How Autoswitcher AS2000DR is fitted
inside feeder pillar.
connector to make external wiring. The following points should be
adhered to while making the connections.
electric load to be connected to the unit should not exceed 5A
(Resistive) at 230V/50 Hz. Since the load in practical applications is
never pure resistive, it should not exceed 2.5 A for general lighting
load like incandescent bulbs or fluorescent tubes. This factor of
safety is essential considering the starting surge currents.
load current is more than the specified, it is advisable to use
contactor. The unit can drive the contactor of any rating.
of 5A should be placed in series with the output cable to avoid the
accidental short. The unit does not have built-in fuse. It should be
clearly understood, in the event of overload or short, the unit will be
damaged if no external fuse is provided.
Placement of sensor is to be done very
judiciously. It should be preferably placed horizontally and outdoors
sensing the ambient light only. It should not receive the light from
the connected load.
The “TWILIGHT” setting is factory-calibrated at 16
to 20 lux which is satisfactory for a normal dusk-to-dawn operation
assuming the sensor is properly placed. In case a different setting is
desired, adjust the “TWILIGHT” control towards (+) for early on or (-)
for late on operations. It must be noticed that there is a limit to
adjust this setting to the extreme ends. If it is taken to extreme
negative end to switch the light at maximum darkness, even a slight
light from the connected load may switch off the load when on after the
delay time. Similarly, connected load will be continuously on if it is
taken to maximum positive side. Once this setting is done, it should not
be disturbed ever. Also, it is to be understood the unit is tracking
the set ambient light and not the time of the day for its on/off
The output of the unit is potential- free contacts and hence load to be
connected can be of AC or DC of any voltage upto 440V AC.
For the normal 230V-operated load, pin 1 (MAINS ‘0’) and pin 4 (OUTPUT)
are to be used as output to get mains supply to load while pin 2 (MAINS
‘230’) and pin 3(OUTPUT) are permanently shorted with suitable wire.