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SPECIFICATIONS:
Part Number: DS3800XPER1A1B
Manufacturer: General Electric
Series: Mark IV
Product Type: PC Data Link Isolation Board
Function: Analog To Digital Converter
Max Data Transfer Rate: Up to 1 Mbps
Input Voltage: 24 V dc
Operating Voltage: +5 VDC
Operating temperature: 0°C to +60°C
Size: 8.24 cm high x 4.16 cm
Repair: 3-7 Day
Availability: In Stock
Weight: 0.23 kg
Country of Origin: United States
FUNCTIONAL DESCRIPTION:
DS3800XPER1A1B is a PC Data Link Isolation Board manufactured and designed by General Electric as part of the Mark IV Series used in GE Speedtronic Gas Turbine Control Systems. Its core function is to electrically isolate and buffer communication lines between various control and I/O subsystems within the turbine control architecture. This isolation prevents ground loops, minimizes signal distortion, and protects sensitive microprocessor circuits from transient voltage spikes or electromagnetic interference (EMI) often present in industrial environments. The board acts as an interface between the control processor and peripheral modules, providing opto-isolation or transformer-based decoupling while ensuring high-speed data transmission integrity. It supports half-duplex and full-duplex communication and is engineered to maintain consistent signal levels and impedance matching, even in systems with long cable runs or multiple nodes.
INSTALLATION:
The board is typically slotted into a dedicated location on the backplane of the control rack and secured using mounting brackets and edge connectors designed for zero insertion force (ZIF) or pin-contact engagement. The board's edge connector aligns with the system's I/O bus, ensuring reliable signal transmission. It is critical to verify that power is disconnected before installation to avoid component damage. After placement, associated jumper settings or onboard DIP switches may need configuration, depending on the communication protocol and signal direction requirements. All input/output connections should be verified against system schematics to confirm signal isolation paths and terminations are accurate.
OPERATION:
The board receives signals from a PC or another Mark IV submodule, buffers them using high-speed line drivers, and passes them through isolation barriers (typically opto-isolators or magnetic transformers). These isolated signals are then transmitted to field devices or returned to the system controller. The isolation mechanism ensures that no direct electrical path exists between the transmitting and receiving sides, mitigating risks from voltage surges or differences in ground potential. The board supports continuous high-speed data transmission and error-free operation in harsh conditions where electrical noise or load variation is present.
COMPATIBILITY:
It interfaces seamlessly with a variety of Mark IV processor cards, communication modules, and I/O terminals. The board is often paired with serial data transmit/receive modules, analog input/output isolators, and other signal conditioning boards. As part of GE’s legacy Mark IV family, it adheres to the physical form factor, pin configurations, and data protocol standards used throughout the system. It can be used as a direct replacement in systems using earlier versions of data link isolators and is also backward-compatible with some DS3800 series communication topologies when appropriate jumper or connector adjustments are made. Proper compatibility verification with the system’s configuration manual is essential before integration.
WOC offers one of the largest inventories of replacement parts for GE Speedtronic gas turbine control systems. We supply new, surplus, and professionally refurbished boards, each backed by a reliable warranty. In addition to part sales, we specialize in the expert repair of faulty boards. Our experienced support team is available 24/7 to meet your OEM and automation needs. For pricing, availability, or repair inquiries, please contact us via phone or email. We’re here to help you keep your systems running smoothly.
What is a PC Data Link Isolation Board?
It is a critical communication interface board used in GE Mark IV Speedtronic turbine control systems. It electrically isolates the processor’s data link from field devices and peripheral systems, ensuring data integrity and protection against electrical faults.
What happens if the isolation board fails?
A failed isolation board can result in erratic communication, data transmission errors, or a complete loss of communication between the CPU and I/O subsystems. This can trigger system faults or turbine trip conditions.
What are the signs of degradation in isolation performance?
Increased noise on the signal lines, intermittent communication faults, and error codes in the system diagnostics can indicate degraded isolation. Over time, components like opto-isolators can lose their effectiveness due to heat or voltage stress.
