BECKHOFF EP9214-0023 - Manual (Page 25)

Mounting and cabling
Control voltage Us: 24 V
DC
Power is supplied to the fieldbus, the processor logic, the inputs and the sensors from the control voltage Us
(24 V
DC
). The control voltage is electrically isolated from the fieldbus circuitry.
Peripheral voltage Up: 24 V
DC
The peripheral voltage Up (24 V
DC
) supplies the digital outputs; it can be brought in separately. Hence, if the
load voltage is switched off, the fieldbus function as well as the supply and function of the inputs are
retained.
Electrical isolation
The grounds of the control voltage (GNDs) and peripheral voltage (GNDp) are electrically isolated from each
other in order to ensure the electrical isolation of the peripheral devices on Up from the control voltage.
Attention
The electrical isolation can be nullified
If you connect digital and analog EtherCAT Box Modules directly to one another via four-
pole power lines, then there may no longer be any electrical isolation due to the connected
boxes!
3.4 Status LEDs and status bits
Below is a table showing the meaning of the status LEDs and status bits for the power outputs (EP9214 for
example):
Fig. 22: EP9214 - status LEDs
Fig. 23: EP9214 - status bits
EP9214-0023 and EP9224-0023 25 Version 2.0.0