Abaco Systems / SBS / Greenspring IP-UNIDIG-I IndustryPack with 24 Differential I/O Lines and Interrupts

The Abaco Systems IP-UNIDIG-I is a single-wide Type I IndustryPack module providing 24 individually programmable differential I/O lines for industrial digital I/O applications. Each line operates independently as either input or output, with EIA-422 and EIA-485 compliance and an extended common mode range of +12 V to -7 V. The module features double buffering for both inputs and outputs - critical for simulation systems requiring simultaneous latching of multiple signals - and supports interrupt generation on any input line via five 24-bit registers.

Output drivers employ open-collector transistor architecture with 1 kOhm pullup, capable of sinking up to 64 mA continuous load current. Input drivers accept ±15 V / -5 V signals with 1.25 V logic threshold and 50 mV hysteresis. Socketed 100 Ohm termination resistors (factory default) across each differential pair allow user modification or removal.

Technical Specifications

• Form Factor: Single-wide Type I IndustryPack (1.8 × 3.9 inches)


• IndustryPack Interface: ANSI/VITA-4 compliant, 8 MHz, zero wait states


• Digital Lines: 24 differential I/O, individually configurable


• Input Specification: +15 V / -5 V range, 1.25 V threshold, 50 mV hysteresis


• Output Specification: Open-collector, 64 mA continuous sink current


• Differential Standards: EIA-422 and EIA-485


• Common Mode Range: +12 V to -7 V


• Double Buffering Clock: Selectable 8 MHz internal or external source with programmable polarity


• Power Consumption: +5 VDC, 510 mA typical (no load)


• Operating Temperature: 0 to +70°C


• Storage Temperature: -40 to +85°C


• Humidity: 5 to 95% non-condensing


• Weight: 0.06 kg

Key Features

• Interrupt capability on any input line via configurable 24-bit registers


• Master/slave synchronization mode; master redrives external clock via I/O line 23


• ESD protection via LineSafe technology (IP-UNIDIG-I-E variant)


• User-selectable termination resistor values

Typical Applications

• Multi-channel simulation and real-time control systems


• Industrial process monitoring with synchronized I/O latching


• Distributed IndustryPack clusters requiring clock-synchronous operation

Compatibility & Integration IndustryPack carriers implementing ANSI/VITA-4 architecture support this module.