Open Box: New Surplus Without the Original Packaging

This DS3800HLEA1B1B is new surplus stock supplied open box — meaning it was never installed or run in a panel, but it no longer has its original factory packaging. For a spares program where run-time hours matter more than retail packaging, an open-box unit like this is functionally equivalent to a boxed one; it's simply been removed from its box at some point in the supply chain. It carries a 1-year warranty, as detailed below.

What a Logic Element Board Does in a Mark IV Rack

The DS3800HLEA is a logic element board in the GE Speedtronic Mark IV control system. It receives and processes discrete input signals from sensors and other control devices in the turbine system, then performs the logical operations that drive the control system's decision-making. Physically, it carries 10 status LEDs visible from the front of the board (which light briefly as a self-test at power-up), 3 configuration jumpers, and a transistor-to-transistor logic (TTL) device that interfaces between the board's integrated circuits. A modular connector and retention levers allow it to be inserted or pulled from the rack cleanly.

Before You Install It: Confirm the Old Board Actually Failed

Because a Mark IV rack has both logic element boards (like this one) and separate logic input boards (DS3800HLIA and HLIC) that condition signals before they reach the element board, a logic-looking fault doesn't always trace back to the HLEA:

• Check field contacts and relay wiring feeding the logic input side — a stuck or corroded contact can look exactly like a card-level logic fault.
• Confirm the 3 jumpers on the board you're replacing are set to match your system's documented configuration — mismatched jumpers after a previous swap are an easy thing to overlook.
• Watch the 10 LEDs during the power-up self-test; a pattern that's common across multiple boards in the rack, rather than isolated to one, usually points to power rather than a single card.
• Identify which of <R>, <S>, or <T> is actually flagging the issue, since Mark IV's two-out-of-three voting means a single-channel logic fault may not trip the unit at all.

Once those are confirmed, installing this board in place of a genuinely failed HLEA is straightforward given the modular connector and retention-lever design.

Matching the 1B1B Suffix

The part number breaks down as DS3800 (board family), HLEA (logic element function), and 1B1B (production run and revision). We don't have a published source explaining what changed between individual revision letters on this board, so we treat the full suffix as something to match exactly against your existing hardware rather than approximate. If you're not certain whether your rack will accept this suffix, send us a photo of the board you're replacing and we'll confirm before you order. Our GE Speedtronic Part Number Decoder explains this numbering convention in more depth.

Companion Boards

Beyond the HLIA/HLIC logic input boards mentioned above, the DS3800HLNE acts as the network/highway controller for logic communication across the rack. Our GE Speedtronic Turbine Control Boards collection is a good starting point if you're sourcing across multiple Mark generations at the same site.

Details That Speed Up Your Quote

• The full part number and suffix from the board you're replacing
• A photo of the label, especially if it's hard to read or has been hand-marked
• Turbine model and confirmation of Mark IV Speedtronic as the control system
• Quantity 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	DS3800HLEA1B1B Mark IV DS3800
Description	GE General Electric DS3800HLEA1B1B DS3800HLEA Logic Element Board OPEN BOX
Condition	newSurplusNoBox Cleaned and Tested. With 1 Year Warranty.