Minute lecture pulse_switches

Pulse switches for houses and apartments Greater flexibility and more possibilities Guy Kasier E&D Systems January 2011 Leonardo ENERGY www.leonardo-energy.org

What are pulse switches?
Bistable relay
DIN-rail mounting
Operated by pushbutton
Often low safety driving current voltage
Used in controlling lights
Source: Eltako Leonardo ENERGY

Conventional installation Leonardo ENERGY www.leonardo-energy.org

Pulse switches Leonardo ENERGY www.leonardo-energy.org

Conventional installation
We want an extra switch for light point 1, next to switch 2.
To do this, we need to:
Add two wires between switches 1 and 2
Replace switch 2 with a double single-pole one
Problems:
If cable is used between 1 and 2: it is not possible
If tube with wire: sometimes possible (depending on type of tube and number of wires already present)
Leonardo ENERGY www.leonardo-energy.org

Conventional installation Leonardo ENERGY www.leonardo-energy.org

Pulse switches
We want an extra pushbutton for light point 1, next to pushbutton 2.
To do this, we need to:
Replace pushbutton 2 with a double pushbutton
Connect pushbutton 3 using the same wire as for pushbutton 1
Problems:
None

Pulse switches Leonardo ENERGY www.leonardo-energy.org

Additional pulse switches options (1)
Central on/central off
Group control on/off
Source: Eltako Leonardo ENERGY www.leonardo-energy.org

Additional pulse switches options (2)
Combined with timed relay
Short push: timed relay on
Push > 1 sec.: switch on
Push > 2 sec.: switch off
Possibility of warning before lamp goes out
30 sec. before time runs out
Example:
ES position: pulse switch
ER position: monostable relay
ESV position: timed relay
Source: Eltako Leonardo ENERGY www.leonardo-energy.org

Advantages
Increased flexibility of installation
Easy to adapt and extend
More options
Local control
Group controls
Central controls
Timed controls
Driving circuit usually low safety voltage
e.g. with 24V AC transformer
Less grinding and cutting work in the walls
Ceilings need not be perforated
Installation can be converted to an integrated home system with star topology

Disadvantages
A little bit more installation work
A little bit more expensive
To be considered in relation to advantages and options

Links
Catalogues from various manufacturers (Schneider Electric, ABB, Siemens, Legrand, Hager, etc.)
Website Eltako: www.eltako.com

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Minute lecture pulse_switches

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