Digital I/O Module AFO4LE ABB

Description

The Digital I/O Module AFO4LE ABB is an industrial control product designed for reliable signal monitoring and management in automation systems. It features 8 digital input channels grouped as 1 set of 8, spanning DI0 to DI7, with terminal assignments ranging from 3.0 to 3.7 for signal channels and 2.9 to 4.9 for the shared reference potential terminal (negative supply voltage, signal name ZP). Each channel is equipped with a yellow status LED that illuminates when the input signal is at high level, providing clear visual feedback for signal status.

Key technical specifications include a signal rating of 120V AC/110V DC, an input impedance of 41.5kΩ, and individual channel isolation for enhanced system protection. It has a rated insulation voltage of 250V, with dielectric test voltages of 2300V AC between channel and ground, and 1350V AC between channels. The input voltage range defines “0” signal as 0 to 20V and “1” signal as 71 to 156V, with digitally selectable filter time from 0 to 100 milliseconds to reduce signal interference. It supports a maximum field cable length of 600 meters, and offers high-precision event recording with an accuracy range of -0.25 milliseconds to 1.0 millisecond and a resolution of 0.4 milliseconds. Typical power consumption is 4.9W, with a maximum current draw of 90mA from the +5V module bus and 0mA from the +24V module bus.