36
System Description
WAGO-I/O-SYSTEM 750
750-880, 750-880/025-000 ETHERNET Programmable Fieldbus Controller
Manual
Version 1.0.1
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3.6.6
Power Supply Unit
The WAGO-I/O-SYSTEM 750 requires a 24 V direct current system supply with
a maximum deviation of -15 % or +20 %.
Note
Recommendation
A stable network supply cannot be taken for granted always and everywhere.
Therefore, you should use regulated power supply units in order to guarantee the
quality of the supply voltage.
A buffer (200 µF per 1 A current load) should be provided for brief voltage dips.
Note
Power failure time is not acc. to IEC61131-2!
Note that the power failure time in a node with maximal components is not 10 ms,
according to the defaults of the IEC61131-2 standard.
The electrical requirement for the field supply is to be determined individually for
each power supply point. Thereby all loads through the field devices and bus
modules should be considered. The field supply as well influences the bus
modules, as the inputs and outputs of some bus modules require the voltage of the
field supply.
Note
System and field supply shall be isolated from the power supply!
You should isolate the system supply and the field supply from the power
supplies in order to ensure bus operation in the event of short circuits on the
actuator side.
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Table 6: WAGO Power Supply Unit
WAGO Power
Supply Unit
Description
787-612
Primary switched mode;
DC 24 V; 2,5 A Input nominal voltage AC 230 V
787-622
Primary switched mode;
DC 24 V; 5 A Input nominal voltage AC 230 V
787-632
Primary switched mode;
DC 24 V; 10 A Input nominal voltage AC 230/115 V
Rail-mounted modules with universal mounting carrier
288-809
AC 115 V/DC 24 V; 0,5 A
288-810
AC 230 V/DC 24 V; 0,5 A
288-812
AC 230 V/DC 24 V; 2 A
288-813
AC 115 V/DC 24 V; 2 A
