WAGO -I/O-SYSTEM 750 Manual page 31

WAGO-I/O-SYSTEM 750
750-882 Media Redundancy ETHERNET Controller
Example:
Calculating the current consumption on an Example Coupler:
Internal current consumption
Residual current for bus modules
Sum I
(5 V) total
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.
Example:
Calculating the total current on the example coupler described above:
A node with the example coupler, which is described above, consists of:
20 relay modules (750-517) and 10 digital input modules (750-405).
Internal current consumption
Sum
The example coupler can only provide 1620 mA (see previous example) for the
I/O modules. This value is given in the associated data sheet. Consequently, an
internal system supply module with bus power supply (750-613), e. g. in the
middle of the node, should be added.
Recommendation
Utilize the smartDESIGNER feature WAGO ProServe
fieldbus node assembly. You can test the configuration via the integrated
plausibility check.
The maximum input current of the 24 V system supply is 500 mA. The exact
electrical consumption (I
380 mA at 5 V
1620 mA at 5 V
2000 mA at 5V
20 × 90 mA = 1800 mA at 5 V
+ 10 × 2 mA =
) can be determined with the following formulas:
(V)
System Description
20 mA at 5 V
1820 mA at 5 V
®
software to configure
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Manual
1.5.0