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GE DS200TCRAG1A Relay Output Board

The GE DS200TCRAG1A, also cataloged as the DS200TCRA Relay Output Board, operates as a dedicated hardware component for relay contact switching execution within the Speedtronic Mark V LM control system. It receives control signals from the Mark V rack and provides isolated relay outputs for external field circuits.

Hardware Specifications

Parameter	Specification
Model	DS200TCRAG1A
Brand	General Electric (GE)
Origin	USA
Product Type	Relay Output Board
System Compatibility	GE Speedtronic Mark V LM
Functional Acronym	TCRA
Relay Count	30 electromechanical relays
Relay Contact Configuration	Form C contacts (SPDT / DPDT depending on jumper configuration)
Interface	Multi-pin ribbon cable header connectors
Board Size	55 mm x 65 mm
Weight	0.15 kg
Operating Temp	0 deg C to 50 deg C
Storage Temp	-40 deg C to 85 deg C
Humidity Range	5% to 95% non-condensing

Mark V Relay Output Switching Architecture

The DS200TCRAG1A provides relay-based electrical switching between the Speedtronic Mark V LM control rack and external control circuits. The board contains 30 plug-in electromechanical relays mounted on the PCB assembly. Relay coil drive signals are received through ribbon cable connections, while contact outputs provide field-level switching interfaces.

The relay board incorporates coil suppression components including flyback/freewheeling diodes to reduce transient voltage generated during relay de-energization. The module design supports discrete output execution for equipment interlocks, alarm circuits, solenoid control, and auxiliary switching functions within the turbine control architecture.

Frequently Asked Questions

Q: Does the DS200TCRAG1A support hot-swap replacement in a Mark V rack?
A: The DS200TCRAG1A is a rack-mounted relay interface board. Replacement procedures require following Mark V shutdown and maintenance procedures unless the system documentation specifically defines live replacement capability.

Q: What type of field signals are handled by this relay board?
A: The board handles discrete relay contact switching signals. It does not provide analog signal measurement or process input conversion.

Q: How is the relay output board connected to the control system?
A: The board interfaces with the Mark V control architecture through multi-pin ribbon cable header connections.

Field Installation Guidelines

Install the DS200TCRAG1A in the designated Mark V control rack slot according to system hardware documentation. Verify connector alignment before insertion and avoid applying mechanical force to PCB components.

Use appropriate grounding practices for the control cabinet. Maintain separation between relay output wiring and high-voltage power conductors to reduce electrical interference. Confirm field wiring polarity, terminal identification, and external circuit protection before energizing connected equipment.

Inspect PCB connectors, relay contacts, and cable assemblies during installation or maintenance activities. Confirm that the board coating surface remains free from contamination, moisture, and conductive debris.

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