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Mounting and connection
4.5
Supply voltages
Power supply from SELV/PELV power supply unit!
SELV/PELV circuits (Safety Extra Low Voltage, Protective Extra Low Voltage) according to
IEC 61010-2-201 must be used to supply this device.
Notes:
• SELV/PELV circuits may give rise to further requirements from standards such as IEC 60204-1 et al, for
example with regard to cable spacing and insulation.
• A SELV (Safety Extra Low Voltage) supply provides safe electrical isolation and limitation of the voltage
without a connection to the protective conductor,
a PELV (Protective Extra Low Voltage) supply also requires a safe connection to the protective
conductor.
Observe the UL requirements
• When operating under UL conditions, observe the warnings in the chapter UL Requirements [} 21].
The EtherCAT Box has one input for two supply voltages:
• Control voltage U
The following sub-functions are supplied from the control voltage U
◦ the fieldbus
◦ the processor logic
◦ typically the inputs and the sensors if the EtherCAT Box has inputs.
• Peripheral voltage U
For EtherCAT Box modules with digital outputs the digital outputs are typically supplied from the
peripheral voltage U
function of the inputs and the supply of the sensors are maintained.
The exact assignment of U
Redirection of the supply voltages
The power IN and OUT connections are bridged in the module. Hence, the supply voltages U
passed from EtherCAT Box to EtherCAT Box in a simple manner.
Note the maximum current!
Ensure that the permitted current for the connectors is not exceeded when routing the supply voltages U
and U
:
P
M8 connector: max. 4 A
7/8" connector: max 16 A
Unintentional cancellation of the electrical isolation possible
In some types of EtherCAT Box modules the ground potentials GND
• If several EtherCAT Box modules are supplied with the same electrically isolated voltages, check
whether there is an EtherCAT Box among them in which the ground potentials are connected.
18
S
P
. U
can be supplied separately. If U
P
P
and U
can be found in the pin assignment of the I/O connections.
S
P
Version: 1.0
WARNING
CAUTION
S
is switched off, the fieldbus function, the
P
NOTICE
NOTICE
and GND
S
:
and U
s
are connected.
P
EP6080-0000
can be
p
S
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