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Phone: +86 16626708626Description
Key Technical Specifications
- Manufacturer: General Electric
- Series: Mark V DS200
- Function: Digital I/O board (discrete output pack)
- Application: Turbine control system discrete inputs and outputs (trips, alarms, status)
- Input voltage: 115 VAC or 230 VAC
- Input frequency range: Up to 2.5 MHz
- Output current: 3 A per channel
- Output voltage: Up to 230 VAC
- Connectors: 2 × 50‑pin DS200 backplane connectors plus 2 × 3‑pin field‑wiring connectors
- Indicators: 1 block of 10 LEDs plus 1 side LED for status monitoring
- Jumpers: 8 user‑configurable jumpers (JP1–JP8) for board options
- Mechanical: 330 mm L × 100 mm W × 200 mm H, approx. 2 kg
- Environment: Industrial control cabinet, non‑condensing, no direct high‑heat or EMI sources
Product Introduction
GE DS200TCDAH1BHD is a digital I/O board used in GE Mark V DS200 turbine‑control systems to handle discrete inputs and outputs for trips, alarms, and status signals. It plugs into the DS200 backplane and interfaces between the control processor and field devices such as breaker positions, valve feedback, and trip relays.
Buyers typically replace this board when the original DS200TCDAH1BHD shows intermittent I/O faults or no LED status. The main advantage is exact pin‑compatible replacement with the same input voltage, output current, and jumper configuration; the downside is that it is a legacy Mark V board and must be matched exactly to the original slot and wiring diagram.
Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to this Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| No LED status on any channel | Power loss to board, bad backplane, or dead board | ✅ High | Measure 115/230 VAC at the board input and check backplane LEDs | If backplane is live, swap in a known‑good DS200TCDAH1BHD before chasing wiring |
| One or two outputs not responding | Failed output stage or wiring fault | ✅ High | Cross‑check with a multimeter on the 3‑pin field connector; verify 230 VAC at the terminal | Replace the board if wiring is sound; this board is not field‑repairable at the discrete stage |
| Input does not register in Mark V logic | Bad wiring or wrong input voltage | ✅ High | Measure input voltage at the field terminal and verify 115/230 VAC at the board | Match voltage and check for open circuits or shorted inputs |
| Intermittent I/O faults | Loose backplane or bad connector | ✅ Medium | Inspect DS200 backplane for bent pins and reseat the board | Clean and reseat; if faults persist, assume the board has failed |
| Output trips external contactor but then fails | Overload or marginal contact rating | ✅ Medium | Confirm the load is ≤ 3 A and well within rating | Use an intermediate relay if the field load exceeds 2–2.5 A |
| LEDs flicker or change randomly | Bad jumper setting or control‑logic fault | ✅ Medium | Check all 8 jumpers against the original board; verify DIP‑switch settings in the control program | Restore jumper settings and confirm logic does not toggle the channel in software |
If the fault pattern is unclear, contact technical support with photos of the board, backplane connector, and Mark V I/O diagnostics for the affected channel.
- DS200TCDAH1BHD
- DS200TCDAH1BHD
Frequently Asked Questions
Is this DS200TCDAH1BHD interchangeable with DS200TCDAH1B or other TCDA variants?
Not without verification. The DS200TCDAH1BHD has specific input/output and jumper arrangements. Blind swaps between TCDA variants can cause wrong voltages on the bus or misconfigured I/O; always match the exact model and trace code.
Can I hot‑swap this board in a live Mark V rack?
No. Pull the board with power removed from the DS200 frame. The 115/230 VAC I/O and 50‑pin backplane can arc and damage other boards, and the board is static‑sensitive; always power down and use ESD protection.
Does this board store configuration or firmware?
No. The DS200TCDAH1BHD is a passive I/O card; configuration and logic live in the Mark V processor and I/O controller software. As long as wiring and jumper settings match the original, the behavior should be identical.
Why is this board so expensive compared with generic I/O?
Because it is a legacy Mark V DS200 component, with limited new‑stock availability and niche demand. The price reflects the cost of acquiring and verifying functional units from decommissioned plants, not just the PCB materials.
What condition is this unit in?
Listed as New Surplus / Tested. That means it likely comes from surplus or stored stock, not current‑production GE, and may not be factory‑sealed. The board has been power‑tested and verified for basic I/O function before shipment.
What should I check before installing?
- Match the exact model DS200TCDAH1BHD and jumpers.
- Measure 115/230 VAC at the input terminals before plugging in.
- Verify that all backplane pins are straight and free of debris.
- Use an ESD‑safe work area and wrist strap.
Can this board be repaired if it fails?
Some third‑party vendors attempt repairs, but internal discrete I/O drivers and isolators are not user‑serviceable. For critical‑path Mark V cabinets, most engineers treat DS200TCDAH1BHD as a non‑repairable spare and keep a matched unit on site.
