Power Supply Unit - WAGO I/O-SYSTEM 750 Manual

36 System Description
3.5.6

Power Supply Unit

The WAGO-I/O-SYSTEM 750 requires a 24 VDC voltage (system supply).
Recommendation
A stable power supply cannot always be assumed everywhere. Therefore, you
should use regulated power supplies to ensure the quality of the supply voltage.
For brief voltage dips, a buffer (200 µF per 1 A load current) must be provided.
Buffer for system power supply!
The system power supply must be buffered to bridge power outages. As the
power demand depends on the respective node configuration, buffering is not
implemented internally.
To achieve power outages of 1 ms to 10 ms according to IEC61131-2, determine
the buffering appropriate for your node configuration and structure it as an
external circuit.
The power demand must be determined individually depending on the entry point
of the field supply. All loads through field devices and I/O modules must be taken
into account. The field supply also impacts the I/O modules because the input
and output drivers of some I/O modules require the voltage of the field supply.
System and field supply must be isolated!
The system supply and field supply must be isolated to ensure bus operation in
the event of short circuits on the actuator side.
Power supply units are available in the eShop.
You can find suitable power supply units, e. g. from the EPSITRON series, in the
eShop on www.wago.com.
Manual
Version 1.2.1
750-354/000-001 EtherCAT® Fieldbus Coupler, ID Switch
WAGO-I/O-SYSTEM 750