IDEC FL1E SmartRelay - Manual (Page 304)

Applications
290 IDEC SmartRelay Manual 
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
K2 K2 K1
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.