UNIT DESCRIPTION AND OPERATION
The WS‑301 and WS‑301‑347 PIR Wall Switch Occupancy Sensors turn lighting
or fan loads ON and OFF based on occupancy and ambient light level. They are
designed to replace a standard light switch. The WS‑301 operates with 120 or
277VAC line voltage and the WS‑301‑347 operates with 347VAC line voltage. All
other features are the same in both models. (Throughout this manual, “WS” is
used to indicate either sensor.)
The sensor uses passive infrared technology to sense human motion, and
defines it as occupancy. A red LED on the sensor blinks upon occupancy and
then resets. It will blink again when it detects motion after the 2‑second reset.
The sensor turns ON the load automatically when it detects occupancy.
Once the space is vacant and the time delay elapses, it turns OFF the load
automatically.
If adequate ambient light is already present in the area, the sensor will hold
OFF the load it controls. When the light drops below a field selectable level and
the sensor detects occupancy, the sensor turns ON the load. Once turned ON,
the load remains ON until the space is vacant or the light level rises above the
setpoint and the time delay expires.
Manual Operation:
The occupant can press the ON/OFF button to turn the load
ON and OFF. When the load is turned ON manually, the sensor will keep the
load ON until no motion is detected for the length of the time delay. If the load
is turned OFF manually, the
sensor holds the load OFF until
no motion has been detected for
the duration of 5 minutes. The
next time the sensor detects
occupancy and the ambient light
is lower than the set level, the
sensor automatically turns ON
the load.
Walk‑test feature:
When the Time Delay trimpot
is in the fully counterclockwise
position, the sensor has a 30
second time delay. This allows
you to quickly check the sensor
coverage area.
Service function:
In the event of unit failure or if
it is necessary to leave the load
ON, remove the Service Jumper plug. This disables all automatic ON and OFF
functions and the load can only be operated using the ON/OFF button.
Call 800.879.8585 for Technical Support
ON/OFF
Switch
Service
Jumper
Light Level
Time Delay
Sensitivity
LED
Fresnel Lens
ON/OFF Button
(Switch Cover)
Press down
on tab and
pry off Cover
(L)
(T)
(S)
Maximum = clockwise
Minimum = counterclockwise
