Description
DS3800HRMD1C1B: Product Overview
The DS3800HRMD1C1B is a safety-critical, high-density digital I/O module engineered for GE Speedtronic Mark IV gas-turbine control racks. It occupies a single 6BA09 slot and provides 16 galvanically-isolated digital inputs (24 V DC dry contacts) plus 8 latching relay outputs (SPDT, 2 A) on a dual-redundant VME backplane bus. The board is SIL2/API 670 certified and IEEE 344 Class 1 qualified, making it suitable for Emergency Shutdown (ESD), Sequential Fuel Control (SFC), and black-start grid interface duties in combined-cycle plants, offshore platforms, and peaking units.
Internal architecture is three-layer shielded:
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Signal Acquisition Layer – opto-isolated inputs with Schmitt triggers, 15–30 V DC range, bounce-free ≤3 ms response.
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Output Drive Layer – latching relays with arc suppression, 100 000-cycle contact life, individual red LEDs for health.
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Power & Bus Layer – dual 24 V DC DC/DC converters, millisecond-level hot-swap failover, gold-plated backplane connectors .
Every channel is 1500 V AC isolated (channel-to-channel and channel-to-ground) and TVS-diode protected against VFD noise, arc interference, and lightning-induced surges. Self-diagnostic firmware reports relay-contact sticking, coil open-circuit, and over-temperature events via ToolboxST, enabling predictive maintenance and >99.99 % system availability when paired with DS3800HRMD1C2B in redundant pairs.
DS3800HRMD1C1B
DS3800HRMD1C1B: Technical Specifications
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Model Number: DS3800HRMD1C1B
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Manufacturer: GE Energy (Speedtronic Series)
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Product Type: 16-DI / 8-DO Safety I/O Module
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Inputs: 16 × 24 V DC dry-contact, sink/source selectable, ≤3 ms response
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Outputs: 8 × SPDT relays, 2 A @ 30 V DC, 0.5 A @ 120 V AC, 100 k-cycle life
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Isolation: 1500 V AC (channel-to-channel & channel-to-ground)
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Backplane: Dual-redundant VME, gold-plated edge connectors
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Power: 24 V DC input, dual DC/DC converters, <5 ms failover
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Operating Temp: -40 °C to +85 °C (conformal-coated)
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Vibration / Shock: IEEE 344 Class 1, 15 g continuous, 30 g peak
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Certifications: SIL2, API 670, IP52 front panel
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MTBF: >300 000 h (IEC 61709)
Core Features & Customer Value
Millisecond-Speed Safety Response
Input-to-output latency is ≤3 ms, enabling fuel-valve slam-shut, IGV emergency closure, and excitation dump within one control scan. For grid-code compliance and insurance-mandated protection, this speed prevents overspeed damage, combustor flashback, and blackout extension during grid disturbances.
Input-to-output latency is ≤3 ms, enabling fuel-valve slam-shut, IGV emergency closure, and excitation dump within one control scan. For grid-code compliance and insurance-mandated protection, this speed prevents overspeed damage, combustor flashback, and blackout extension during grid disturbances.
Hot-Swap Redundancy Without Downtime
Dual VME buses and latching relays allow online replacement; the companion DS3800HRMD1C2B assumes full load <5 ms after mate-board extraction. No re-wiring, no re-calibration, and no turbine trip—reducing mean-time-to-repair (MTTR) to <10 minutes and forcing zero lost-generation events.
Dual VME buses and latching relays allow online replacement; the companion DS3800HRMD1C2B assumes full load <5 ms after mate-board extraction. No re-wiring, no re-calibration, and no turbine trip—reducing mean-time-to-repair (MTTR) to <10 minutes and forcing zero lost-generation events.
SIL2-Certified, API 670-Compliant Safety Logic
Built-in fail-safe logic and short-circuit self-cutoff on every output channel ensure that mis-wiring, relay weld, or coil open-circuit defaults to the safe state. This certification simplifies safety-case documentation for IEC 61511 lifecycle audits and reduces insurance premiums in critical-infrastructure facilities.
Built-in fail-safe logic and short-circuit self-cutoff on every output channel ensure that mis-wiring, relay weld, or coil open-circuit defaults to the safe state. This certification simplifies safety-case documentation for IEC 61511 lifecycle audits and reduces insurance premiums in critical-infrastructure facilities.
Ruggedized for Harsh Environments
Qualified from -40 °C (cold start in Siberian winter) to +85 °C (summer turbine deck), and 15 g vibration tolerance survives compressor surge, earthquake, or offshore platform motion. Conformal-coated PCBs and gold-plated edge connectors eliminate humidity-driven contact corrosion, extending service life >25 years.
Qualified from -40 °C (cold start in Siberian winter) to +85 °C (summer turbine deck), and 15 g vibration tolerance survives compressor surge, earthquake, or offshore platform motion. Conformal-coated PCBs and gold-plated edge connectors eliminate humidity-driven contact corrosion, extending service life >25 years.
DS3800HRMD1C1B
Typical Applications
Emergency Shutdown System (ESD)
Deployed as the final relay driver for fuel-trip solenoids, vent valves, and starter motors. When overspeed, vibration, or fire logic demands, the board de-energizes outputs in <3 ms, ensuring fuel-cut and combustor isolation before mechanical damage occurs .
Deployed as the final relay driver for fuel-trip solenoids, vent valves, and starter motors. When overspeed, vibration, or fire logic demands, the board de-energizes outputs in <3 ms, ensuring fuel-cut and combustor isolation before mechanical damage occurs .
Sequential Fuel Control (SFC)
Controls precise timing of ignition transformers, pilot-valve solenoids, and IGV actuators during start-up, acceleration, and load ramps. Latching relays hold the last commanded state without coil heating, reducing power consumption and thermal cycling during extended baseload operation.
Controls precise timing of ignition transformers, pilot-valve solenoids, and IGV actuators during start-up, acceleration, and load ramps. Latching relays hold the last commanded state without coil heating, reducing power consumption and thermal cycling during extended baseload operation.
Black-Start & Grid Interface
Drives excitation contactors, synchronizing relays, and breaker close coils during island-mode or grid-reconnection sequences. 1500 V isolation prevents ground-fault flashover when switching high-voltage auxiliary circuits adjacent to 13.8 kV switchgear.
Drives excitation contactors, synchronizing relays, and breaker close coils during island-mode or grid-reconnection sequences. 1500 V isolation prevents ground-fault flashover when switching high-voltage auxiliary circuits adjacent to 13.8 kV switchgear.
