Previous Solution - Siemens LOGO! 24RC Manual

Applications

8.6.2 Previous Solution

L1
lx>
B1
E1
E1
K1 K2
N
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.
178
K1 K2 S1 S2
K3 K4
S3 S4
K2 K3
K5 K6 E2
A5E00067781 01
K4 K5 K6
E3 E5
E4
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