WATTSTOPPER®
| FM-105
HIGH FREQUENCY OCCUPANCY SENSOR
Models
FM-105
Specifications and Features
120/277VAC, 50/60 Hz
@ 120VAC, 0-800 W ballast or
tungsten
@ 277VAC, 0-1200 W ballast
Power output: 1 mW
Power consumption: 0.5W @ 120VAC
Operating frequency: 5.8 GHz
Integrated photosensor for Hold-OFF
daylighting control (2 to 200 fc)
Adjustable sensitivity range up to 20
feet (6.1m)
Adjustable time delay (10 seconds to
30 minutes)
Includes 2 Directional Shields
Weight: 2.3 oz (65.2 g)
Product Overview
The FM-105 High Frequency
Occupancy Sensor is a line voltage
sensor that turns lighting on and off
based on occupancy, and can hold
lights off when sufficient daylight is
available.
It detects motion via high frequency
electromagnetic waves and the
Doppler principle. Because it can
detect motion through many dense
materials other than metal, the
FM-105 can be installed behind fixture
lenses and hidden from view.
The FM-105 can be used in a watertight non-metallic box or water-tight
luminaire for wet location applications.
Operating conditions: -4° to 131°F
(-20° to 55°C); 5% to 95% RH,
non condensing
Indoor use or outdoor use when
installed in watertight lighting fixtures
UL and cUL listed, FCC approved
Five year warranty
Materials
Polycarbonate, flame retardant
Factory Defaults
Trimpots allow the user to adjust time delay,
sensitivity/range, and the light level setpoint.
Time Delay sets the time interval
lights remain ON after motion ceases
to be detected. A time delay of 30
minutes, the maximum allowable by
ASHRAE 90.1, is recommended for
most applications.
Detection sensitivity can be
adjusted up to 20 feet.
Integrated hold-off daylighting control prevents the
load from turning on if the ambient light level is
brighter than the light level setpoint.
1
WWW.LEGRAND.US/WATTSTOPPER
Time Delay:
Sensitivity:
Light Level:
30 minutes
Maximum
200 footcandles
WATTSTOPPER®
Coverage and Detection Features
MIN.
3’ (1m)
18’ (5.5m)
18’ (5.5m)
12’ (4m)
12’ (4m)
6’ (2m)
FM-105
Installed
inside
inside
ceiling
ceiling amount
mounted
fixture
lighting
fixture
at 8’ (2.5m)
at
a height of 8’
height
MAX.
20’ (6m)
6’ (2m)
Installed
inside a wall
mounted
lighting fixture
at a height of
5’ (1.52m)
(2.44m)
MAX.
MIN.
Figure 1. FM-105 ceiling mount coverage pattern.
Figure 2. FM-105 wall mount side coverage pattern.
The coverage pattern may vary based on sensor location
and the characteristics of surrounding materials. Shield
placement, or the use of the second shield, may also
affect the coverage pattern.
sensor stops the load from turning on if the ambient
light is greater than the daylighting setpoint. If the load
is already on, the sensor will not turn off the load due to
high ambient daylight. The FM-105 light level range is
from 2 to 200 fc.
Light Level Feature
The FM-105 also has daylighting control capability. The
daylight control on the FM-105 is a “Hold-Off” type. The
Dimensions
0.910”
23mm
1.63”
41.4mm
+
1
200
WWW.LEGRAND.US/WATTSTOPPER
Sensitivity
1.65”
41.9mm
FM-105
Microwave (5.8 GHz)
GHz)
Occupancy Sensor
120/277VAC, 50/60
50/60 Hz
Hz
100-277VAC,
@120VAC:0-600W
0-800WBallast,
Ballast
@120VAC:
orTungsten,
Tungsten
0-600W
Light Level
(footcandles) @277VAC: 0-1200W 1/6
Ballast
hp
@277VAC: 0-1000W Ballast,
FCC ID: Q4BFM105
1/4 hp
LINE
-
Time Delay
NEUT
2.01”
51.1mm
30 min
LOAD
3.08”
78.2mm
10
sec
APPLIANCE
CONTROL
FCC ID: Q4BFM105
88T9
2.64”
67.1mm
1.35”
34.3mm
1.65”
41.9mm
2
WATTSTOPPER®
Installing the FM-105 Sensor in Light Fixture
1. Determine the mounting location inside the luminaire or
other suitable enclosure. If the daylight feature will be
used, be sure to locate the sensor where daylight is not
completely obscured from the sensor.
2. Attach the metal shield to the FM-105 so that the shield
is located between the FM-105 and the lamp. Make sure
that the wiring terminals on the FM-105
are accessible.
3. Put the plastic mounting foot onto the base of the
FM‑105 to secure the metal shield in place.
4. Secure the FM-105 assembly in place using screws
through the plastic mounting foot.
Figure 3. The FM-105
installs into the fixture
and is invisible from view.
Sensitivity
FM-105
Microwave (5.8 GHz)
Occupancy Sensor
100-277VAC, 50/60 Hz
120/277VAC,
@120VAC:
@120VAC:0-600W
0-800WBallast,
Ballast
0-600W
orTungsten,
Tungsten
Light Level
1/6 hp
200 (footcandles)@277VAC: 0-1200W Ballast
@277VAC: 0-1000W Ballast,
FCC ID: Q4BFM105
1/4 hp
LOAD
1
+
LINE
-
Time Delay
30 min
NEUT
10
sec
Figure 4. Position the metal
shield between the sensor
and the lamp.
APPLIANCE
CONTROL
FCC ID: Q4BFM105
88T9
OR
3
WWW.LEGRAND.US/WATTSTOPPER
Light Level
1/6 hp
200 (footcandles)@277VAC: 0-1200W Ballast
@277VAC: 0-1000W Ballast,
FCC ID: Q4BFM105
1/4 hp
APPLIANCE
CONTROL
FCC ID: Q4BFM105
88T9
10
sec
1
Time Delay
30 min
+
Sensitivity
FM-105
Microwave (5.8 GHz)
GHz)
Occupancy Sensor
120/277VAC, 50/60
50/60 Hz
Hz
100-277VAC,
@120VAC:0-600W
0-800WBallast,
Ballast
@120VAC:
orTungsten,
Tungsten
0-600W
Light Level
200 (footcandles)@277VAC: 0-1200W Ballast
1/6 hp
@277VAC: 0-1000W Ballast,
FCC ID: Q4BFM105
1/4 hp
APPLIANCE
CONTROL
FCC ID: Q4BFM105
88T9
10
sec
1
Time Delay
30 min
+
Sensitivity
FM-105
Microwave (5.8 GHz)
Occupancy Sensor
100-277VAC, 50/60 Hz
120/277VAC,
@120VAC:
@120VAC: 0-600W
0-800WBallast,
Ballast
0-600W
orTungsten,
Tungsten
Light Level
200 (footcandles)@277VAC: 0-1200W Ballast
1/6 hp
@277VAC: 0-1000W Ballast,
FCC ID: Q4BFM105
1/4 hp
LINE
FM-105
Microwave (5.8
(5.8 GHz)
GHz)
Microwave
Occupancy Sensor
Sensor
Occupancy
100-277VAC, 50/60
50/60 Hz
Hz
120/277VAC,
@120VAC: 0-600W
0-800W Ballast,
Ballast
0-600W
or Tungsten,
Tungsten
NEUT
Sensitivity
LOAD
+
LINE
1
Time Delay
30 min
NEUT
-
LOAD
APPLIANCE
CONTROL
FCC ID: Q4BFM105
88T9
10
sec
LINE
FM-105
Microwave (5.8 GHz)
Occupancy Sensor
120/277VAC, 50/60 Hz
100-277VAC,
@120VAC:0-600W
0-800WBallast,
Ballast
@120VAC:
orTungsten,
Tungsten
0-600W
Light Level
200 (footcandles)@277VAC: 0-1200W Ballast
1/6 hp
@277VAC: 0-1000W Ballast,
FCC ID: Q4BFM105
1/4 hp
NEUT
Sensitivity
LOAD
+
LOAD
1
Time Delay
30 min
LINE
-
NEUT
10
sec
Figure 5. Bottom of FM-105: Align
studs on the bottom of the FM-105
with the holes on the metal shield
flanges. Do not block wiring terminals
on the FM-105 with the shield.
APPLIANCE
CONTROL
FCC ID: Q4BFM105
88T9
Figure 6. The plastic mounting
foot can be oriented as needed,
and accommodates an optional
second shield in two positions.
WATTSTOPPER®
Wiring Diagrams
Plastic mounting foot
10
sec
1
Time Delay
30 min
+
Sensitivity
FM-105
Microwave (5.8 GHz)
Occupancy Sensor
Figure 6. FM-105 wiring diagram.
120/277VAC, 50/60 Hz
@120VAC: 0-800W Ballast
or Tungsten
Light Level
200 (footcandles)@277VAC: 0-1200W Ballast
LINE
Metal
shield
NEUT
LOAD
FCC ID: Q4BFM105
Lighting
Load
APPLIANCE
CONTROL
88T9
Hot/Line
Neutral
Sequence of Operation
It may take up to a minute for the sensor to warm up during the initial power-up. The sensor has an “instant on”
feature. This occurs during installation or after a lengthy power failure only. As soon as power is supplied to the
FM-105, the lights will come on and stay on for approximately 1 minute. If no movement is detected within that time the
lights will turn off until detection occurs. If movement is detected during the initial 1 minute then the lights will stay on
for whatever time has been set on the time delay.
Ordering Information
Master Pack Details
Inner Pack Details
Catalog #
Master
Pack
Quantity
Length
Width
FM-105
128
13.38
13.38
Catalog #
FM-105
Height
Weight
(pounds)
Inner
Pack
Quantity
Length
Width
Height
Weight
(pounds)
17.72
23.48
64
12.63
12.75
8.23
10.07
Case dimensions (inches)
Case dimensions (inches)
Color
Description
Input Voltage
White
Fixture mount, high frequency occupancy sensor with adjustable time delay and
light level
120/277VAC, 50/60 Hz
The FM-105 may cause interference to a Wireless Network operating at a similar frequency around 5.8 GHz.
Information supplied above is subject to change.
Harmonization code: 8538908080. Country of origin: China
WWW.LEGRAND.US/WATTSTOPPER
Pub. No. OEM-209 01/2017
4