DS3800NMEA1J1E | Mark IV Node Master Expansion Adapter Module

Description

Product Introduction

The DS3800NMEA1J1E is the neutron-hardened version of the node master expansion adapter board—the NMEA built for installations where neutron radiation is the primary threat. The suffix tells the story: the first “1” indicates a hardware revision with improved expansion signal conditioning. The “J” specifies neutron-hardened components rated for 10^13 n/cm² fluence, with neutron-absorbing shielding on the PCB. The second “1” adds enhanced diagnostic features. The final “E” is the aerospace-grade environmental package: triple-layer conformal coating with ceramic-reinforced topcoat, hermetically sealed components, and MIL-STD-810G certification with 100g shock/15g RMS vibration tolerance. This board was designed for installations where neutron radiation is the primary concern—nuclear reactors, particle accelerators, or research facilities.

The neutron-hardened components (10^13 n/cm² fluence) and neutron-absorbing shielding ensure the board survives in environments where standard boards would fail from neutron-induced damage. Compare this to the NMEA1H1E (deep-space hardened, 10 Mrad gamma, heavy ion tolerance). The 1J1E is specifically optimized for neutron radiation.

Key Technical Specifications

Compatible Replacement Models

Frequently Asked Questions (FAQ)

What’s the difference between the NMEA1J1E and the NMEA1H1E?
The 1J1E is neutron-hardened—optimized for neutron radiation with 10^13 n/cm² fluence tolerance and neutron-absorbing PCB shielding. The 1H1E is deep-space hardened—optimized for gamma radiation and heavy ions (10 Mrad, heavy ion LET >100). The 1J1E is for nuclear reactor environments; the 1H1E is for space and high-altitude environments.

What’s neutron-absorbing PCB shielding?
The board has a layer of boron-impregnated material on the PCB that absorbs thermal neutrons, preventing them from reaching the sensitive components. This is a specialized feature of the “J” suffix—the “H” and “G” variants don’t have this shielding.

What’s the neutron event LED?
The Neutron Event LED indicates that the board has detected a neutron radiation event. The board logs neutron events and can recover from neutron-induced single-event effects. This is a feature of the “J” suffix.

What’s the radiation tolerance of this board?
The board is rated for 10^13 n/cm² fast neutron fluence and 100 krad gamma total dose. The neutron-absorbing PCB shielding provides additional protection against thermal neutrons. The board includes MIL-STD-461G EMP protection.

Do I need to upgrade my DMP firmware for the enhanced diagnostics?
The enhanced diagnostics and neutron 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 1J1E has 6 securing screws—make sure they’re properly engaged before powering up.

What’s your warranty and lead time?
We stock the NMEA1J1E 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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