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BETA Switching
Timers
7
LF4 digital time switches
9/3
Siemens ET B1 · 10/2008
9
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Overview
These days, time switching is taken for granted.
In fact, it is now hard to imagine many process sequences and
energy saving processes without time switching. It could also be
argued that time switching satisfies a basic need.
The new generation of digital time switches have a much more
diverse range of functions than earlier devices and, thanks to
better solutions, are simpler to operate.
They can be used for switching systems or system components,
or for a whole range of functions, such as: irrigation systems,
greenhouses, public gardens, swimming pools, filtering installations,
canopy controls, school bells, church bells, shop window lighting,
advertising lighting, gym lighting, traffic signal controls, street
lighting, illuminated signs, office lighting, lighting of stairwells
and entrances, object illumination, preheating of industrial
furnaces, spraying machines, ovens, heating systems, air-
conditioning systems, fans and ventilation systems, heating and
circulation pumps and sauna systems.
All devices have the VDE mark and are approved to UL.
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Benefits
•
The menu-assisted operation with background lighting,
contrast setting of the display and illuminated keys offer a
clear overview for any application
•
The text-assisted programming of the time switches with their
logical 4 pushbutton system and extremely intuitive menu-driven
handling saves time
•
Simple programming on the PC enables the fast creation of
complicated switching programs, thus saving time and
eliminating errors
•
Data keys enable the transfer of programs to the switch key,
thus saving huge amounts of time during commissioning and
maintenance
•
Intuitive operation of 5-way joystick.
© Siemens AG 2008