DS3800HIOD | Mark V I/O Rack Expansion Module

Description

Product Introduction

The DS3800HIOD is the extreme-environment variant of the high-capacity I/O expansion board—it provides 64 additional I/O points with an extended operating temperature range of -40°C to +85°C. This board is designed for applications in the harshest environments: arctic installations, desert solar plants, and un-conditioned outdoor cabinets where temperature extremes are the norm. The HIOD retains the full 64 I/O point capacity of the HIOB, making it suitable for large expansions in extreme conditions.

We’ve used the HIOD in an arctic natural gas plant where winter temperatures drop to -45°C. The board’s extended temperature range ensured reliable operation throughout the winter, and the 64 I/O point capacity allowed us to add all the required I/O points without multiple expansion boards. The board integrated seamlessly with the main controller, and the expansion was completed without any issues. The HIOD is the board to choose when you need high-capacity expansion in extreme temperatures.

Key Technical Specifications

Compatible Replacement Models

Frequently Asked Questions (FAQ)

Q: What’s the advantage of the HIOD over the HIOB?
A: The HIOD has an extended operating temperature range of -40°C to +85°C, compared to the HIOB’s 0°C to 55°C. This makes the HIOD suitable for arctic, desert, and un-conditioned outdoor installations where temperature extremes are common. The HIOD retains the full 64 I/O point capacity of the HIOB.

Q: What components on the HIOD are rated for the extended temperature range?
A: The HIOD uses industrial/military-grade components, including capacitors, resistors, and integrated circuits, that are rated for -40°C to +85°C. The board also uses a different PCB material (high-Tg FR4) to withstand thermal cycling. The power supply and backplane interface are also designed for the extended range.

Q: How many I/O points can the HIOD support?
A: The HIOD supports up to 64 additional I/O points. This includes both analog and discrete I/O modules. If you need more than 64 points, you can use multiple HIOD boards, or combine HIOD and HIOB boards to achieve the required capacity.

Q: Can I use the HIOD with all Mark V I/O modules?
A: Yes, the HIOD is compatible with all Mark V I/O modules, including analog, discrete, frequency, and counter modules. The board provides the backplane interface for the modules to communicate with the main controller.

Q: Does the HIOD require additional power?
A: The HIOD draws power from the Mark V backplane. It does not require a separate power supply. The additional I/O modules connected to the expansion backplane will also draw power from the system’s power supply. Check your total power budget when adding expansion boards.

Q: Does the HIOD have conformal coating?
A: Not by default. The HIOD’s suffix typically indicates termination type, not coating. However, some HIOD variants may include conformal coating as an option. If you need conformal coating for harsh environments, look for a suffix with a “G” (e.g., DS3800HIOD1G1G). The standard HIOD is suitable for temperature extremes but may not resist corrosive conditions without coating.

Q: Can I use the HIOD to expand a Mark V system beyond its standard capacity?
A: Yes, the HIOD is specifically designed for system expansion in extreme environments. You can add multiple HIOD boards to expand the I/O capacity further. However, the total number of I/O points is limited by the Mark V controller’s addressing capacity. Check the system specifications before planning a large expansion.

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