The EL4014 analog output terminal generates analog output signals in the range between 0 and 20 mA. The power is supplied to the process level with a resolution of 12 bits and is electrically isolated. Ground potential for the output channels of the EtherCAT Terminal is common with the 24 V DC supply. The output stages are powered by the 24 V supply. The EL4014 has four channels. The EtherCAT Terminal indicates its signal state by means of light emitting diodes.

https://www.beckhoff.com/vi-vn/products/i-o/ethercat-terminals/el4xxx-analog-output/el4014.html