The BL20-4DI-24VDC-P (Ident-No: 6827012) is an electronic "slice" that handles digital signals from field devices like proximity switches, limit switches, or pushbuttons. It uses PNP (Positive) switching logic, meaning the input is activated when a +24V signal is received. This module is fieldbus-independent, meaning it can be used on any BL20 station regardless of whether the gateway is for DeviceNet, EtherNet/IP, or PROFIBUS.
