The 3512 is an eight channel non-isolated digital I/O board with +5V tolerant 74LCX14 inputs with hysteresis and +3.3V CMOS 74LVTH125 driven outputs. Each I/O line features a series 10 ohm damping and protection resistor and a 4.7K pull up resistor to +3.3V. On power up the outputs are tri-stated, and can then be enabled on a bit by bit basis. Output high drive is 32mA @ 2.0V minimum. Output low drive is 32mA @ 0.8V maximum.

In the block diagram below one complete circuit of the eight on the board is driving customer digital circuits. Note that each I/O line is provided with a corresponding GND on the I/O connector. A serial identification circuit prevents use with incorrect FPGA IP. Other applications include driving small loads such as LEDs or reed relays. When driving small inductive loads like reed relays transient suppression must be employed and the drive voltage should not exceed 5 volts.

The I/O connections are broken out using a Technobox transition panel. Using a P/N 1866 panel, for example, this application would use four (4) of sixteen RJ11 connections. I/O from other ECMs installed on the carrier could use the remaining twelve.

A serial identification circuit prevents use with incorrect FPGA IP. Typical RS232 usages include military, medical, transportation and industrial control

Datasheet http://www.technobox.com/Datasheet-ECM-3512-Digital-4pgv3-A80401-press.pdf

micro mezzanine system electrical conversion module digital i/o eight channel eight bit Technobox 3512