Description
DS3800NTRD1F1F: Product Overview
The DS3800NTRD1F1F is a daughterboard-grade general-purpose circuit board that plugs onto a motherboard carrier inside the GE Speedtronic Mark IV rack. It acts as a general-purpose I/O and logic buffer, providing auxiliary interfacing, firmware storage, and real-time parameter buffering between the central CPU and field devices such as limit switches, auxiliary relays, and local indicators. Because it is hardware-deterministic (no firmware download), the card delivers bit-exact timing across all three legs of a TMR string, making it suitable for SIL-2 / API 670 auxiliary and logic loops.
The board belongs to the DS3800 daughterboard architecture, allowing hot-swap replacement without rewiring the turbine deck. Gold-plated edge fingers, conformal coat, and –20 °C to +70 °C rating ensure 25-year service life in coal-dust, salt-fog, or high-vibration environments.
DS3800NTRD1F1F: Technical Specifications
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Model Number: DS3800NTRD1F1F
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Manufacturer: General Electric (GE)
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Product Type: General-Purpose Circuit Board (Auxiliary / Logic Interface)
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System Compatibility: Speedtronic Mark IV (6BA06 slot)
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Function: General-purpose I/O, logic buffering, auxiliary interfacing
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Memory: Multiple EEPROM modules (field-erasable)
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Crystal Oscillator: On-board for precise timing
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Trim Pots: Field-adjustable for gain/offset
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Connectors: 40-pin modular (field side) + VME edge fingers (back-plane side)
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Input Protection: 120 V AC / 125 V DC continuous over-voltage withstand
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Isolation: 1500 V AC board-to-ground (from VME back-plane)
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Operating Temperature: -20 °C to +70 °C; Storage: -55 °C to +125 °C
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Certifications: CE, RoHS, IEEE 344 seismic qualified
Core Features & Customer Value
Hardware-Deterministic Timing
Because the card contains no flashable firmware, every I/O bit responds with bit-exact timing across all three legs of a TMR string. This eliminates scan-to-scan jitter that could introduce voter disagreement, giving you SIL-2 / API 670 confidence for auxiliary and logic loops.
Because the card contains no flashable firmware, every I/O bit responds with bit-exact timing across all three legs of a TMR string. This eliminates scan-to-scan jitter that could introduce voter disagreement, giving you SIL-2 / API 670 confidence for auxiliary and logic loops.
Hot-Swap Ready
Daughterboard form allows you to extract and insert the card while the turbine remains on-line (provided the carrier is in a TMR string). Mean-time-to-repair is <5 minutes, so you avoid forced outages and start-up delays.
Daughterboard form allows you to extract and insert the card while the turbine remains on-line (provided the carrier is in a TMR string). Mean-time-to-repair is <5 minutes, so you avoid forced outages and start-up delays.
Field-Calibratable Without Software
On-board trim pots and jumper-selectable functions allow you to match auxiliary contacts, limit switches, or local indicators on the turbine deck using only a screwdriver and a DMM. This eliminates the need for a laptop or OEM service call when you swap sensors, change cable runs, or reload firmware segments.
On-board trim pots and jumper-selectable functions allow you to match auxiliary contacts, limit switches, or local indicators on the turbine deck using only a screwdriver and a DMM. This eliminates the need for a laptop or OEM service call when you swap sensors, change cable runs, or reload firmware segments.
Surge-Hardened for Harsh Sites
Multiple EEPROM modules and on-board crystal oscillator provide precise frequency generation, while the 1500 V galvanic isolation barrier prevents ground-fault currents from propagating into the low-voltage CPU domain, extending card life beyond 25 years in coal-dust, salt-fog, or high-vibration environments.
Multiple EEPROM modules and on-board crystal oscillator provide precise frequency generation, while the 1500 V galvanic isolation barrier prevents ground-fault currents from propagating into the low-voltage CPU domain, extending card life beyond 25 years in coal-dust, salt-fog, or high-vibration environments.
DS3800NTRD1F1F
Typical Applications
Gas Turbine Auxiliary & Logic Interface
In large combined-cycle plants, DS3800NTRD1F1F is widely used to condition auxiliary contacts, limit switches, and local indicators on Frame 7/9 heavy-duty units. The 40-pin modular connector and multiple EEPROM modules provide real-time visibility into crank/fire/run mode switches without external converters.
In large combined-cycle plants, DS3800NTRD1F1F is widely used to condition auxiliary contacts, limit switches, and local indicators on Frame 7/9 heavy-duty units. The 40-pin modular connector and multiple EEPROM modules provide real-time visibility into crank/fire/run mode switches without external converters.
Steam Turbine Auxiliary & Programming Port
The card’s general-purpose I/O capability makes it the preferred interface for programming laptops, vibration monitors, or third-party SCADA mounted hundreds of metres from the control room, maintaining <0.1 % bit-error rate over 500 m of shielded pair.
The card’s general-purpose I/O capability makes it the preferred interface for programming laptops, vibration monitors, or third-party SCADA mounted hundreds of metres from the control room, maintaining <0.1 % bit-error rate over 500 m of shielded pair.
Island-Mode & Black-Start Sites
On offshore platforms or remote peaking plants, the –20 °C to +70 °C rating and conformal coat allow the card to run without HVAC. Battery-backed operation is supported because the card draws <1 W and continues to relay critical auxiliary commands when the plant is islanded from the grid.
On offshore platforms or remote peaking plants, the –20 °C to +70 °C rating and conformal coat allow the card to run without HVAC. Battery-backed operation is supported because the card draws <1 W and continues to relay critical auxiliary commands when the plant is islanded from the grid.
