Page 1
Light Level Sensor – Ceiling Mounted
© 2015 EnOcean GmbH V1.0 Page 1
Package Contents
Tools Required
Light Level Sensor
2 screws, 2 wall
anchors
Wire bracket
Power drill, 3/16” bit
Screwdriver
Light meter
Product Description
The ceiling-mounted Light Level Sensor is wireless, powered
by natural light, and uses the solar cell to measure outside
illumination to control open loop dimming systems.
Every minute the light level sensor measures the current
light level via the solar cell.
If the change since last transmission is >50 lux it will
immediately transmit an RF signal including the current
measurement value. Otherwise there will be a heartbeat
transmission after 20-30min.
In addition the device provides a light test mode which can
be used to find a suitable position for installation.
Product Features:
Interoperable
Communicates wirelessly with other devices using the
EnOcean wireless standard
Harvests ambient solar energy to power the sensor and
wireless communication
Measures light level via the solar cell
Mounts easily on any ceiling material
Enables daylight harvesting in individual fixtures or zones
controlled by LEDR and LEDD or other open loop
dimming systems
Specifications (typ. values)
Power Supply Solar energy harvesting
Measurement Range
Resolution
Typical Accuracy
0 – 1020 lux
4 lux
+- 5% @ full scale, 68°F
Measurement interval 1 minute
Transmission interval After measurement if change > 50 lux
since last transmission
Heartbeat every 20 ... 30 minutes
(affected at random)
Startup charge time to
first transmission*
5 minutes @ 200 lux for operation
from empty energy store
Sustaining charge* 3 hours per day @ 200 lux
Time to full charge* 30 hours @200 lux
Operation time in total
darkness
80 hours
(after full charge)
Configuration Interface 2 Buttons, 2 LED for device
configuration & manual control
RF Standard EnOcean 902 MHz
Transmission Range 80 ft. (25 m)
EnOcean Equipment
Profile
A5-06-02
Dimensions 6.30” L x 2.36” W x 1.15” D
(160 mm x 60 mm x 37 mm)
Weight 4.4oz. (125g)
Mounting Position At the ceiling, close to the ambient
light source (window)
Environment
Indoor use only
32° to 140° F (0° to 60° C)
20% to 85% relative
humidity (non-condensing)
Agency Compliance FCC, IC, RoHS
* Natural bright light (2000 lux) can be temporarily used to significantly
shorten startup charge times.
Specified lux values are for typical fluorescent lighting. Lux level
requirements for LED and other types may vary.
For lux reference, OSHA standards require a minimum of 323 lux for
office areas.
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Light Level Sensor
©
2015
1.
Planning
Take a moment to plan for the sensor’s successful operation
and optimal communication with other system components.
Remove the sensor from its packaging and place it unde
bright light to provide the required startup charge.
Choose a proper installation location taking the following
points into account:
T
window, or directly at the upper end of the interior
window
T
the
The
points towards the window
amount of incoming daylight
Use light test mode to see if the sensor
measured
should not change if artificial lights are switched on and
off.
In addition, during dusk or dawn use
intended location and
changes of the reported illumination should be see
Consider the construction materials (such as metal) in the
space and obstacles that may interfere with RF signals
2.
Installing
The light level sensor can be mounted on
the provided screws, or mounted on dropped ceilings, using
the provided wire bracket.
NOTE:
mounted
1.
Decide where you want to install the light level
The solar cell must point towards the window in order to
measure outside illumination
2.
Remove the mounting plate from the sensor.
3.
Determine which of the two installation methods is most
appropriate:
A.
ii.
EnOcean GmbH
he sensor
should be located
sidewall
he chosen
location
sensor
solar cell
sensor
should be mounted such that the solar cell
daylight
It is often easier to link the se
. Refer to the “Linking” section.
Screw Mounting Plate to the
i. Hold
the mounti
lightly mark two small
dots for the screw drill
points.
Drill two holes with a
3/16” drill bit and insert
the wall anchors.
V1.0
should
should not measure
only
. Light test mode blink rate
switch light on and off. Only small
ng plate in place
–
Ceiling
at the ceiling, close to a
provide natural light only
so that it
measure
light only.
a
light meter at the
most
nsor before it is
Mounting Surface
and use a pencil to
artificial
light
s the
properly
n
surfaces
sensor.
Mounted
r a
;
.
with
iii.
iv.
B.
ii.
iii.
iv.
v.
vi.
vii.
viii.
4.
Attach the sensor to the
mounting plate.
With the 2
facing you, slide the sensor
to the left on the mounting
plate until it snaps into
place.
5.
Confirm the sensor is properly positioned to measure
outside illumination and has sufficient light to operate.
3.
Linking
Linking is the process by which different
configured to work with each other in a system. Sometimes
this process is also called Teach
Specifically for the Light Level Sensor, linking is the process
by which
of
rece
Controller
Insert the first screw loosely and level the
mounting plate.
Insert the second s
the first screw.
Mount Using the Wire Bracket
i.
Remove the ceiling tile where you want to
mount the sensor.
Place the mounting plate squarely on the ceiling tile
and use the wire to mark two points for the holes.
Punch two smal
the marked points.
Insert the wire bracket through the
two holes in the mounting plate.
Make sure the ends are
Feed the wires through the
holes in the ceiling tile.
On the front of the ceiling tile,
flatten the wire bracket so it is
s
nug against the mounting plate.
On the back of the ceiling tile, twist
the wires together to hold the
mounting plate securely.
Replace the ceiling tile.
-
button inter
it identifies itself to
iving
processing its sensor data
, a C
entral
crew and then hand
l holes
face
an
Controller or a Gateway
Page
through the ceiling tile at
r
oughly even.
devices are
-
in or Learn
other device that is capable
(
e.g. an
2
-tighten
-in.
LED
).
Page 3
Light Level Sensor
©
2015
Note that the Light Level Sensor cannot be linked to
such as
input data.
Linking
To link the Light Level Sensor with a
device
Level Sensor
specific
Once these conditions are met, the Light Level Sensor is
triggered to send a link
The
identifies the sensor
information presented
The other device
so that
telegrams originating from the Light Level Sensor.
This relationship between the Light Level Sensor and the
device it is
Light Level Sensor
Link / unlink procedure
1.
Set the
Link
guide).
2.
Shortly c
on the
once.
This sends a link/unlink radio
telegram.
3.
The external device
receive
the Light Level Sensor accordingly
NOTE: The button interface on the sensor is used for linking
and testing only.
Ref
er to the “Linking” section of the transceiver
controller installation guides to complete the linking &
setup process.
EnOcean GmbH
sensors or switches
or
unlinking the
must be powered, within wireless range of the
and set to linking
link
messages
other device
it can automatically
linked to can be terminated by unlinki
external device
or
Unlink mode
lick the
side
of the sensor
this link/unlink radio telegram
V1.0
that
.
radio telegram
receives this link
ID and sensor
therein
then stores these
accept and
from the other device
(
e.g.
(refer to that device’s installation
Link
button
will
–
Ceiling
cannot receive
Light Level Sensor
suitable
or unlinking
.
radio telegram
type based on the
.
parameters permanently
process future
.
controller or gateway)
and
.
devices
or
process its
device, th
is
Light
mode to
receive
and
ng the
to
link or unlink
/
Mounted
Light Test
Before starting light test, ensure the sensor’s energy storage
is fully charged by placing it under bright light (2000 lux
1.5 hours.
Use the light test to measure real
confirm whether the light level sensor has sufficient
light
light level is within its measurement range.
1.
Hold up or
mounting position
2.
Press and hold the
••> Red & green LEDs will blink to confirm light test is
active.
3.
Watch the LED blink rate to determine the light strength.
0 blink: <50 lux
1 blinks
2 blinks: 251
3 blinks: 501
4 blinks: 751
5 blinks: >1000 lux
4.
This test mode will
at any time
4.
Troubleshooting
Problem
Sensor
a wireless message
Linked device does not
respond to wireless
messages
This
device complies with part 15 of the FCC rules and Industry Canada ICES
Operation is subject to the following two conditions: (1) This device may not cause harmful
interference, and (2) this device must accept any interference received, including int
that may cause undesired operation.
IMPORTANT! Any changes or modifications not expressly approved by the party responsible for
compliance could void the user’s authority to operate this equipment.
, is not influenced by artificial lighting
temporary mount the sensor to the intended
: 50-
250 lux
-
500 lux
-
750 lux
-
1000 lux
by pressing the
does not generate
Contains:
.
Test
button for 5 seconds.
be
active for 3 minutes.
Solution Checklist
Press
message
Verify the solar cell is charged
properly
Check position using light test
Force radio message by pressing
button
Check for environment or range issues
Verify the device is linked
Check the transceiver connection and
the wiring for errors
Check if appropriate devices are
linked according to good system
planning
: FCC: SZV-
STM300U
IC: 5713A-
STM300U
Page
-
time light levels and
and whether the
Link
button.
Test
button to transmit radio
3
natural
It can be e
Test
-003.
erference
) for
xit
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