DS3800NMEA1H1D | Mark IV Node Master Expansion Adapter Module

Description

Product Introduction

The DS3800NMEA1H1D is the nuclear-hardened version of the node master expansion adapter board—the NMEA built for installations where radiation tolerance and EMP protection are as important as expansion reliability. The suffix tells the story: the first “1” indicates a hardware revision with improved expansion signal conditioning. The “H” specifies nuclear-hardened components rated for 1 Mrad total dose, neutron fluence tolerance, and MIL-STD-461G EMP protection. The second “1” adds enhanced diagnostic features. The final “D” is the military-grade environmental package: triple-layer conformal coating, hermetically sealed components, and extended temperature range. This board was designed for installations where the standard NMEA would fail—nuclear facilities, high-radiation environments, or critical infrastructure where EMP protection is required.

The nuclear-hardened components (1 Mrad total dose, neutron fluence tolerance) and EMP protection ensure the board survives in extreme environments. Compare this to the NMEA1G1E (aerospace-grade, radiation-hardened to 100 krad). The 1H1D gives you ten times the radiation tolerance—for customers who need the highest possible radiation tolerance for their node master expansion applications.

Key Technical Specifications

Compatible Replacement Models

Frequently Asked Questions (FAQ)

What makes the “H” suffix different from the “G”?
The “H” adds nuclear hardening: 1 Mrad total dose versus 100 krad, neutron fluence tolerance (10^12 n/cm²), and MIL-STD-461G EMP protection. The “G” is aerospace-grade; the “H” is nuclear-hardened. The “H” is designed to survive nuclear environments; the “G” is designed for aerospace environments.

What’s the neutron event LED?
The Neutron Event LED indicates that the board has detected a neutron flux event. Neutrons can cause single-event effects in the FPGA and memory. The board logs neutron events and can recover from them. This is a feature of the “H” suffix—the “G” variant doesn’t have neutron detection.

What’s the radiation tolerance of this board?
The board is rated for 1 Mrad total ionizing dose and 10^12 n/cm² neutron fluence. The components are latch-up protected and SEE immune. The board also includes MIL-STD-461G EMP protection.

Do I need to upgrade my DMP firmware for the enhanced diagnostics?
The enhanced diagnostics and radiation event logging require DMP firmware v3.0 or later. We can provide the firmware EPROMs if you need them.

Can I hot-swap this board?
No. Mark IV backplanes are not hot-swappable. The 1H1D has 6 securing screws—make sure they’re properly engaged before powering up.

What’s your warranty and lead time?
We stock the NMEA1H1D in limited quantities. Lead time is 2-3 business days. We offer a 2-year warranty. We test every board with a 48-hour burn-in, a thermal cycle (-55°C to +85°C), and a full diagnostic verification. The test report is included.

Is this board compatible with the Mark VIe?
No. This board is for Mark IV systems only. The backplane architecture is different.

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