The EPP1xxx digital input modules are intended for the acquisition of digital/binary signals. Typically, these are mechanical contacts such as break contacts or make contacts, electronic sensors such as inductive proximity switches, optical sensors or other methods in order to generate a low/high signal in the sense of control technology. This signal is transmitted via EtherCAT to the higher-level automation device for further processing or for the control of the machine/plant. The module variants differ by different signal thresholds, number of channels, connection options and/or input filter times. The portfolio is rounded off by additional modules with XFC timestamp or combined input/output modules.