The EL4008 analog output terminal generate signals in the range between 0 and 10 V. The voltage is supplied to the process level with a resolution of 12 bits and is electrically isolated. The output channels of the EtherCAT Terminal have a common ground potential. The EL4008 combines eight channels in one housing. The output stages are powered by the 24 V supply. The signal state of the EtherCAT Terminal is indicated by light emitting diodes.
https://www.beckhoff.com/vi-vn/products/i-o/ethercat-terminals/el4xxx-analog-output/el4008.html