Mark IV Memory Module: DS3810MMBE Carrying the DS3800HUMB

This DS3810MMBE1A1A is a Mark IV memory module from GE's DS3810 assembly family, built with a DS3800HUMB Universal Memory Board (UMB) mounted on it. The UMB is the card that actually stores the panel's application program and control constants on its EPROM/EEPROM modules — data the <R>, <S>, and <T> processors of the Mark IV's Triple Modular Redundant (TMR) control scheme depend on every time the panel starts up. Since this assembly's job is defined by the UMB it carries, everything below about diagnosing and reading the DS3800HUMB applies directly to this unit; confirm with your documentation that the DS3810MMBE carrier is the correct mounting for your rack before ordering.

The mounted DS3800HUMB uses a modular connector on one edge and retention levers on the other for quick field service, a single red status LED, and a toggle switch for placing the memory modules into an erase/reprogram state. Its jumpers, single-pin connectors, and module sockets are organized into four quads (A, B, C, D), with pin numbering that resets in each quad — a pin reference is ambiguous unless the quad letter is specified alongside it.

What Fails vs. What Looks Like It Failed

Memory or configuration alarms get pinned on this board often, and not always correctly. Work through these before replacing the module:

• Confirm the connector and retention levers are fully seated — a board that shifted during other rack maintenance can fault identically to a dead one.
• Check the EPROM/EEPROM modules themselves. Since they hold the actual program, a module contact problem can look exactly like a board failure, and existing modules are normally carried over to a replacement rather than sourced new.
• Rule out rack power quality — sagging or noisy supply voltage can cause intermittent checksum faults that clear on a clean power cycle.
• Verify the fault genuinely traces to this board and quad rather than a companion card; the single LED is a general indicator, not a detailed self-test.

Reading DS3810MMBE1A1A and the Mounted DS3800HUMB

"DS3810MMBE1A1A" is the carrier assembly's part number and revision; "DS3800HUMB" identifies the memory board function mounted on it. The trailing digit/letter groups on GE Speedtronic part numbers denote hardware/firmware revisions that are not automatically interchangeable, so match both the assembly and board part numbers against your existing nameplates. Our GE Speedtronic Part Number Decoder covers how these codes are generally structured — contact us if you want us to confirm your exact combination first.

Fits Alongside These Other Mark IV Boards

A Mark IV panel using this memory module will also carry boards such as the DS3800HFPG Drive Control Board, DS3800HMPK Microprocessor/Regulator Control Board, and DS3800NDAC Analog Output Board — all available in our GE Mark IV DS3800 Boards collection. For the wider GE Speedtronic lineup across control generations, see our GE Speedtronic Turbine Control Boards collection.

What We Need From You for a Fast Quote

• Full part numbers, assembly and board (DS3810MMBE1A1A / DS3800HUMB)
• A photo of your existing nameplate(s)
• Turbine model/frame and Mark generation
• Quantity required
• How soon you need it

Request a Quote Today

This DS3810MMBE1A1A with mounted DS3800HUMB is used, cleaned and tested, with a 1-year warranty. We ship worldwide DDP (Delivered Duty Paid), accept purchase orders, and respond within 24 hours. Submit a Request a Quote and we'll verify fit against your system first.

General Information about the Product
Part Number	DS3810MMBE1A1A Mark IV DS3800
Description	DS3810MMBE1A1A by GE DS3810MMBE with DS3800HUMB Universal Memory Board
Condition	used Cleaned and Tested. With 1 Year Warranty.