Description
Key Technical Specifications
| Parameter | Value |
|---|---|
| Product Model | DS200TCRAG1ACC |
| Manufacturer | General Electric (GE) |
| Series | Mark V Speedtronic |
| Functional Acronym | TCRA |
| Product Type | Relay Output Board |
| Main Function | Discrete relay output switching |
| Relay Quantity | 30 plug-in relays |
| Relay Contact Rating | 0.5 A per relay (typical) |
| 34-Pin Connectors | 4 (JOR, JOS, JOT, JO) |
| 12-Pin Connectors | 4 (JS3, JS4, JS5, JS6) |
| PCB Coating | Normal coating |
| Revision Level | G1ACC configuration |
| System Application | Turbine control output interface |
| Compatible Platform | GE Mark V Speedtronic systems |
Application Scenarios & Pain Points
A relay output failure can stop a turbine sequence even when the controller itself appears healthy. A single stuck relay may prevent a valve command, create a false alarm condition, or interrupt auxiliary equipment operation.
Typical applications:
- Gas Turbine Control: Used for switching discrete outputs related to valves, alarms, solenoids, and auxiliary control circuits in GE Mark V systems.
- Steam Turbine Automation: Supports relay-based output commands where field devices require electrical isolation from the controller logic.
- Power Generation Maintenance: Kept as a spare module for operating Mark V cabinets where complete controls replacement is not practical.
- Industrial Drive Applications: Provides relay interface functions for equipment using GE Speedtronic control platforms.
Field note: A power station reported intermittent auxiliary valve command failures. Controller diagnostics showed normal operation, but output verification revealed unstable relay switching. Replacement of the TCRA board and inspection of the connected field wiring corrected the issue.
DS200TCRAG1ACC
Related Products
- GE DS200TCRAG1AAA — Earlier TCRA relay output board version. Similar relay output function, but revision differences require confirmation before substitution.
- GE DS200TCRAG1ABC — Another Mark V relay output board variant. Used in similar output control applications with different hardware revision details.
- GE DS200TCDAH1B — Contact output/interface related board used within Mark V I/O architectures. Suitable for different discrete signal applications.
- GE DS200TCTGG1AEC — Mark V simplex/trip board used for turbine protection-related functions rather than general relay output control.
- GE DS200TBRG1ACC — Relay terminal board used with Mark V relay output configurations for field wiring termination.
- GE DS200DTBCG1AAA — Digital terminal board used for discrete field signal connections.
- GE DS200TCPDG1BEC — Power distribution board for Mark V control cabinets. Supports system power routing rather than signal switching.
- GE IS200VPROH1B — Mark VI protection module used in newer turbine control architectures.
The Engineer’s Guide: Field Pitfalls to Avoid
⚠️ Relay Channel Mapping Errors
The 30 relays are assigned to specific control functions. Moving wiring without documentation can create unexpected equipment actions.
How to avoid: Record every connector position and relay channel assignment before removing the board.
⚠️ Revision Mismatch Within the TCRA Family
Mark V boards often share the same basic function while using different hardware revisions.
How to avoid: Match the complete part number, including DS200TCRAG1ACC, not only the TCRA designation.
⚠️ Damaging Plug-In Relays During Handling
The relay bodies and sockets can loosen after years of vibration exposure.
How to avoid: Inspect relay seating, connector pins, and board mounting points before energizing the cabinet.
Frequently Asked Questions (FAQ)
What is the GE DS200TCRAG1ACC used for?
The DS200TCRAG1ACC is a relay output board used in GE Mark V Speedtronic turbine control systems. It receives control signals from the system and switches relay outputs to external devices.
Is the DS200TCRAG1ACC a processor board?
No. It does not execute turbine control algorithms. Its function is output switching and electrical interface between the Mark V controller and field equipment.
How many relays are installed on the DS200TCRAG1ACC?
The board contains 30 plug-in relays used for discrete output control functions.
Can replace another Mark V relay output board?
Only after confirming:
- Complete part number
- Revision level
- Relay assignment
- Connector wiring
- Cabinet configuration
Similar TCRA boards may not have identical hardware assignments.
What are common failure symptoms of this relay board?
Typical symptoms include:
- Output command present but field device inactive
- Intermittent relay operation
- Turbine alarm output failure
- Auxiliary equipment control problems
Does the require software configuration?
The board itself does not contain application software. Proper operation depends on correct hardware installation, wiring, and Mark V control configuration.
Is a refurbished suitable for turbine service?
A tested refurbished unit can be suitable when relay operation, connector integrity, insulation condition, and compatibility with the installed Mark V cabinet are verified before returning the turbine system to operation.
