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Applications
IDEC SmartRelay Manual
284
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 pulse 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 al-
low 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 ex-
pected.
• The modification of functions involves considerable ef-
fort.
Courtesy of Steven Engineering, Inc. ● 230 Ryan Way, South San Francisco, CA 94080-6370 ● General Inquiries: (800) 670-4183 ● www.stevenengineering.com