Siemens S5-135U/155U System Manual page 435

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
System Manual
C79000-G8576-C199-06
24 V supply for CC/EU and I/Os
CC/EU
Power Supply 24V
24 V DC
CC/EU
Power Supply
230 V AC
Load Power Supply 24V
Analog Input/Output Modules
a)
Battery
b)
I/O Modules
F+
L+
L+
I/O Modules
F+
L+
10000 F/40V
9-53