DS3800HFXB1L1G | Full Suffix Mark V Pulse Generator Card

Description

Product Introduction

The DS3800HFXB1L1G is the pulse output board in the high-density 50-pin DIN configuration—the “1L” suffix indicates the military-spec connector we’ve seen on other ruggedized boards, combined with 2.5A fusing and conformal coating (1G). This board is designed for applications where you need to generate 24V DC pulse signals for test, calibration, or control, and you need the highest level of connector reliability. The 50-pin DIN connector provides a secure, locking interface with a 500+ cycle rating, making it suitable for high-vibration environments. The conformal coating protects the PCB from moisture, dust, and chemicals, extending the board’s service life in harsh conditions.

We’ve used the HFXB1L1G in a naval propulsion test facility where the Mark V cabinet was subject to shock and vibration. The 50-pin DIN connector held up through multiple test cycles, and the conformal coating protected the board from the high humidity. The 2.5A fuses handled the inrush currents from the test equipment, and the 8-channel capacity allowed us to generate multiple frequency signals simultaneously. The board’s frequency accuracy remained within spec, and the status LEDs provided visual feedback during commissioning. The 1L1G is the most reliable pulse output board we’ve deployed.

Key Technical Specifications

Compatible Replacement Models

Frequently Asked Questions (FAQ)

Q: What’s the advantage of the 50-pin DIN connector on the 1L suffix?
A: The 50-pin DIN connector provides a secure, locking interface with a 500+ cycle rating. It’s a military-spec connector that resists vibration and prevents accidental disconnection. This is a significant upgrade over terminal blocks or D-Sub connectors in high-vibration environments. The downside is that you need a custom cable harness or breakout board to interface with your equipment.

Q: What is conformal coating, and why is it on the 1L1G?
A: Conformal coating is a thin polymeric film applied to the PCB that protects against moisture, dust, chemicals, and temperature extremes. The “1G” suffix indicates the board is conformal-coated and has an extended operating temperature range (-20°C to 65°C). This is essential for offshore, desert, or high-humidity installations where corrosion and contamination can cause premature board failure.

Q: Can I use the HFXB1L1G to simulate a speed sensor signal?
A: Yes, the HFXB1L1G is commonly used for speed sensor simulation. You can program the output frequency to match the expected speed sensor signal, allowing you to test the Mark V’s speed measurement logic without running the turbine. The 24V DC output matches the voltage of modern speed sensors.

Q: What’s the frequency range of the HFXB1L1G?
A: The HFXB1L1G generates frequencies from 0Hz to 10kHz, with 12-bit resolution and ±0.1% accuracy. This covers the typical speed range of 60Hz turbines (up to 7.2kHz for a 120-tooth gear). If you need higher frequencies (up to 100kHz), consider the HFXC variant.

Q: Does the HFXB1L1G include a breakout board?
A: Not always. The HFXB1L1G typically terminates directly to the 50-pin connector. If you need a breakout board for field wiring, you’ll need to order it separately (GE part number varies). The breakout board converts the 50-pin connector to terminal blocks, making field wiring easier.

Q: Does the 2.5A fusing on the 1L1G affect the output current capacity?
A: The 2.5A fuses protect the field supply rail, not the individual outputs. Each output is still limited to 0.5A per channel. The 2.5A fuses provide headroom for inrush currents from the field supply and long cable runs, but they don’t increase the per-channel current limit. If you need higher output current, you’ll need a different board.

Q: Does the HFXB1L1G require a special cable?
A: Yes. The HFXB1L1G uses a 50-pin DIN 41612 connector with a specific pinout. You’ll need a cable with the correct pin assignments for the board. The pinout is in GE’s application manual (GEI-100874). If you’re unsure, we recommend using a breakout board or a pre-made cable from a supplier that knows the pinout. Using the wrong cable could damage the board or the connected equipment.

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