DS3800NHVD | Mark IV High-Voltage Digital I/O Module

Description

Product Introduction

The DS3800NHVD is a high-voltage digital interface board for Mark IV systems—the “H” in the suffix indicates high-voltage functionality, the “V” indicates voltage, and the “D” indicates digital. This board provides isolated high-voltage digital I/O connectivity for field devices in turbine control applications. It was used in installations where high-voltage digital signals needed to be interfaced with the Mark IV control system—typically for digital valve control, high-voltage solenoid drivers, or other field devices operating at higher voltages.

The board plugs into the Mark IV backplane and provides a high-voltage digital interface with electrical isolation to protect the backplane from voltage transients. Compare this to the DS3800NHVB (high-voltage interface board, not specifically digital) or the DS3800NIOA (standard I/O board). The NHVD is specifically for high-voltage digital applications where isolation and protection are critical.

Key Technical Specifications

Compatible Replacement Models

Frequently Asked Questions (FAQ)

What does the NHVD board do?
The NHVD is a high-voltage digital interface board for Mark IV systems. It provides isolated high-voltage digital I/O connectivity for field devices in turbine control applications.

What’s the difference between the NHVD and the NHVB?
The NHVD is specifically for digital I/O; the NHVB is a general high-voltage interface board. The NHVD has digital-specific I/O capabilities; the NHVB may have a different I/O configuration. Check your system documentation for the specific requirements.

What’s the voltage rating of this board?
The voltage rating depends on the specific configuration. Check the board’s label or your system documentation for the exact voltage rating. The NHVD was designed for high-voltage digital field device connectivity.

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 the most common failure mode on the NHVD?
We’ve serviced about a dozen NHVD boards. The most common failure is the high-voltage isolation circuitry—it can degrade over time, causing leakage or breakdown. The second most common failure is the edge connector—corrosion from humidity. The board is repairable.

What’s your warranty and lead time?
We stock the NHVD in limited quantities. Lead time is 1-2 business days. We offer a 1-year warranty. We test every board with a 24-hour burn-in and a 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.

A-B 22C-D260A103
ABB 5SHX2645L0006
GE IS220PPROS1B