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GE DS200RTBAG2AHC Relay Terminal Board

The GE DS200RTBAG2AHC, also cataloged as the DS200RTBA Relay Terminal Board, operates as a dedicated hardware component for relay signal isolation and field device switching within GE Mark V Speedtronic turbine control systems.

Hardware Specifications

Parameter	Specification
Model	DS200RTBAG2AHC
Brand	GE
Origin	United States
Weight	0.3 kg
Dimensions	23 cm x 15 cm x 1.6 mm
Operating Temp	0 to +55 deg C
Power Consumption	Not specified; 24 VDC relay coil operation
Board Type	Relay Terminal Board (RTBA)
System Platform	GE Mark V Speedtronic turbine control system
Relay Quantity	10 electromechanical relays
Relay Configuration	7 DPDT relays with 2 Form-C contacts, 3 4PDT relays
Coil Voltage	24 VDC
Relay Contact Rating	5 A at 250 VAC / 30 VDC
Response Time	Approx. 10 ms typical
Mechanical Life	10 million operations
Electrical Life	100,000 operations at rated load
Protection	130 VAC MOV protection per relay
Indicators	Individual relay diagnostic lamps
Connectors	2 x 20-pin headers and 1 terminal block
PCB Construction	4-layer FR-4 PCB with approx. 95 components and 8 ICs
Mounting	4 x M4 screw holes with standoffs

GE Mark V Relay Interface and Switching Characteristics

The DS200RTBAG2AHC provides relay expansion and switching functions between Mark V controller logic circuits and external field devices. The relay channels isolate low-voltage control signals from actuator, solenoid, interlock, and protection circuits.

The board follows GE industrial control hardware architecture with relay status indication, configurable jumper settings, and field wiring terminals. Each relay channel includes MOV-based surge suppression to reduce transient effects generated by inductive loads.

The relay interface supports deterministic signal execution in Mark V control systems, where relay output states are coordinated through controller I/O processing and turbine protection logic. The board design supports I/O density scaling by adding multiple switched outputs without modifying the primary controller backplane structure.

Frequently Asked Questions

Q: What relay configurations are available on the DS200RTBAG2AHC?
A: The board contains 10 electromechanical relays, including 7 DPDT relays with 2 Form-C contacts and 3 4PDT relays.

Q: What voltage is required for relay coil activation?
A: The relay coils operate at 24 VDC.

Q: How are relay outputs protected from voltage transients?
A: Each relay channel includes MOV protection for surge suppression associated with field switching loads.

Field Installation Guidelines

Install the DS200RTBAG2AHC in the designated GE Mark V cabinet location with control power removed before handling the PCB.

Verify relay terminal assignments, connector seating, jumper configuration, and mounting hardware before energizing the system. Separate relay field wiring from sensitive analog signal cables and high-current conductors to reduce electrical interference.

Connect cable shields according to the cabinet grounding design. Confirm external device voltage levels match the relay contact and coil specifications before commissioning. Inspect relay indicators during functional testing to verify switching status and field circuit response.

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