28 System Description
WAGO-I/O-SYSTEM 750 XTR
750-352/040-000 FC ETHERNET G3 XTR
Manual
Version 1.3.0
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Example:
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Calculating the current consumption on an example coupler
Internal current consumption
300 mA at 5 V
Residual current for bus modules
700 mA at 5 V
Sum I
(5 V) total
1000 mA at 5 V
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The internal current consumption is indicated in the technical data for each bus
terminal. In order to determine the total requirement, add together the values of
all I/O modules in the node.
Please note the aggregate current for I/O modules. It may be necessary to
supply potential!
When the sum of the internal current consumption for the I/O modules exceeds
their aggregate current, you must use a supply module with bus power supply.
Install it before the position where the permissible aggregate current would be
exceeded.
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Example:
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Calculating the total current on the example coupler
A node with an example coupler consists e. g. of the following I/O modules:
20 relay modules (750-517) and 10 digital input modules (750-405).
Internal current consumption 10 * 90 mA = 900 mA
20 * 2 mA = 40 mA
Sum
940 mA
In this example, the example coupler can provide 700 mA for the I/O modules.
This value is given in the associated data sheet ("Total current for I/O modules").
Consequently, an internal system supply module (750-613), e. g. in the middle of
the node, should be added.
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The maximum input current of the 24 V system supply is 500 mA. The exact
electrical consumption (I
(V)
) can be determined with the following formulas:
