Description
Product Description
The GE DS3800HXPD1B1D is a General Electric Mark IV CPU Expander Board designed for use within the GE Speedtronic Mark IV turbine control system. It is identified as a CPU Expander / Microprocessor Expander Board and provides the required board-level expansion interface within the control architecture.
The board features a modular connector at one end, retention levers for installation, and two 34-pin connectors. It also provides eight EEPROM module sockets and multiple configuration jumpers. The EEPROM sockets allow memory devices to be transferred from an existing board when replacing a defective or unavailable board, subject to the original system configuration.
Because the DS3800HXPD1B1D is a legacy Mark IV control-system component, exact compatibility should be confirmed by matching the complete board number, revision, connector arrangement, installed memory devices, and turbine control-system configuration before installation.
Product Datasheet
| Specification | Details |
|---|---|
| Brand | General Electric (GE) |
| Model | DS3800HXPD1B1D |
| Series | Mark IV / DS3800 |
| Product Name | CPU Expander Board |
| Product Type | Microprocessor / CPU Expansion Board |
| Application | Speedtronic Mark IV Turbine Control |
| Board Family | DS3800HXPD |
| Main Interface | Modular Backplane Connector |
| Auxiliary Connectors | 2 × 34-Pin Connectors |
| Memory Sockets | 8 × EEPROM Sockets |
| Configuration | Multiple Board Jumpers |
| Installation | Plug-In Control Rack Architecture |
| Product Status | Legacy / Obsolete |
| Condition | Used / Surplus — verify actual stock condition |
| Country of Origin | United States / GE manufacturing origin may vary by production batch |
| Dimensions | Approximate; verify against physical unit before enclosure planning |
| Weight | Approximate; depends on installed components |
| Compatibility | GE Speedtronic Mark IV systems |
| Replacement Requirement | Match complete part number and board revision |
Functional Features
- Designed for GE Speedtronic Mark IV turbine control systems.
- Functions as a CPU/microprocessor expansion board.
- Modular plug-in construction for control-system installation.
- Two 34-pin interface connectors.
- Eight EEPROM sockets for system memory modules.
- Multiple jumpers for board configuration.
- Retention hardware supports secure rack installation.
- Suitable for legacy-system maintenance and control-board replacement.
- EEPROM devices may need to be transferred from the original board depending on the system configuration.
- Useful for maintaining existing Mark IV turbine-control installations where original replacement hardware is required.
FAQ
Q1: What is the GE DS3800HXPD1B1D?
It is a GE Mark IV CPU Expander Board, also described as a Microprocessor Expander Board.
Q2: Is DS3800HXPD1B1D the main CPU board?
No. The DS3800HXPD1B1D is identified as a CPU Expander Board. It should not automatically be treated as the primary CPU processor board.
Q3: What system is this board used in?
It is associated with the GE Speedtronic Mark IV turbine control platform.
Q4: Does the board contain EEPROM sockets?
Yes. The board has eight EEPROM sockets. Existing memory devices may need to be transferred from the original board when performing a replacement.
Q5: How many 34-pin connectors are provided?
The board is documented with two 34-pin connectors in addition to its modular board connector.
Q6: Can I install it directly as a replacement?
Only after confirming the complete part number, board revision, memory configuration, jumper settings, connectors, and the target Mark IV system configuration.
Q7: Is DS3800HXPD1B1D still a current GE product?
It is a legacy Mark IV component and is generally treated as an obsolete or discontinued industrial control part.
Q8: What should be checked before purchasing?
Compare the complete DS3800HXPD1B1D marking, board layout, connectors, EEPROM configuration, jumper positions, and existing system documentation.
Troubleshooting & Safety
🛠️ Troubleshooting
- If the board is not recognized, verify the complete part number and revision.
- Check that all required EEPROM devices are correctly installed.
- Compare EEPROM positions and jumper settings with the original board.
- Inspect the modular connector and 34-pin connectors for contamination, bent contacts, or mechanical damage.
- Confirm that the replacement board belongs to the same Mark IV control configuration.
- Do not assume that boards with similar DS3800HXPD numbers are interchangeable.
⚠️ Safety
- Remove control-system power before removing or installing the board.
- Follow the turbine manufacturer’s lockout/tagout procedures.
- Use appropriate ESD protection when handling the board and EEPROM modules.
- Handle EEPROM devices carefully because static discharge can damage stored firmware or configuration data.
- Do not remove or install the board while energized unless the applicable GE system documentation explicitly permits the procedure.
- Verify all wiring, memory devices, jumpers, and connector positions before returning the control system to service.
Recommended GE Mark IV Models
- DS3800HXPA1B1A — Mark IV Memory Expander Board
- DS3800HXPA1D1D — Mark IV Memory Expander Board
- DS3800HXPA1E1D — Memory Expander Circuit Board
- DS3800HXPA1E1E — GE Memory Expander Card
- DS3800HXPA1F1H — Speedtronic Memory Expander Board
- DS3800HXPC — CPU Expander Card
- DS3800HXPC1D1E — Mark IV CPU Expander Board
- DS3800HXPC1D1F — Turbine Control CPU Expander Card
- DS3800HXPD1C1D — Turbine Control CPU Expander Board
- DS3800HXPD1C1E — Mark IV CPU Expander Board
- DS3800HXPD1D1E — Mark IV CPU Turbine Control Expander
- DS3800HXRA1D1D — Mark IV Series Receiver Board
- DS3800HXRA1E1D — GE Series Receiver Board
- DS3800HXRB1B1B — C Bus Receiver Card
- DS3800HXRC1F1C — Mark IV Series Receiver Board
