Siemens S5-135U/155U - Manual (Page 92)

4-26
System Manual
C79000-G8576-C199-06
Function Selection (X) Application/Note Setting Jumper
Mains buffering
FX-VA
6-22 closed
closed A stored energy time of 5 to 10 ms is
guaranteed in the event of a power
failure.
The stored energy time is dependent on
the input voltage and the load.
FX-VA
6-22 closed
open A stored energy time of 20 to 30 ms is
guaranteed in the event of a power
failure.
The stored energy time is not dependent
on the input voltage and the load.
FX-VA
6-22 open
irrelevant A stored energy time of
w 20 ms is
guaranteed in the event of a power
failure.
The stored energy time is dependent on
the input voltage and the load.
If your selection is the same as all the settings marked in bold print, you need
not change the jumper settings.
Wiring of the power supply unit must be planned within the scope of wiring
of the entire control system. The information required for the purpose and
decision-making aids, for example, for local or central grounding, can be
found in Chapter 3: Installation Guidelines.
Three relay outputs allow you to install additional external signaling circuits
for fault states, for example, to connect a cabinet lamp or horn.
The following table contains the information required on the relay states:
Relay
(Normal Operational State) (Fault State/Idle State)
Warning All fans are in order. One or more fans have failed.
Alarm Adequate air flow, at least two fans are running. Inadequate air flow or at least two fans have
failed.
BatteryWarn
ing Lithium battery and rechargeable battery are in
order (U
batt ext
not connected).
Lithium battery or rechargeable battery has failed
(no U
batt ext
).
Establishing the
Wiring
Establishing the
Signaling Circuits
Central Controllers and Expansion Units Power Supply Units