LOGO! Manual
A5E00067781 01
178
8.6.2 Previous Solution
B1
L1
N
E1
E1
lx>
K6
E5
K5
E4
K4
E3
K3
E2
K3 K4
K5 K6
S1 S2
S3 S4
K1 K2
K2K2K1
The lights are operated by means of a current impulse
relay controlled by switches at the door. Independently of
this, they are reset by the time switch or by the brightness-
sensitive switch via the
central off
input. The switching-off
commands must be cut by interval time-delay relays so that
it is still possible to switch the lights on and off locally after
they have been switched off centrally.
Components required:
Switches S1 to S4
Daylight control switch B1
Time switch E1
Interval time-delay relays K1 and K2
Remote-control switches with central off K3 to K6
Disadvantages of the previous solution
To implement the required functions, a large amount of
circuitry is necessary.
The large number of mechanical components means
that considerable wear and high maintenance costs can
be expected.
Functional changes are costly to implement.
Applications
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