The EL1034 digital input terminal acquires the binary 24 V DC 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.

Special features:

• input specification type 1
• low delay due to fast 10 µs input filter
• usable, for example, for inductive or capacitive sensors
• direct connection of four 2-wire sensors via additional 0 V connection points
• electrical isolation of individual channels, potential-free

https://www.beckhoff.com/vi-vn/products/i-o/ethercat-terminals/el1xxx-digital-input/el1034.html