Applications
8.6.2
Previous solution
L1
lx>
B1
E1
E1
K1
K2
N
The lamps are switched on and off with current impulse
relays, by means of pushbutton control at the door.
Regardless of this, they are reset with a timer or daylight
control switch signal at the central off input. The pulse width
of the off commands must be reduced by means of interval
time-delay relays to allow operation of the lights after they
are switched off.
Components required:
•
Pushbuttons S1 to S4
•
Daylight control switch B1
•
Timer E1
•
Interval time-delay relays K1 and K2
•
Pulse switches K3 to K6 with central OFF function
Disadvantages of the previous solution
•
A substantial amount of switchgear needs to be installed
to implement the necessary functions.
•
Due to the large number of mechanical components, high
wear and tear and maintenance expenditure is to be
expected.
•
The modification of functions involves considerable
effort.
290
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S1
S2
K1
K2
K3
K4
S3
S4
K2
K3
K4
K5
K6
E2
E3
IDEC SmartRelay Manual
K5
K6
E4
E5