Configured for discrete trip execution and relay contact switching in Speedtronic Mark V control systems, the GE DS200TCRAG1ACC (DS200TCRA Relay Output Board) provides direct physical/electrical execution.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | DS200TCRAG1ACC |
| Brand | GE General Electric |
| Origin | USA |
| Weight | 0.95 kg (2.09 lbs) |
| Dimensions | Standard Mark V Board Profile |
| Operating Temp | 0 to 60 deg C |
| Power Consumption | Passive Board (Relay coil drawing < 15.0 W total) |
| Relay Capacity | 30 plug-in electromechanical relays |
| Ribbon Connectors | 4x 34-pin connectors (IDs: JOR, JOS, JOT, JO) |
| Power/Signal Connectors | 4x 12-pin connectors (IDs: JS3, JS4, JS5, JS6) |
| PCB Coating | Normal Conformal Coating |
Backplane Bus & Firmware Architecture
The DS200TCRAG1ACC routes discrete logic outputs directly from the Mark V central processor rack to drive its 30 plug-in relays. Communication across the multi-pin connectors (JOR, JOS, JOT, and JO) operates on parallel bus traces to maximize backplane bus communication velocity and reduce signal latency during automated trip sequences. Dedicated power inputs via JS3 through JS6 drive coil excitation directly. Board-level firmware flash compatibility is determined by the central Mark V processor, ensuring full backward compatibility across the first two revision levels without onboard EEPROM reprograming requirements.
Frequently Asked Questions
Q: Can single relays on the DS200TCRAG1ACC be replaced individually if a coil fails?
A: Yes. The board is populated with 30 plug-in relays, allowing individual relay sockets to be serviced without replacing the entire printed circuit board assembly.
Q: Can the DS200TCRAG1ACC be hot-swapped while the turbine control system is active?
A: No. Standard Mark V procedures require removing core power and field power to the relay outputs to prevent unintended trip actuation or backplane voltage transients.
Q: What are the function differences between the 34-pin and 12-pin connectors?
A: The 34-pin connectors (JOR, JOS, JOT, JO) handle logic command routing from the controller cores, while the 12-pin connectors (JS3, JS4, JS5, JS6) carry high-current power and distribution paths for relay coil drive.
Field Installation Guidelines
- Disconnect system logic power and field contact power supplies prior to removing or installing ribbon cable connectors.
- Align 34-pin ribbon headers with physical key guides on connectors JOR, JOS, JOT, and JO to prevent pin bending.
- Ensure all 30 relays are seated firmly in their sockets before restoring power to avoid high-resistance contact arcs.
- Ground the rack chassis securely via terminal ground buses to shield output control loops from external electromagnetic interference.
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