Legrand FS-755 Wide-Angle PIR Sensor Installation guide

SPECIFICATIONS

Power Supply.................. 120VAC, 60Hz or 277VAC, 60Hz

Maximum load rating

@120VAC ....................... 800W max ballast or tungsten

@277VAC ......................................... 1200W max ballast

Horsepower .......................................................... 1/6hp

Dimensions ......... 2.16” front to back x 2.68” W x 1.77” H

(55mm front to back x 68mm W x 45mm H)

Weight ................................................. 2.17 oz. (60 grams)

Environment

Operating temperature .........32° to 131°F (0° to 55°C)

Storage temperature .......‑22° to 158°F (‑30° to 70°C)

Detection indicator .......................................... Green LED

DESCRIPTION

The FS‑755 is a passive infrared (PIR) occupancy sensor

designed to contol lighting where wide‑angle 180° coverage

is desired. It is ideally suited for use in aisleways with

refrigeration systems and freezer cases, vending machines

and display areas. It is designed to turn on cabinet lights

when it detects people in the aisle, then turn the lights off

when the aisle is vacant, after a time delay expires.

It is a line voltage device that controls either 120VAC or

277VAC loads. The FS‑755 fits in a single‑gang wall box and

can be trimmed with a decorator cover plate (not included).

Coverage Pattern

The sensor contains dual pyros and a lens providing 40

detection zones, ensuring dense coverage within the

detection area. The sensor provides true 180° horizontal and

70° vertical coverage.

Side View of coverage pattern

1’

7’

6’

5’

4’

3’

2’

1’2’3’

(0.91m)

4’5’6’

(1.82m)

7’8’9’

(2.74m)

10’11’12’

(3.66m)

13’14’15’

(4.57m)

Maxi mu m Se ns it iv it y

Mi ni mu m Se ns it iv it y

Sensor Mounting Height

Distance

Sensor at

7.5’ (2.286m)

FS‑755

Wide‑Angle

Occupancy Sensor

Passive Infrared • Line Voltage

Installation Instructions

Top View of coverage pattern

13’

1’

3’

5’

(1.52m)

7’

9’

11’

(3.35m)

2’4’

(1.22m)

6’8’

(2.43m)

10’12’

(3.66m)

14’

15’

(4.57m)

3’

13’

9’

7’

5’

(1.52m)

1’

30’ x 15’ Maximum Sensitivity

24’ x 12’ Minimum Sensitivity

Sensor

15’

(4.57m)

11’

(3.35m)

15’

(4.57m)

www.wattstopper.com Call 866.588.5473 for Technical Support

INSTALLATION

1. Determine an appropriate mounting location for the

FS‑755. For customer display cases, the sensor should be

located above the center of the unit. For walk‑in freezers

or refrigerators, it should be centered above the entry door.

FS-755 centered above front

edge of cabinet, behind

decorator style single-gang

wall plate

Figure 1: Installing above a freezer unit

33mm

1.30”

22mm

0.86”

1.77’

45mm

68mm

2.68”

32mm

1.28”

2. Install a single‑gang wall switch box horizontally in the

mounting location.

3. Connect wiring to the FS‑755 according to the WIRING

instructions.

4. Attach the FS‑755 to the wall switch box using the screws

provided.

5. Attach the decorator cover plate (not included).

6. Apply power to the circuit.

7. Test according to the TEST OCCUPANCY SENSOR

instructions.

WIRING

WARNING

Disconnect power to the wall

box by turning OFF the circuit

breaker or removing the fuse

for the circuit before installing the FS‑755,

replacing lamps, or doing any electrical work.

Install in compliance with all

applicable codes and standards

1. Make sure that the power has been turned off at the circuit

breaker.

2. Strip insulation off the wires to expose their copper cores

approximately 1/2“

3. Connect wires to the FS‑755 flying leads as shown in the

wiring diagram.

•ConnecttheGROUNDwirefromthecircuittothegreen

wire on the FS‑755.

•ConnecttheNEUTRALwirefromthecircuittothewhite

wire on the FS‑755.

•Connectthepowerwirefromthecircuitbox(HOT/LINE)

to the black wire on the FS‑755.

•Connectthepowerwirefortheloadtotheredwireonthe

FS‑755.

3. Put the FS‑755 in the wall switch box and secure it to the

box with the screws provided.

4. Attach the cover plate.

5. Restore power to the circuit.

Call 866.588.5473 for Technical Support

White

Neutral

Black

Hot/Line

White

Red

(Load)

FS-755

Model:

Passive Infrared

Occupancy Sensor

Line Voltage

120/277VAC, 60Hz

@120VAC 800W max ballast

or tungsten

@277VAC 1200W max ballast

Horsepower: 1/6hp

1xxxxr1

Santa Clara, CA

800.879.8585

=ON =OFF

234

Time Delay

30 second



5 minutes



10 minutes



20 minutes



Sensitivity

Minimum

Maximum





Switch Settings

88T9

Appliance

Control

LISTED

Green

Lighting

load

Black

Switch

(optional)

www.wattstopper.com

ADJUSTMENTS

The Time Delay and PIR Sensitivity

adjustments are located on the back of the

FS‑755 under a removable cover.

The sensors are factory preset for maximum

sensitivity and a 30 second time delay, which

is optimized for use with LED lighting.

For fluorescent loads we recommend at

least 5 minutes for the time delay.

TEST OCCUPANCY SENSOR

Important, there is an initial warm‑up period:

It may take up to a minute for the sensor to warm‑up during the

initial power‑up. During this time, the sensor does not detect

motion.

• If the load is ON when power is applied, it turns OFF within

25 seconds. Approximately 35 seconds after the load turns

off, the sensor starts detecting motion and controlling the

load.

• If the load is OFF when power is applied, the load will stay

off for 60 seconds before the sensor starts detecting and

controlling the load.

1. Set the time delay to minimum (this is the factory preset).

2. Move out of the sensor’s view. Lights should turn off after 30

seconds.

3. Walk down the aisle. When the first sensor detects motion the

green LED in the sensor will flash and the first cooler’s lights

should turn on.

4. Proceed down the aisle, the second cooler’s sensor should

detect you, the green LED in the sensor will flash and the

second cooler’s lights should turn on.

5. This process should continue down the rest of the aisle. As

you walk down the aisle, the cooler lights should progressively

turn on prior to you walking in front of that cooler, turning on

one at a time as you proceed down the aisle.

6. Repeat this process from the opposite end of the aisle. No

matter which direction you approach the system should

function in this way.

TROUBLESHOOTING

The green motion detection LED is located on the front of the

sensor, under the cover plate. Remove the cover plate when

troubleshooting.

Lights will not turn ON:

•SensorLEDdoesnotflashwhenmotioniswithinthecoverage

zone of the detector:

1. Check that the circuit breaker has been turned back on.

2. Check all sensor wire connections.

3. Check for line voltage input to the sensor.

- If line voltage is present, try a different sensor.

- If line voltage is not present, check line wiring.

•SensorLEDdoesflashwhenmotioniswithinthecoverage

zone of the detector:

1. Check all wire connections and verify the load wires are

tightly secured.

2. Check the light switch in the cooler.

3. Check for line voltage on the red load wire.

- If line voltage is present, the sensor is functioning

properly.

- If line voltage is not present, try a different sensor.

* If lights still do not turn ON, call 866‑588‑5473 for technical

support.

Lights will not turn OFF:

The time delay on the sensor can be set from 30 seconds to 20

minutes. Ensure that the time delay is set to the desired delay

and that there is no movement within the sensor’s view for that

time period. To quickly test the unit for proper operation, set

the time delay to 30 seconds and move out of the sensor’s view.

Lights should turn off after 30 seconds.

•IfgreenLEDflasheswhennomotioniswithinthesensor’s

view and the lights do not turn off:

‑ The sensor may be experiencing activations from outside

the controlled area or from some type of interference. Turn

the sensitivity to minimum and allow the sensor to time out.

If the lights turn off, the sensor is working properly.

•IfgreenLEDdoesnotflashwhenmotioniswithinthe

sensor’s view and the lights do not turn off:

1. Check all sensor wire connections.

- If the neutral is not connected the LED will not flash

and the relay will not change state.

2. Check for line voltage input to the sensor.

- If line voltage is present and wiring is correct, try a

different sensor.

- If line voltage is not present, check line wiring.

* If lights still do not turn off, call 866‑588‑5473 for technical

support.

=ON =OFF

234

Time Delay

30 second



5 minutes



10 minutes



20 minutes



Sensitivity

Minimum

Maximum





Switch Settings

Call 866.588.5473 for Technical Support

www.wattstopper.com

2800 De La Cruz Boulevard, Santa Clara, CA 95050

Technical Support: 866.588.5473

www.wattstopper.com

10219r1 9/2009

Please

Recycle

WARRANTY INFORMATION

Watt Stopper/Legrand warranties its products to be free of

defects in materials and workmanship for a period of five

(5) years. There are no obligations or liabilities on the part

of Watt Stopper/Legrand for consequential damages arising

out of, or in connection with, the use or performance of this

product or other indirect damages with respect to loss of

property, revenue or profit, or cost of removal, installation or

reinstallation.

ORDERING INFORMATION

FS‑755 Wide‑Angle PIR Sensor, 120/277VAC, 60Hz

Sensors are White

Legrand FS-755 Wide-Angle PIR Sensor Installation guide

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