Siemens S5-135U/155U System Manual page 420

Analog Input/Output Modules
Supply for the enable inputs from:
a) Battery
b) Terminals for 24 V on the front plate of the power supply
Common
Proper functioning is ensured if the 24 V load power supply has an output
Shutdown of the capacitance of at least 4700 F per 10 A of load current. Other units which
CC/EU and Load
do not meet this condition can be adapted to this requirement by connecting a
Power Supply with
10000 F /40 V capacitor in parallel.
a 230 V AC Supply
9-38
24 V supply for CC/EU and I/Os
CC/EU
Power Supply 24V
24 V DC
230 V AC
Load Power Supply 24V
a)
I/O Modules
F+
L+
L+
I/O Modules
F+
CC/EU
L+
Power Supply
C79000-G8576-C199-06
Battery
b)
10000 F/40V
System Manual