New Surplus Factory Stock, Not a Used Pull

Most of the DS3800NDAC boards that reach the secondary market today are recovered from decommissioned panels and refurbished. This listing is different: it's new surplus factory-packaged stock — unused DS3800NDAC1E1F inventory that was never installed, rather than a board pulled from service and cleaned up afterward. For sites still running GE Speedtronic Mark IV and looking to build spares stock with the lowest possible run-time risk, that distinction matters. It still carries a 1-year warranty, as noted below.

What the DS3800NDAC Does in the Panel

The DS3800NDAC is the analog output board in a Mark IV Speedtronic control system — GE's first Speedtronic platform to use triple modular redundant (TMR) control, with three processors (documented in the system as <R>, <S>, and <T>) and a <C> communications processor voting two-out-of-three on control decisions. This card takes the digital output values that architecture produces and turns them into the analog voltage or current signals used to drive valves, actuators, and similar final control elements on the turbine and its auxiliaries.

Even With New Stock On Hand, Confirm the Diagnosis First

Buying new surplus doesn't change the troubleshooting logic — it's still worth confirming the fault actually belongs to this board before installing a replacement:

• Wiring and ribbon-cable connectors between the rack and the field device are a common source of apparent output faults on older panels, independent of the card's condition.
• The actuator or its feedback device (an LVDT, for example) can produce symptoms indistinguishable from a bad analog signal.
• Rack power quality — even a brand-new card will show fault-like behavior if it's being fed unstable or noisy power.
• Which of <R>, <S>, or <T> is flagging the issue — a single-channel fault under two-out-of-three voting may never trip the unit, so confirm the channel before swapping hardware.

Once those are ruled out, installing new surplus stock rather than a rebuilt used card is a reasonable way to reduce the odds of an early repeat failure.

The 1E1F Suffix, Briefly

DS3800 names the board family, NDAC names the analog output function, and 1E1F identifies the production run and revision — run "E," revision "F." GE did not publish a public letter-by-letter change log, so treat the full suffix as a required match to what's currently installed in your rack rather than an optional detail, and confirm with us if you're substituting a different suffix than the one you're replacing. Our GE Speedtronic Part Number Decoder explains the broader numbering convention across Mark IV, V, and VI hardware.

Related Boards

The DS3800NADA covers the complementary analog-to-digital role on the input side of the same signal chain, and other DS3800 "N"-prefixed cards handle current-loop and thermocouple inputs in the same panel. Our GE Mark IV DS3800 Boards collection covers the wider family if you need to cross-check part numbers while you're stocking spares.

What to Send for a Quote

• The full part number and suffix from your existing board (or confirmation you're stocking new spares)
• A photo of the label on the board you're replacing, if applicable
• Turbine model and confirmation the system is Mark IV Speedtronic
• Quantity needed and timeline

We quote within 24 hours, ship worldwide DDP, and accept purchase orders. Click Request a Quote to get started.

General Information about the Product
Part Number	DS3800NDAC1E1F Mark IV DS3800
Description	DS3800NDAC1E1F by GE General Electric DS3800NDAC Analog Output Board Mark IV NEW
Condition	newSurplusFactoryPackage Cleaned and Tested. With 1 Year Warranty.