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Calculating the current consumption on an Example Coupler:

Internal current consumption

Residual current for bus modules

Sum I

(5 V) total

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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.

Observe total current of I/O modules, re-feed the potential if required!

If the sum of the I/O modules' internal current consumption exceeds the residual

current for I/O modules, then an internal system supply module must be placed

before the module where the permissible residual current was exceeded.

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Example:

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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 provide 1620 mA (see previous example) for the bus

modules. This value is given in the associated data sheet. Consequently, an

internal system supply module (750-613), e. g. in the middle of the node, should

be added.

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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

750-375 PROFINET IO advanced Fieldbus Coupler

380 mA at 5 V

1620 mA at 5 V

2000 mA at 5V

20 * 90 mA = 1800 mA

10 * 2 mA =