Siemens S5-135U/155U - Manual (Page 101)

4-35
System Manual
C79000-G8576-C199-06
!
Caution
If you have set the voltage selector switch to 120 V, but the actual voltage
value is 230 V, the power supply unit may be damaged when line voltage is
switched on.
When you have made all the settings, switch the power supply unit on as
follows:
Step Action Result
1 Switch the power supply unit
on with the Power switch.
2 Switch the system voltage on. If the required basic load (see Section
4.4.6, Technical Specifications) is in
circuit, the power supply unit will start.
The green LEDs “5V o.k.”
“15V o.k.”
“24V o.k.” light up.
The fans run.
After a maximum of 6 minutes, the rechargeable battery has been charged
sufficiently for you to be able to start up the central controller or the
expansion unit.
The charge time for the rechargeable battery can be up to 46 hours,
depending on how low the battery was. Note that during this time, backup
using the rechargeable battery is restricted.
Once the rechargeable battery is fully charged, the following load-dependent
backup times apply:
I
backup
mA 0.25 1 2 3 4 5
Backup time in weeks 18.8 6.3 3.4 2.3 1.7 1.4
Switching on the
Power Supply Unit
for the First Time
How to Switch On
the Power Supply
Unit
Central Controllers and Expansion Units Power Supply Units