Siemens S5-135U/155U System Manual page 139

Selecting Cables
The following applies to selecting the cables for the terminals:
Power supply AC line
Relay terminals, also suitable
to 230 V AC / 3 A
Installing and For installing and removing the fan submodule, refer to the instructions in
Removing the Fan
Section 4.3.2 on the power supply unit. These also apply in principle here.
Submodule
Wiring up the Fan
FFor wiring up the fan submodule, refer to the instructions in Section 4.3.2
Submodule on the power supply unit. These also apply in principle here.
Switching on the The fan submodule is switched on when the line voltage for the central
Fan Submodule controller or expansion unit is switched on.
for the First Time
Caution
!
If you have set the voltage selector switch on the -3LA11 to 120 V, but the
actual voltage value is 230 V, the fan submodule may be damaged when line
voltage is switched on.
Fault Indications/ Fan submodule faults are indicated via relay contacts ("Monitor Output") and
Fault Diagnostics
an LED.
The following table shows when the relay contacts are open or closed:
Switched off
In normal operation
During fault
In the case of a fault, the red LED "Fan Fault" lights up.
System Manual
C79000-G8576-C199-06
Central Controllers and Expansion Units Power Supply Units
Terminals
Phase
Neutral
Protective conductor
Fan Submodule Relay Contact 1-2
open
closed
open
Cabling Max. Permissible Cable
Cross-Sections
2
L 1 4 mm solid or 2.5 mm
flexible
2
N 4 mm solid or 2.5 mm
flexible
2
4 mm solid or 2.5 mm
flexible
2
4 mm solid or 2.5 mm
flexible
Relay contact 2-3
closed
open
closed
2
2
2
2
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