HotRIO F-HEE-DIO-LVTTL-16IO

Datasheet for this board is available here

Axisymmetric view of the HotRIO F-HEE-DIO-LVTTL-16IO

Key features

  • 16 LVTTL channels with copper interfaces

  • Two banks of 8 channels, each bank independently configurable as input or output

  • Supports LVTTL voltage levels for both input and output

The F-HEE-DIO-LVTTL-16IO is a HotRIO Eurocard expansion module designed for flexible digital interfacing with a HotRIO controller board via a Eurocard Type A backplane. It provides sixteen fully isolated LVTTL channels, organized into two banks of eight channels each. Each bank can be independently configured as either input or output, allowing for a mix of input and output channels as required by the application.

Technical Specifications

Form factor

100x160 mm (Eurocard)

Mounting

Eurocard chassis

Backplane interface

HotRIO Type A

Digital channels

16 (LVTTL, fully isolated, configurable in 2 banks of 8 as input or output)

Isolation method

Line drivers

Input/output connector

DB-37 (front panel)

Power supply

5V DC (from backplane)

Power consumption

TBD W

Functionally, the F-HEE-DIO-LVTTL-16IO serves as a robust, transparent digital interface between the field-side DB-37 connector and the system backplane. Signals from the controller board’s FPGA enter via the backplane connector and are first conditioned by voltage level shifters (converting 1.8 V logic to 3.3 V LVTTL), followed by line buffers and drivers equipped with Schmitt triggers. This arrangement ensures clean, reliable signal transitions and high noise immunity.

All sixteen channels adhere to the LVTTL voltage standard, supporting low-voltage, high-speed digital signaling. The board’s architecture provides full electrical isolation between the backplane and the field wiring, significantly enhancing system safety and reducing susceptibility to electrical noise.

No onboard data processing occurs; instead, the board faithfully transmits signals between the controller and external devices, making it ideal for applications demanding flexible, isolated digital I/O with configurable directionality.