WAGO I/O-SYSTEM 750 Manual page 27

WAGO-I/O-SYSTEM 750
750-354/000-001 EtherCAT® Fieldbus Coupler, ID Switch
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
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
Sum
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.
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
300 mA at 5 V
700 mA at 5 V
1000 mA at 5 V
10 * 90 mA =
20 * 2 mA =
) can be determined with the following formulas:
(V)
System Description
900 mA
40 mA
940 mA
®
software to configure
Version 1.2.1
27
Manual