Built for the serial links that hold a GE Speedtronic Mark IV system together, the DS3800HDRA1B1B is a line driver/receiver board offered here in used condition, cleaned and tested, with a one-year warranty. Its job is simple to state and easy to underestimate: keep data moving reliably between Mark IV panels.

DS3800HDRA1B1B: driving and receiving Mark IV data signals

Long cable runs and electrically noisy surroundings are hard on low-level digital signals. The HDRA answers that by driving outbound data with buffered, amplified line signals and by receiving inbound data through circuitry designed to reject common-mode noise — so a message that leaves one Mark IV cabinet arrives intact at the next. Two 40-pin connectors on the front edge carry that traffic, two jumpers set the board's configuration, and retention levers hold it in the rack. Because it is the physical gateway for the link, a failing HDRA can look like a fault in the processors it serves rather than in the wiring between them. Handle the board as static-sensitive.

Check the jumpers and connectors first

The temptation with a dead link is to replace the driver/receiver immediately. Resist it until you have confirmed the easy things, because most board failures on a communication card turn out to be external:

• Unseat and reseat both 40-pin connectors; a single lifted pin will drop or corrupt the link.
• Photograph the two jumper positions before removing the old board and set the replacement identically.
• Prove the far-end device and the cable between them are good — the link is only as healthy as both ends.
• Measure the rack supply; sagging voltage undermines the board's ability to drive the line.
• Confirm the levers latch fully so the board cannot vibrate loose over time.

Only when those pass and the fault follows this slot should the HDRA be replaced.

Matching revisions on a line driver/receiver board

In the number DS3800HDRA1B1B, DS3800 is the Mark IV board line, HDRA is the line-driver/receiver function code, and the closing 1B1B is the group/revision. The revision suffix is what you verify against the card you are pulling; two boards that share DS3800HDRA can still differ in that trailing code. If you are unsure whether your panel will accept a different revision, ask us before you order. For the full breakdown of GE's numbering, see the GE Speedtronic Part Number Decoder.

Where the HDRA fits among Mark IV boards

Within the Mark IV communication subsystem the HDRA handles the line-level driving and receiving, while the DS3800HMAC media access board and its DS3820MAUD carrier manage access to the shared system bus. Seeing them as a set helps when you are diagnosing a stubborn link problem, since the fault may live in the access hardware rather than the driver/receiver. Browse the wider family through the GE Mark IV DS3800 Boards collection, or the complete GE Speedtronic Turbine Control Boards catalog.

Details we need to quote you

For a 24-hour turnaround, include:

• The full part number with suffix (DS3800HDRA1B1B).
• A photo of the board label and any GE revision or drawing codes.
• The turbine and Mark IV panel the board belongs to.
• Quantity, and whether the machine is currently offline.

Request a Quote to begin. Shipments go worldwide DDP with duties and customs handled, purchase orders are welcome from qualified accounts, and we can pair this board with its communication companions on one quote.

General Information about the Product
Part Number	DS3800HDRA1B1B Mark IV DS3800
Description	GE General Electric DS3800HDRA1B1B DS3800HDRA Line Driver And Receiver Board
Condition	used Cleaned and Tested. With 1 Year Warranty.