48 digital I/O lines

Interrupt triggering rising/falling edge

Output status readback

Pin-compatible with Opto-22 I/O module racks

Transfer rate: 300 Kb/sec typical, 400 Kb/sec. Maximum

Digital output: logic level 0: 0.5V max @ 24 mA sink

Digital input: Logic level 0: 0.8V max, Logic level 1: 2.0V min

Power requirement: +5V @ 500 mA (typical), +5V @ 800 mA (max)