WAGO-I/O-SYSTEM 750 XTR
Connect Devices
49
750-xxxx/0040-xxxx Design Notes /XTR
Manual
Version 1.2.0
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6.5.7
Power Supply Units
The WAGO-I/O-SYSTEM 750 XTR requires 24 VDC voltage (system supply)
for operation.
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.
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.
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Table 19: WAGO Power Supply Units
Item number
Description
787-822/xxx-xxx Primary switch-mode power supply
EPSITRON
®
PRO Power,
24 VDC / 5 A
*)
, nominal input voltage 100 VAC … 240 VAC
787-832/xxx-xxx Primary switch-mode power supply
EPSITRON
®
PRO Power,
24 VDC / 10 A
*)
, nominal input voltage 110 VAC … 240 VAC
787-840/xxx-xxx Primary switch-mode power supply
EPSITRON
®
PRO Power,
24 VDC / 10 A
*)
, nominal input voltage 3×
400 VAC … 500 VAC
*)
Derating
−
3 %/K > +50 °C
