36
System Description
WAGO-I/O-SYSTEM 750
750-375 PROFINET IO advanced Fieldbus Coupler
Manual
Version 1.1.0
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3.6.6
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
(see also table “WAGO power supply units”).
For brief voltage dips, a buffer (200 µF per 1 A load current) must be provided.
Power failure time not acc. IEC 61131-2!
Note that the power failure time of 10 ms acc. IEC 61131-2 is not maintained in a
maximum configuration.
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.
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Table 10: WAGO Power Supply Unit (Selection)
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
