The EL2084 digital output terminal connects the binary 24 V DC control signals from the automation device on to the actuators at the process level with electrical isolation. The EtherCAT Terminal contains four channels whose signal state is indicated by LEDs.

Special features:

• ground switching
• Connection of different load types possible (ohmic, inductive, lamp load)
• Max. output current 0.5 A per channel
• Overload and short-circuit proof outputs and reverse polarity protection

https://www.beckhoff.com/vi-vn/products/i-o/ethercat-terminals/el2xxx-digital-output/el2084.html