The EL5101 module supports a wide range of input signal types, including:

24V digital inputs: These inputs can be used to read signals from devices that operate on a 24V digital logic level.

5V digital inputs: These inputs are compatible with devices that provide a 5V logic level. They can be used with sensors or devices that use 5V TTL (Transistor-Transistor Logic) or CMOS (Complementary Metal-Oxide-Semiconductor) logic.

24V differential inputs: These inputs are designed for differential signal inputs, which can provide better noise immunity and signal integrity in certain applications.

The EL5101 digital input module is typically used in industrial automation and control systems, where monitoring and control of digital signals are required. It can be integrated with other Beckhoff EtherCAT modules to create a distributed control system.