Digital guide
You are here:
GE DS3800HAIA1E1D
Product Name: GE Speedtronic Mark IV High-Frequency Analog-to-Digital Converter Board
Introduction: The DS3800HAIA1E1D is a daughterboard-grade high-frequency analog-to-digital converter that plugs onto a motherboard carrier inside the GE Speedtronic Mark IV rack. It converts ±10 V analog signals from field transmitters and sensors into 0–5 V digital outputs for the Mark IV CPU, used in speed, temperature, and protection loops.
Detailed content
Technical Specifications & Performance Parameters:
- Input Range: -10 V to +10 V (differential)
- Output Range: 0–5 V (single-ended)
- ADC Resolution: 12-bit monotonic, ±½ LSB INL
- Sampling Rate: 100 kHz max (jumper-selectable)
- Isolation: 1500 V AC channel-to-ground, 500 V channel-to-channel
- Filter: 2-pole Butterworth, 10 Hz–10 kHz jumper-selectable
- Connectors: 20-pin ribbon (field side) + VME edge fingers (backplane side)
- Power Rails: +5 V logic, ±15 V analog
- Operating Temperature: -40 °C to +85 °C
- Form Factor: 6BA07
- Qualification: IEEE 344 seismic qualified
Structural & Material Features: Gold-plated edge fingers, conformal coat, TVS transient suppression diodes, RC filter circuits, 2 precision trimpots for gain/offset calibration, 8 hardware jumpers for signal range/filter configuration, EEPROM chip slot for configuration storage.
Application Scenarios: Gas turbine bearing and combustor monitoring (conditioning bearing-metal thermocouples and combustion-can pressure transmitters); steam turbine governor and extraction control (interface for steam-valve position LVDTs and exhaust-pressure transmitters). Suitable for SIL-2 / API 670 safety loops.
Functional Principle: Hardware-deterministic (no firmware) for bit-exact timing across TMR strings. Converts field analog sources to digital outputs consumed by the CPU.
Installation & Usage Notes: Plugs into Mark IV 6BA07 slot. Verify backplane voltages (+5 V, ±15 V) before insertion. The 1500 V galvanic isolation barrier prevents ground-fault propagation. Supports hot-swap replacement without rewiring. Suitable for coal-dust, salt-fog, or high-vibration environments.
