LOGO! Manual
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Lighting system with a current impulse relay
When a current impulse relay is used, the lighting system
behaves as follows:
When any switch is pressed: the lighting is switched on
When any switch is pressed again: the lighting is
switched off
Disadvantage: people frequently forget to switch the lights
off.
Lighting system with an automatic lighting device
When an automatic device is used, the lighting system be-
haves as follows:
When any switch is pressed: the lighting is switched on
When the preset time has elapsed, the lights switch off
automatically.
Disadvantage: The lighting cannot be switched on for an
extended period of time (e.g. for cleaning purposes). The
permanent on switch is usually on the stairwell lighting
timer unit which may be difficult or impossible to gain ac-
cess to.
8.1.3 Lighting System with LOGO!
You can use a LOGO! module to replace the stairwell light-
ing timer or the current impulse relay. And you can imple-
ment both functions (timed off delay and current impulse
relay) in a single unit. What is more, you can incorporate
extra functions without making any alterations to the wiring.
Here are some examples:
Current impulse relay with LOGO!
Automatic stairway lighting system with LOGO!
LOGO! as a multifunctional switching system with the
following functions:
– Light on: Press switch
(Light switches off after the set time elapses)
– Permanent light on: Press switch twice
– Light off: Press switch for 2 seconds
Applications
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