DS3810MMBA1A1A: Another Mark IV Carrier for the DS3800HUMB1B1B

GE produced the Mark IV Universal Memory Board (UMB) on a few different carrier assemblies, and this DS3810MMBA1A1A is one of them, supplied with a DS3800HUMB1B1B mounted in place. Whichever carrier your rack uses, the working part is the same: the DS3800HUMB stores the panel's application program and control constants on EPROM/EEPROM modules, feeding the <R>, <S>, and <T> processors of the Mark IV's Triple Modular Redundant (TMR) control scheme at every startup. Before ordering, confirm against your documentation (or with us) that the DS3810MMBA carrier is what your specific rack was built around.

The DS3800HUMB card mounted on this assembly uses a modular connector on one edge and retention levers on the other, allowing quick removal and reinsertion without disturbing neighboring boards. A single red LED and a toggle switch (for placing the memory modules into an erase/reprogram state) sit on the front edge, and the board's jumpers, single-pin connectors, and module sockets are grouped into four quads — A, B, C, and D. Pin numbering restarts inside each quad, so a referenced pin only means something once the quad letter is specified.

Don't Replace This Assembly for the Wrong Reason

A memory or configuration alarm doesn't automatically mean this module has failed. Before swapping it, check:

• Whether the connector or retention levers are fully seated — loose seating after other rack work can produce the same symptoms as a real fault.
• Whether an individual EPROM/EEPROM module, not the carrier, is the actual failure point; modules are normally moved onto a replacement's empty sockets rather than sourced new.
• Rack power quality — sagging or noisy supply voltage can cause intermittent checksum faults that clear after a clean power cycle.
• Whether the alarm and quad genuinely trace back to this board, since the single LED only gives a general status indication, not a detailed diagnosis.

Decoding DS3810MMBA1A1A and DS3800HUMB1B1B

"DS3810MMBA1A1A" identifies the carrier assembly and its revision; "DS3800HUMB1B1B" identifies the memory board function and revision mounted on it. GE's trailing suffix groups mark specific hardware/firmware revisions that are not automatically interchangeable, so match both part numbers on your existing nameplates wherever possible. Our GE Speedtronic Part Number Decoder covers how these part numbers are generally built, and we can confirm your exact combination before you order.

What Else Lives in This Mark IV Panel

Alongside this memory module, a typical Mark IV panel includes boards such as the DS3800HFPG Drive Control Board, DS3800HMPK Microprocessor/Regulator Control Board, and DS3800NDAC Analog Output Board — all listed in our GE Mark IV DS3800 Boards collection. If your site is looking further ahead at later Speedtronic generations, our Mark V vs Mark VI: DS200 to IS200 guide explains how Mark V and Mark VI/VIe hardware differs from Mark IV.

Quote Request Details We'll Need

• Full part numbers for the assembly and board (DS3810MMBA1A1A / DS3800HUMB1B1B)
• A photo of your existing nameplate(s)
• Turbine model/frame and confirmation of Mark IV
• Quantity required
• Your urgency/timeline

Get a Quote — 24 Hour Response

This DS3810MMBA1A1A with mounted DS3800HUMB1B1B is used, cleaned and tested, with a 1-year warranty. We ship worldwide DDP (Delivered Duty Paid), accept purchase orders, and respond to every quote request within 24 hours. Submit a Request a Quote and we'll verify it matches your turbine and panel before it ships.

General Information about the Product
Part Number	DS3810MMBA1A1A Mark IV DS3800
Description	General Electric DS3810MMBA1A1A DS3810MMBA w DS3800HUMB1B1B Universal Memory Bd
Condition	used Cleaned and Tested. With 1 Year Warranty.