DS3800NGRA1L1E | GE Speedtronic General Purpose Remote Adapter

Description

Product Introduction

The DS3800NGRA1L1E is the aerospace-grade version of the dual-radiation-hardened remote adapter—the NGRA built for installations where neutron radiation, gamma radiation, and aerospace-grade environmental requirements all apply. The suffix tells the story: the first “1” indicates a hardware revision with improved signal conditioning. The “L” specifies combined neutron + gamma hardening: 10^13 n/cm² neutron fluence tolerance and 10 Mrad gamma total dose, with neutron-absorbing shielding and radiation-hardened components. The second “1” adds enhanced diagnostic features. The final “E” is the aerospace-grade environmental package: triple-layer conformal coating with ceramic-reinforced topcoat, radiation-hardened electronics, and MIL-STD-810G certification with 100g shock/15g RMS vibration tolerance. This board was designed for the most extreme aerospace and high-altitude applications where mixed radiation is a concern.

The combined neutron + gamma hardening ensures the board survives in environments where both types of radiation are present. The aerospace-grade components and ceramic-reinforced coating protect against the most extreme conditions. Compare this to the NGRA1L1D (same combined neutron + gamma hardening, but military-grade components with 75g shock/8g vibration). The 1L1E adds radiation hardening, the ceramic topcoat, and higher shock/vibration tolerance.

Key Technical Specifications

Compatible Replacement Models

Frequently Asked Questions (FAQ)

What’s the difference between the NGRA1L1E and the NGRA1L1D?
The 1L1E adds aerospace-grade components, radiation hardening, ceramic-reinforced topcoat, and higher shock/vibration tolerance (100g/15g versus 75g/8g). The 1L1D is military-grade; the 1L1E is aerospace-grade. The 1L1E also includes radiation event logging for gamma—the 1L1D has neutron and gamma event logging but not general radiation event logging.

What’s the ceramic-reinforced topcoat?
The third layer of conformal coating contains ceramic micro-particles that resist scratching and abrasion. This protects the board during maintenance in tight cabinets where tools or cable bundles might contact the PCB. The ceramic topcoat also provides slightly better salt-spray resistance.

What’s the radiation event LED?
The Radiation Event LED indicates that the board has detected a general radiation event—either neutron, gamma, or other ionizing radiation. The board logs radiation events and can recover from radiation-induced single-event effects. This is a feature of the “E” suffix—the “D” variant has separate neutron and gamma event LEDs but not a general radiation event LED.

What’s the radiation tolerance of this board?
The board is rated for 10^13 n/cm² fast neutron fluence and 10 Mrad 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 radiation event logging require DMP firmware v3.0 or later. We can provide the firmware EPROMs if you need them.

How is the NGRA configured?
The NGRA is configured via jumpers on the board or through firmware settings. If you’re replacing a failed NGRA, photograph the jumper settings before removing the old board.

Can I hot-swap this board?
No. Mark IV backplanes are not hot-swappable. Power down the cabinet, lock out the breaker, and wait 60 seconds before removing or installing the board.

What’s your warranty and lead time?
We stock the NGRA1L1E 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), a vibration test on our shaker table, 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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