Description
The GE DS200RTBAG3AEB is a specialized Relay Termination Board (RTBA) designed for the Speedtronic™ Mark V Turbine Control System. It serves as the physical interface between the digital control cores and the high-power field devices, such as solenoid valves, motor starters, and auxiliary relays.
Product Introduction
The DS200RTBAG3AEB functions as an output termination point. It receives low-level command signals from the control processors via ribbon cables and uses onboard relays to switch higher-voltage/current field circuits. This separation provides essential galvanic isolation, protecting the sensitive microprocessor-based control cards from electrical noise, surges, and back-EMF generated by inductive field loads.
As a Mark V component, this board is built for the high-reliability demands of power generation environments. The “G3” designation indicates a specific functional grouping or power rating, while the “AEB” suffix denotes the specific hardware revision, incorporating improved circuit traces and component longevity compared to earlier “A” or “B” revisions.
GE DS200RTBAG3AEB
Product Parameters (Datasheet)
The following specifications detail the hardware capabilities of the DS200RTBAG3AEB:
| Parameter | Specification |
| Model Number | DS200RTBAG3AEB |
| Series | Speedtronic Mark V |
| Board Type | Relay Termination Board (RTBA) |
| Relay Channels | Typically 8 or 12 independent channels (Configuration dependent) |
| Contact Rating | 125V DC @ 2A / 240V AC @ 5A (Inductive/Resistive) |
| Control Logic Voltage | 5V DC or 24V DC (via ribbon cable) |
| Connector Type | Screw-type barrier terminal blocks for field wiring |
| Interface Connectors | Multi-pin J-connectors for ribbon cable connection |
| Protection | Onboard Metal Oxide Varistors (MOVs) for surge suppression |
| Indicators | Status LEDs for relay actuation (Optional per revision) |
| Operating Temp | 0°C to +60°C |
| Mounting | Standoff mounting in Mark V “R”, “S”, or “T” cores |
Country of Origin
- Origin: United States (USA)
The GE Mark V Speedtronic series was primarily engineered and manufactured at GE’s industrial control facilities in Salem, Virginia, USA.
Technical Description & Key Features
The DS200RTBAG3AEB board is characterized by its heavy-duty construction and safety-first design:
- Isolation Barrier: The board creates a physical and electrical barrier between the turbine’s “Wet” field power (125V DC/115V AC) and the “Dry” control logic (5V DC). This prevents a field-side ground fault from crashing the control system.
- Surge Suppression: Each relay circuit is equipped with MOVs to clamp voltage spikes that occur when an inductive load (like a solenoid coil) is de-energized.
- TMR Redundancy Support: In Triple Modular Redundant (TMR) systems, these boards facilitate the voting logic. While the processors decide to act, the RTBA board executes the final physical switching of the output.
- Replaceable Relays: In most RTBA configurations, the relays are ruggedized industrial components designed for millions of cycles, though the board itself is typically replaced as a single unit in critical utility environments.
Product Usage Instructions
1. Hardware Installation
- Safety Warning: Ensure the Mark V core power is off before handling. Discharge all static electricity using an ESD wrist strap.
- Align the board with the plastic standoffs in the cabinet.
- Press firmly until the board snaps into place. Secure any grounding wires to the chassis ground bar.
2. Wiring and Interfacing
- Connect the field wires to the screw terminals. Use lug connectors for a secure, vibration-resistant connection.
- Connect the ribbon cables (e.g., JD, JE connectors) from the processing cards to the board. Ensure the “Pin 1” red stripe on the cable matches the “1” marking on the board connector.
3. Maintenance
- Periodically inspect the relays for signs of overheating or “pitting” on the contact points if visible.
- Verify that all terminal screws are tightened to the correct torque, as thermal cycling can cause wires to loosen over time.
Recommended Related GE Models
- GE DS200TCQAG1A: The Analog IO Configuration Board that drives logic to the RTBA.
- GE DS200DTBAG1A: The Digital Termination Board used for contact inputs.
- GE DS200TCEAG1B: The Emergency Protection Board for overspeed trips.
- GE DS200PTBAG1A: The Power Termination Board for distributing core power.
- GE IS200STCIH1A: The modern Mark VIe equivalent termination module for system migrations.
