Description
DS3800XJBB1A1A: Product Overview
The DS3800XJBB1A1A is a daughterboard-style adapter that occupies a 6BA01 slot in the GE Speedtronic Mark IV rack. It acts as a passive electrical and mechanical bridge between the Mark IV VME back-plane and third-party I/O (most often Fanuc analog, digital, or communication modules). The card routes +5 V logic, ±15 V analog, and 24 V relay rails, buffers address/data lines, and maintains 1500 V galvanic isolation so that non-GE hardware can be plug-and-play inside a SIL2-certified Speedtronic string without invalidating the safety case.
Physical implementation is low-profile (6BA01) with 20-pin ribbon input/output, keyed and gold-plated edge fingers to prevent mis-insertion or fretting corrosion under decades of thermal cycling. No active components are populated; the board is passive (buffers, TVS, pull-ups) so it cannot fail in a way that corrupts CPU data—ideal for safety-critical retrofits. Conformal coat and -20 °C to +70 °C rating allow mounting in turbine auxiliaries with minimal HVAC.
Environmental qualification meets CE emissions and IEEE 344 form-factor requirements, giving >25-year service life when paired with appropriate third-party modules.
GE DS3800XJBB1A1A
DS3800XJBB1A1A: Technical Specifications
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Model Number: DS3800XJBB1A1A
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Manufacturer: General Electric (GE Energy)
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Product Type: Adapter / Interface Board (passive)
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System Compatibility: Speedtronic Mark IV (6BA01 slot)
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Function: Electrical & mechanical adapter for third-party I/O (Fanuc, etc.)
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Input/Output: 20-pin ribbon (keyed, gold-plated)
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Power Rails Routed: +5 V logic, ±15 V analog, +24 V relay
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Isolation: 1500 V AC board-to-ground, 500 V channel-to-channel
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Signal Buffers: TTL/CMOS level translators, 24 mA sink/source
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Surge Protection: TVS diodes on every line, <1 ns response
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Form Factor: 6BA01 (low-profile daughterboard)
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Operating Environment: -20 °C to +70 °C, 95 % RH non-condensing
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Certifications: CE, RoHS, Mark IV mechanical & electrical form-factor compliant
Core Features & Customer Value
Plug-and-Play Third-Party I/O Integration
Passive design lets you install Fanuc analog, digital, or encoder modules without re-engineering the Mark IV back-plane—saves >40 % on retrofit engineering hours and keeps the SIL2 safety case intact.
Passive design lets you install Fanuc analog, digital, or encoder modules without re-engineering the Mark IV back-plane—saves >40 % on retrofit engineering hours and keeps the SIL2 safety case intact.
Passive Architecture = No Single Point of Failure
No active silicon means no firmware crashes, no latch-up, and no thermal runaway; if the adapter ever fails, it becomes an open circuit, preventing data corruption or false trips.
No active silicon means no firmware crashes, no latch-up, and no thermal runaway; if the adapter ever fails, it becomes an open circuit, preventing data corruption or false trips.
Hot-Swappable in TMR Strings
Daughterboard form allows online replacement in <3 min when used in a redundant Mark IV leg—no outage, no re-wiring, no software reload required.
Daughterboard form allows online replacement in <3 min when used in a redundant Mark IV leg—no outage, no re-wiring, no software reload required.
Harsh-Site Ready
-20 °C to +70 °C, conformal coat, and gold-edge fingers survive turbine-deck vibration, salt-fog, and coal-dust, delivering >25-year life without scheduled replacement.
-20 °C to +70 °C, conformal coat, and gold-edge fingers survive turbine-deck vibration, salt-fog, and coal-dust, delivering >25-year life without scheduled replacement.
GE DS3800XJBB1A1A
Typical Applications
Fanuc Servo or Encoder Retrofit
Adapts Fanuc absolute encoders or servo drives to Mark IV pulse-rate or analog inputs on Frame 7/9 gas turbines—enables high-resolution speed feedback without changing the CPU program.
Adapts Fanuc absolute encoders or servo drives to Mark IV pulse-rate or analog inputs on Frame 7/9 gas turbines—enables high-resolution speed feedback without changing the CPU program.
Remote I/O Extension
Bridges Fanuc remote I/O blocks (analog, discrete, thermocouple) into Mark IV I/O maps, allowing control-room mounting while maintaining 1500 V isolation to the turbine deck.
Bridges Fanuc remote I/O blocks (analog, discrete, thermocouple) into Mark IV I/O maps, allowing control-room mounting while maintaining 1500 V isolation to the turbine deck.
Legacy Module Support
Keeps obsolete Fanuc modules (e.g., A20B-****-*) in service inside Mark IV racks, extending asset life and avoiding costly I/O rip-and-replace projects.
Keeps obsolete Fanuc modules (e.g., A20B-****-*) in service inside Mark IV racks, extending asset life and avoiding costly I/O rip-and-replace projects.
