Alignment - WAGO I/O System 750 Series Manual

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The WAGO-I/O-SYSTEM 750
Power Supply
Attention
Resetting the system by switching on and off the system supply, must take
place simultaneously for all supply modules (ECO coupler and 750-613).

2.7.2.2 Alignment

Recommendation
A stable network supply cannot be taken for granted always and everywhere.
Therefore, regulated power supply units should be used in order to guarantee
the quality of the supply voltage.
The supply capacity of the ECO coupler or the internal system supply module
(750-613) can be taken from the technical data of the components.
Internal current consumption*)
Residual current for bus termi-
nals*)
*) cf. catalogue W4 Volume 3, manuals or Internet
Example
The internal current consumption is indicated in the technical data for each bus
terminal. In order to determine the overall requirement, add together the val-
ues of all bus modules in the node.
Attention
If the sum of the internal current consumption exceeds the residual current for
bus modules, then an internal system supply module (750-613) must be
placed before the module where the permissible residual current was ex-
ceeded.
Example:
Current consumption via system voltage:
5 V for electronics of the bus modules and ECO
coupler
Available current for the bus modules. Provided by
the bus power supply unit. See ECO coupler and
internal system supply module (750-613)
ECO Coupler:
internal current consumption:350 mA at 5V
residual current for
bus modules :
sum I
(5V) total
A node with a PROFIBUS ECO Coupler consists of 10 relay modules
(750-517) and 20 digital input modules (750-405).
Current consumption:
10* 90 mA = 900 mA
20* 2 mA = 40 mA
Sum 940 mA
The ECO coupler can provide 650 mA for the bus modules. Conse-
quently, an internal system supply module (750-613), e.g. in the mid-
dle of the node, should be added.
650 mA at 5V
: 1000 mA at 5V
WAGO-I/O-SYSTEM 750
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