The EL1124 digital input terminal acquires the binary 5 V control signals from the process level and transmits them, in an electrically isolated form, to the higher-level automation unit. The EtherCAT Terminal has four channels that indicate their signal state via light emitting diodes. The 5 V supply voltage can be generated with the EL9505 power supply terminal, and fed into the power contacts.

Special features:

• 5 V inputs
• low delay due to fast 0.05 µs input filter
• fast CMOS inputs
• +5 V and 0 V sensor supply connections

https://www.beckhoff.com/vi-vn/products/i-o/ethercat-terminals/el1xxx-digital-input/el1124.html