids, circuit breakers, and shutdown valves through relay outputs.

The board supports industrial control safety architectures using 2-out-of-3 (2oo3) and 3-out-of-3 (3oo3) voting logic. This configuration provides fault evaluation at the relay execution layer. The optical isolation between control logic and relay channels separates field switching circuits from internal control signals.

The board is part of GE turbine control hardware where deterministic relay operation, I/O density scaling, and firmware-compatible integration with Mark VI/Mark VIe control platforms are required.

Frequently Asked Questions

Q: Is the IS200TREGH1BDB a standard programmable I/O module?
A: No. The board is a hard-wired emergency trip termination interface using relay circuits and voting logic for shutdown signal execution.

Q: What type of field outputs are provided by the IS200TREGH1BDB?
A: The board provides Form C dry contact relay outputs for interfacing with external trip devices and shutdown circuits.

Q: Does the board support redundant trip architectures?
A: Yes. The board supports 2oo3 and 3oo3 voting configurations for redundant emergency trip execution.

Field Installation Guidelines

Install the IS200TREGH1BDB in the designated Mark VI/Mark VIe rack or panel assembly according to GE mechanical installation procedures. Verify relay terminal assignments before connecting field shutdown wiring.

Separate relay output wiring from low-level communication and signal wiring to reduce electrical interference. Maintain proper grounding of the control enclosure and verify shield termination practices according to site standards.

Before replacement or maintenance, remove field power sources and apply lockout/tagout procedures. Confirm relay contact states and trip circuit operation through approved commissioning tests before returning the system to service.

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