DS3800HAIA1D - Analog Converter Circuit Board

SPECIFICATIONS:

Part Number: DS3800HAIA1D
Manufacturer: General Electric
Series: Mark IV
Board Type: Analog Converter Circuit Board
Converter Resolution: 12-bit
Input Signal Range: ±10 V
Number of Channels: Multiple
Connectors: 34-pin
Calibration Storage: EEPROM
Operating Temperature: 0 °C to +60 °C
Board Size: 16.51 cm high x 17.8 cm
Repair: 3-7 Days
Country of Origin: USA
Availability: In Stock

FUNCTIONAL DESCRIPTION:

DS3800HAIA1D is an Address Customize Board manufactured and designed by General Electric as part of the Mark IV Series used in Speedtronic control systems. It is designed to interface between turbine field sensors and the GE Mark IV Speedtronic control system by accurately digitizing analog signals. It first conditions the incoming sensor inputs using isolation, amplification, scaling, and filtering circuits to ensure noise-free and reliable measurements. A built-in multiplexer then sequentially channels the conditioned signals to a high-resolution 12-bit analog-to-digital converter, which transforms the analog values into precise digital data for the control processor. The board also incorporates calibration features, including trimmer resistors, jumpers, and an onboard EEPROM to store critical scaling constants and configuration parameters, allowing stable operation even after power cycles or hardware replacement. With modular edge connectors and diagnostic test points, the board ensures dependable communication with the control system and supports field maintenance, while its rugged industrial design provides resilience against vibration, temperature fluctuations, and electrical disturbances.

OPERATION:

The Analog Converter Circuit Board operates by acquiring raw analog signals from turbine sensors, conditioning them for accuracy, and then digitizing them for use in the Mark IV control system. The multiplexer ensures multiple sensor inputs can be sequentially processed through a single converter, while the 12-bit ADC provides precise digital output. Calibration constants stored in the EEPROM guarantee that scaling and offset adjustments remain consistent, supporting stable system behavior over time and across board replacements.

• Signal Conditioning – Provides isolation, gain adjustment, and noise filtering for accurate sensor signal processing.
• Multiplexed Input Channels – Sequentially selects multiple analog signals for digitization without additional converters.
• High-Resolution Conversion – Uses a 12-bit ADC to deliver precise and stable digital data to the control system.
• Calibration & Memory – Includes trimmer resistors, jumpers, and EEPROM storage for calibration constants and configuration data.
• Industrial Reliability – Built with diagnostic test points and a rugged design to withstand vibration, electrical noise, and harsh environments.

WOC offers the largest stock of OEM replacement parts for GE Speedtronic Gas Turbine Control Systems, including unused, rebuilt, and fully tested boards backed by a reliable warranty. In addition to supplying high-quality components, we provide expert repair services for faulty boards, restoring them to OEM specifications to ensure optimal turbine performance. Our team of experienced engineers and technicians is available 24/7 to provide technical support, troubleshooting, and guidance for all automation and control system requirements. For pricing, availability, or assistance with parts and repairs, WOC’s experts are ready to help via phone or email.

FREQUENTLY ASKED QUESTIONS:

What happens if the board fails to digitize input signals?

If ADC conversion fails, the control processor may register invalid or frozen values. This usually indicates ADC chip malfunction, multiplexer failure, or power supply instability.

How can calibration errors be detected?

Calibration errors often appear as incorrect scaling or offset in sensor readings. Checking trimmer resistor settings and EEPROM-stored constants helps verify calibration integrity.

What causes noise or unstable digital outputs?

Excessive electrical noise, faulty filtering components, or degraded capacitors can produce unstable conversions. Inspecting input filtering circuits and grounding paths usually resolves the issue.