GE DS3800HRMD1C1B
Product Overview
The GE DS3800HRMD1C1B is a high-reliability digital input/output (DI/DO) module specifically designed for the GE Mark IV Speedtronic gas turbine control system, and it serves as a core component of the DS3800 series. This module is engineered for critical control functions of gas turbines, such as safety interlocking, Emergency Shutdown (ESD), and Sequential Fuel Control (SFC). It adopts a military-grade redundant architecture and fail-safe logic to ensure millisecond-level response under extreme conditions (e.g., sudden grid frequency changes, high-temperature and high-pressure environments).
The DS3800HRMD1C1B provides 16 channels of digital input (24V DC dry contacts) and 8 channels of relay output (2A @ 30V DC). All channels feature 1500V AC electrical isolation and communicate with Mark IV main controllers (such as the DS2000 series) via a dual-redundant backplane bus. Its vibration-resistant design (compliant with IEEE 344 Class 1) and wide operating temperature range (-40°C ~ +85°C) make it suitable for high-demand scenarios like offshore platforms and combined-cycle power plants.
Product Parameters
- Product Model: DS3800HRMD1C1B
- Manufacturer: GE Energy (Speedtronic series)
- Product Type: Digital input/output module
- Input Channels: 16 channels (24V DC dry contacts, sink/source selectable)
- Output Channels: 8 relays (SPDT, 2A @ 30V DC / 0.5A @ 120V AC)
- Input Response Time: ≤3ms (ON/OFF switching)
- Output Contact Life: 100,000 operations (resistive load)
- Isolation Voltage: 1500V AC (between channels / channel to ground)
- Backplane Communication: Dual-redundant VME bus
- Operating Temperature: -40°C ~ +85°C
- Protection Rating: IP52 (front panel)
- Compatible System: GE Mark IV Speedtronic
- MTBF: 300,000 hours (IEC 61709)
Structure and Composition
The DS3800HRMD1C1B features an all-metal shielded enclosure with a three-layer internal structure:
Signal Acquisition Layer
- Input channels are equipped with photoelectric isolation + Schmitt triggers to eliminate contact bounce and support a wide input voltage range of 15-30V DC.
- Each group of 8 channels shares an independent common terminal (COM), enabling flexible grouped wiring.
Output Drive Layer
- Uses latching relays (no continuous power supply required) with built-in arc suppression circuits and contact wear monitoring.
- Output status is indicated in real-time via red LEDs (independent for each channel).
Communication and Power Layer
- Dual-redundant DC/DC power modules (24V DC input) support millisecond-level fault switching.
- Exchanges data with the Mark IV controller via gold-plated backplane connectors, offering strong corrosion resistance.
Key Features and Advantages
- Gas turbine-specific safety design: Certified to SIL2/API 670, all output channels feature short-circuit self-cutoff functions to prevent turbine surge caused by misoperation.
- Dual-redundant architecture: Supports parallel operation with the DS3800HRMD1C2B module, enabling automatic switching in case of faults, with system availability >99.99%.
- Superior anti-interference: 1500V AC isolation between channels + TVS diode protection to resist on-site electromagnetic noise (e.g., from frequency converters, arc interference).
- Self-diagnostic capability: Real-time monitoring of faults such as relay contact sticking and coil open circuits, triggering preventive maintenance alerts via ToolboxST software.
- Vibration resistance: Passed IEEE 344 Class 1 testing, capable of withstanding 15G continuous impact, suitable for high-vibration gas turbine environments.
Application Fields
- Emergency Shutdown System (ESD): Triggers rapid closure of fuel valves (interlocking with the DS3800HSCA safety module).
- Sequential Fuel Control (SFC): Controls the timing of ignition transformers and inlet guide vane (IGV) actuators.
- Grid black start: Drives excitation system contactors to ensure rapid grid connection of gas turbines.
- Offshore platforms: Forms a triple-redundant safety chain with the Triconex 1131 system.
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