User Manual

Applications
IDEC SmartRelay Manual 265
8.1 Stairway or corridor lighting
8.1.1 Requirements for a stairway lighting system
The basic requirements for a stairway lighting system are as
follows:
• When someone is using the stairway, the lighting should
be switche
d on.
• If no-one is in the stairway, the lights should be switched
off in
order to save energy.
8.1.2 Previous solution
The two conventional options for switching the lights:
• With a current impulse relay
• With an automatic stairwell light switch
The wiring of both these lighting systems is identical.
Lights
Distribution box
Push-
buttons
Distribution with
Current impulse
relay
or
automatic 
stairwell
light switch
Components used
• Momentary switches
• Automatic stairwell light switch or
current impulse relay