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UNIT DESCRIPTION AND OPERATION
The PTWSP-250 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 PTWSP-250 operates with 120 or 277VAC
line voltage.
The sensor uses passive infrared technology to sense human motion, and
defines it as occupancy. A green 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 off or on manually, it stays off or on as long
as the sensor detects motion. After no motion is detected for the length of the
time delay, the sensor goes back to automatic operation. If the load was on, it
turns off. 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 and the Light
Level function is disabled.
This allows you to quickly
check the sensor coverage
area.
Override function:
In the event of unit failure
or if it is necessary to leave
the load on, remove the
Override Jumper plug. This
disables all automatic on and
off functions and the load can
Maximum = clockwise
only be operated using the
Minimum = counterclockwise
ON/OFF button.
Call 800.223.4185 for Technical Support
COVERAGE PATTERNS
The PTWSP-250 detects motion in areas up to 900 sq. ft. and up to 35 feet
from the sensor. Ideally, the sensor is designed for small amounts of motion
in spaces up to 300 sq. ft. The Fresnel lens on the sensor is a multiple
segment viewing lens with a field of view of 180°.
The sensor must have a
clear view of the people in
the space in order to detect
occupancy. Obstructions,
such as furniture blocking
the sensor's lens, may
prevent occupancy
detection.
35'
(10.7m)
Top View
15'
(4.6m)
4.0'
(1.2m)
floor
35'
Side View
(10.7m)
Masking the lens
Opaque adhesive tape is supplied so that
sections of the sensor's view can be masked.
This allows you to eliminate coverage in
unwanted areas.
Since masking removes bands of coverage,
remember to take this into account when
troubleshooting coverage problems.
Opaque tape
Visit our website: www.legrand.us
INSTALLATION
CAUTION
Turn the power off at the circuit breaker before installing the sensor.
1. If PTS Series Connector already exists in wall junction box, verify connector is
wired as stated below:
Black Wire (Connector) To
Line Hot Wire (Branch Circuit Wiring
Black Wire (Connector) To
Load Wire (Branch Circuit Wiring
Green Wire (Connector
To
G round Wire or Ground System
(Branch Circuit Wiring)
If this is a new installation and there is no existing PTS Series Connector in
the wall junction box, then wire according to the diagram below.
Note: Connector must be installed per NEC and shall be performed by a
qualified electrician.
Use only P&S PST Series
™
Connector. Do not connect or disconnect under
load.
2. Snap connector into PTWSP-250 device as shown.
3. Verify connector security and engagement.
4. Attach the sensor to the wall by mounting it in the wall box with the two
mounting screws provided.
5. Turn on power at the circuit breaker.
There is an initial warm‑up period after installation. It may take up to a
minute before the load turns on due to a sensor warm-up period during
initial power-up (this occurs during installation only). The load turns on after
the warm-up period ends if the sensor detects motion.
If the sensor fails to operate after the initial warm-up period, use a small
flat blade screwdriver to pry off button and slide the line power reversing
switch to the opposite position. This will re-initiate the warm-up period.
Call 800.223.4185 for Technical Support
Rapid successive pressing of the ON/OFF button causes a delay in function.
A single press of the button causes an immediate response. If the button
is pressed again within 2 seconds, the switch ignores it. Wait at least two
seconds between button presses.
6. Test the sensor using the procedure in the Sensor Adjustments section.
7. Replace wall switch cover plate.
Insert
Verify snap
engagement
View Showing
Rear of Sensor
Visit our website: www.legrand.us
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