Lighting System With Logo - Siemens LOGO! Series Manual

Applications
Lighting system with a pulse relay
When a pulse relay is used, the lighting system behaves as follows:
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When any switch is pressed: The lighting is switched on
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When any switch is pressed again: The lighting is switched off.
Disadvantage: People often forget to switch the light off again.
Lighting system with an automatic lighting device
When an automatic device is used, the lighting system behaves as follows:
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When any switch is pressed: The lighting is switched on.
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After a preset time has elapsed, the lighting is switched off automati-
cally.
Disadvantage: The lighting cannot be switched on for an extended period
of time (e.g. for cleaning purposes). The switch for permanent lighting is
usually on the automatic device, which is either impossible or difficult to
access.

5.1.3 Lighting system with LOGO!

If you use LOGO!, you can replace the automatic lighting device or the
pulse relay. You can implement both functions (time-dependent switching-
off and pulse relay) using a single device. You can also include additional
functions without changing the wiring. Here are some examples:
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Impulse relay with LOGO!
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Automatic stairway lighting system with LOGO!
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LOGO! as a multi-function switching system with the following func-
tions:
– Light on:
(Light switches off after the set time elapses)
– Permanent light on: Press switch twice
– Light off:
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Press switch
Press switch for 2 seconds
LOGO! manual
EWA 4NEB 712 6006-02