DS3800HFXB1K1G | Full Suffix Mark V Pulse Generator Card

Description

Product Introduction

The DS3800HFXB1K1G is a pulse output board in a high-density configuration—the “1K” suffix indicates a 37-pin D-Sub connector, which 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, but you also need a reliable connector in harsh environments. The 37-pin D-Sub provides a secure, locking interface that’s easier to terminate in the field than the 50-pin DIN on the 1L variant. The conformal coating protects the PCB from moisture, dust, and chemicals, making the board suitable for offshore, desert, or high-humidity installations.

We’ve used the HFXB1K1G in a test cell that was exposed to humidity and salt spray from a coastal location. The D-Sub connector was easy to wire with standard tools, and the conformal coating kept the board functional despite the corrosive environment. 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 throughout the test campaign, and the status LEDs provided visual feedback during commissioning.

Key Technical Specifications

Compatible Replacement Models

Frequently Asked Questions (FAQ)

Q: What’s the advantage of the 37-pin D-Sub connector on the 1K suffix?
A: The 37-pin D-Sub connector provides a secure, locking interface that resists vibration and prevents accidental disconnection. It’s a standard industrial connector that’s easier to terminate than the 50-pin DIN, requiring only a soldering iron or crimp tool. The D-Sub connector is also more common in test and measurement applications, making it a practical choice for test cell use.

Q: What is conformal coating, and why is it on the 1K1G?
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 HFXB1K1G to simulate a speed sensor signal?
A: Yes, the HFXB1K1G 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 HFXB1K1G?
A: The HFXB1K1G 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: How do I program the frequency on the HFXB1K1G?
A: The frequency is set by the Mark V controller. The controller sends a frequency value to the HFXB via the backplane, and the board generates the corresponding pulse output. The specific register mapping is in GE’s application manual (GEI-100874). You’ll need to configure the Mark V to output the appropriate frequency values.

Q: Does the 2.5A fusing on the 1K1G 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 HFXB1K1G require a special cable?
A: Yes. The HFXB1K1G uses a 37-pin D-Sub 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 box 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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