System Supply Voltage - WAGO -I/O-SYSTEM 750 User's Installation And Configuration

12 • The WAGO-I/O-SYSTEM 750
Power supply
2.4.1

System supply voltage

The system supply voltage (24 V DC) is filtered with a voltage regulator be-
fore powering the coupler electronics as well as to the internal bus. Electrical
isolation from the external fieldbus system depends on the type of Cou-
pler/Controller.
The internal bus includes the internal communication between the cou-
pler/controller and the bus modules as well as the power supply for the bus
modules. The power supply is limited to a maximum value. This value de-
pends on the type of Coupler/Controller. If the sum of the internal power con-
sumption of all bus modules exceeds this value, it is necessary to add addi-
tional internal system supply modules (Order-No. 750-613).
The control electronics in the bus modules are powered by snap-fit mounting
the bus modules using the internal bus contacts. A reliable contact is assured
by the gold plated, self cleaning slide contacts. The removal of a bus module
will cause an interruption in communication to the following bus modules.
The coupler/controller identifies the interruption point and displays a corre-
sponding fault message.
Warning
Removing or inserting the I/O modules with the voltage applied can lead to
undefined conditions. For this reason only remove the I/O modules when iso-
lated from the power supply!
Modular I/O System
ETHERNET TCP/IP