750-841 WAGO, 750-841 Datasheet - Page 34

• Manufacturer Part Number: 750-841
• Description: CONTR.ETHERNET TCP/IP 10/100MBIT
• Manufacturer: WAGO

Specifications of 750-841

• Rohs Compliant: YES
• No. Of Digital Inputs: 10
• No. Of Digital Outputs: 10

26 •
2.7.2.2 Alignment
The WAGO-I/O-SYSTEM 750
Power Supply
The supply capacity of the coupler/controller or the internal system supply
module (750-613) can be taken from the technical data of the components.
The internal current consumption is indicated in the technical data for each
bus terminal. In order to determine the overall requirement, add together the
values of all bus modules in the node.
Attention
Resetting the system by switching on and off the system supply, must take
place simultaneously for all supply modules (coupler/controller and
750-613).
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.
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
exceeded.
Internal current consumption*)
Residual current for bus
terminals*)
*) cf. catalogue W4 Volume 3, manuals or Internet
Example
Example:
A node with a PROFIBUS Coupler 750-333 consists of 20 relay
modules (750-517) and 10 digital input modules (750-405).
Current consumption:
20* 90 mA = 1800 mA
10* 2 mA =
Sum
The coupler can provide 1650 mA for the bus modules. Consequently,
an internal system supply module (750-613), e.g. in the middle of the
node, should be added.
1820 mA
Current consumption via system voltage:
5 V for electronics of the bus modules and
coupler/controller
Available current for the bus modules. Provided by
the bus power supply unit. See coupler/controller
and internal system supply module (750-613)
Coupler 750-301:
internal current consumption:350 mA at 5V
residual current for
bus modules :
sum I(5V)
total
:
20 mA
1650 mA at 5V
2000 mA at 5V
WAGO-I/O-SYSTEM 750
ETHERNET TCP/IP