Mounting and cabling
EP4374
17
Version: 2.3
3.2.1
Power supply
The EtherCAT Box is supplied with two supply voltages. The supply voltages are electrically isolated in the
EtherCAT Box.
• The control voltage U
S
is the supply voltage for:
◦ processor logic
◦ fieldbus logic
◦ analog inputs and outputs
• The peripheral voltage U
P
is the supply voltage for:
◦ External sensors: M12 sockets 1 and 2
◦ External actuators: M12 sockets 3 and 4
3.2.1.1
Connection
NOTE
Supply voltages can destroy EtherCAT interfaces
Connectors for supply voltages have the same design as connectors for EtherCAT. They are not protected
against mismating.
Avoid mismating.
Observe the color coding of the connectors:
Power supply: black
EtherCAT: green
Two M8 connectors at the low-end of the modules are used for feeding and routing the supply voltages:
• IN: left M8 connector for feeding the supply voltages
• OUT: right M8 connector for forwarding the supply voltages
Fig. 5: Connections for power supply
Pin assignment
Fig. 6: M8 connector
Pin
Voltage
Core colors
1)
1
Control voltage U
S
Brown
2
Peripheral voltage U
P
White
3
GND
S
Blue
4
GND
P
Black
1)
The core colors apply to Beckhoff ZK2020-xxxx-xxxx cables
