The EL9508 power supply terminal takes the input voltage (24 V DC) and uses it to generate an output voltage of 8 V DC at 0.5 A, which can be tapped at the terminal. The following EtherCAT Terminals are also supplied with this voltage via the power contacts. The power LEDs indicate the operating states of the terminals, short-circuits or overloads are indicated by the overcurrent LEDs. The status is also displayed in the process image. The input voltage and the output voltage U0 are not electrically isolated.

https://www.beckhoff.com/vi-vn/products/i-o/ethercat-terminals/el9xxx-system/el9508.html