mySmart MWS3A-AT-DD User manual

RF ceiling microwave presence detector – DALI / DSI
Overview
The MWS3A-AT-DD is a passive microwave motion sensor
combined with two output channels capable of controlling
incandescent, fluorescent and compact fluorescent lighting.
The MWS3A-AT-AD detects movement using a highly
sensitive microwave detector. This works by emitting low
power microwave signals and measuring the reflections as
the signals bounce off moving objects.
Output Channel 1 comprises a mains voltage relay capable
of simple on/off switching, while Output Channel 2 provides
dimmable control of either DSI or DALI type ballasts.
Functioning as a presence detector, the unit can turn lights
on when a room is occupied and off when the room is
empty. Optional settings allow lights to be turned off in
response to ambient daylight, or to implement a maintained
illuminance (constant light) system. The unit also includes
stored scenes for versatile manual control of lighting levels.
The MWS3A-AT-DD can be used as a standalone unit or
integrated with other devices as part of a system. The
built-in RF transceiver allows wireless communication with
all other An-10®compatible products, e.g. the AT-BB-IN
Input Unit, useful for push-button scene selection and
absence detection.
All functionality is fully programmable.
Features
Front features
Mounting Bezel
Microwave Sensor
Detects movement within the unit’s detection range,
allowing load control in response to changes in occupancy.
IR Receiver
Receives control and programming commands from an
IR (infrared) handset.
Back features
Sensor Lens
which covers...
Microwave Sensor
IR Receiver
Light Level Sensor
Status LEDs
Light Level Sensor
Monitors the ambient light level, allowing load control
based on minimum and maximum Lux Level and also for
providing Maintained Illuminance (constant light) control.
Status LEDs
These flash Red and/or Green to indicate the following:
Walk Test LED active when movement is detected
Valid setting received
Invalid setting received
Software reset received
Factory reset received
Power Input & Switched Output Connector (Channel 1)
Used to connect mains power to the unit and to connect a
switched load.
Dimmable Control Output Connector (Channel 2)
Used to connect DSI/DALI controllable ballasts and
transformers for dimmable loads.
MWS3A-AT-DD
Product Guide

Installation
2
Choosing a Suitable Location
The MWS3A-AT-DD is designed to be ceiling mounted
and must satisfy the following criteria:
• Avoid positioning the unit where direct sunlight may
enter the sensor element.
• Do not site the sensor within 1m of any lighting, forced
air heating or ventilation.
• Do not fix the sensor to an unstable or vibrating
surface.
• Position the sensor so that the occupants of theroom
fall inside the detection zone shown below.
Note that the detection zone illustrated is based on a
recommended mounting height of 2.8m. A lower height
will decrease the overall size of the detection zone.
Detection diagrams
Ideal for large office or classroom Ideal for corridor or aisle applications
Note. If the range is compromised by the ceiling construction /
material. Add the supplied 20mm spacer ring. See page 3 for
fitting details.
Ideal for open plan areas and offices

Installation
3
The MWS3A-AT-DD is designed to be mounted using either:
• Flush fixing, or
• Surface fixing, using the optional Surface Mounting Box (part no. MWS3A-DBB).
Both methods are illustrated below.
Warning - be careful bending springs when mounting unit.
Flush fixing
1
Hole Ø74mm
2
If the range is compromised by the
ceiling construction / material. Add the
supplied 20mm spacer ring.
3
4
Attach cable clamp
5
Surface fixing
1
Hole Ø30mm
MAX
2
3
4
Head locking
Wire stripping details
Important
Ensure that the cables are formed as shown
before affixing the cable clamp. The clamp
MUST clamp the outer sheath(s) only.
Bend cores as shown.
2
• Adjust head to
required position.
• Push clip into position
shown below to lock
head.
• To remove clip, lever
out with a small
screwdriver.
1
Remove metal
locking clip from
rear of unit.

4
Wiring examples
Channel 1 (switched output) of the MWS3A-AT-DD can
either be used to switch a separate channel of standard,
non-dimming luminaires, or to isolate the mains supplyto
dimming ballasts (saving on the standby current of the
ballasts).
Multiple luminaires may be connected in parallel to
Channel 1 (via the N and L/Out terminals) as long as the
maximum total load is not exceeded.
Channel 2 (dimmable output) of the MWS3A-AT-DD can
be used to control the light output of luminaires that are
fitted with dimming ballasts/transformers.
The ballasts/transformers can be connected in parallel to
Channel 2 (via the DIM– and DIM+ terminals). Ensure that
correct polarity is maintained at each ballast. Refer to the
specification on page 16 for ballast quantities.
The wiring examples below show common methods of
connecting the output channels for a single detector unit.
Example 1: Single channel switching
Functionality
• Simple On/Off load control.
• Presence detection.
• Absence detection using an AT-
BB-IN Input Unit and associated
switch/button plate.
• Manual On/Off control using IR
Handset.
• Lux switching.
Example 2: Single channel dimming
Functionality
• Dimmable load control viasuitable
ballast/transformer.
• Mains power to ballast switched
by channel 1.
• Presence or absence detection
(with or without Lux Level control).
• Manual scene/level control using
IR Handset or AT-BB-IN Input Unit
and associated switch/button
plate.
• Optional Maintained Illuminance
Level control.
Example 3: Two channel
Functionality
• Separate control of both a simple
On/Off load and dimmable load
(control via suitable ballast/
transformer with integral mains
switching).
• Presence / absence detection
(with or without Lux Level control).
• Manual scene/level control using
IR Handset or AT-BB-IN Input Unit
and associated switch/button
plate.
• Optional Maintained Illuminance
Level control.
Please note that the dimming signal is
used to switch the dimming luminaire
on/off and therefore the 230V feed to the
luminaire fitting must come from the
permanent live supply

5
Power-up test procedure
When power is applied to the unit, the load will turn on immediately.
Vacate the room or remain very still and wait for the load to switch off (this should take around 10 minutes).
Check that the load switches on when movement is detected.
The unit is now ready for programming.
Fault finding
What if the load does not turn ON?
• Check that the live supply to the circuit is good.
• Check that the load is functioning by bypassing the sensor (e.g. link terminals L and L/ Out on Channel1).
• Check that the unit is correctly addressed, see ‘Step 1: Set channel addresses and channel load type’ on page 7.
• If the detection range is smaller than expected, check the diagram on page 2. Adjusting the angle of the sensorhead
slightly may improve the detection range. If still reduced it may be compromised by the ceiling construction /
material. Add the supplied 20mm spacer ring. See page 3 for fitting details.
HINT: The Walk Test LED function can be used to check that the unit is detecting movement in the required area
(see page 8 for further details).
What if the load does not turn OFF?
• Ensure that the area is left unoccupied for longer than the Time Adjustment Period (default is 10minutes).
• Ensure that the sensor is not adjacent to circulating air, heaters or lamps.
HINT: The Walk Test LED function can be used to check that the unit is detecting movement in the required area
(see page 8 for further details).

Basic programming
6
The functionality of the MWS3A-AT-DD Sensor is
controlled by a number of parameters which can be
changed or programmed by any of the followingdevices:
• UHS4 Infrared Handset
• UNLCDHS Infrared Handset (with LCD)
For most basic programming operations the UHS4 handset
is recommended and the following procedures are based
on using this device.
Point the handset at the Sensor and send the required
programming commands to the unit as shown in Steps 1, 2
and 3.
Valid commands will be indicated by a green LED flash.
See page 1 for details of other LED responses.
Important note
Do not use as hub if the installation uses Area Codes. If Area Codes are used, make a non MWS3A-AT detector
or Slim-line controller a hub in the same local codes as the MWS3A-AT .

Basic programming
7
Step 1: Set channel addresses and channel loadtype
The Sensor has two output channels:
• Channel 1 - Switched Output
• Channel 2 - Dimmable Output
and one input channel:
• Channel 3 - Microwave Sensor
To relate the function of different channels it is necessary
to set the addresses correctly. For example, a scene
select message sent from a device with a Local Code of 1
will only be actioned by devices that also have a Local
Code of 1.
To program the settings for a specific channel on the
Sensor you must specify the appropriate channel number
(i.e.1 to 3) using the programming device.
If no channel number (or channel 0) is specified, all
channels will be set to the same address.
The output channels also have Circuit numbers. This
allows different physical channels to be linked and
controlled as a single Circuit.
Channel 2 (the dimmable output) can control either DSI or
DALI type ballasts. This is called the Load Type and is set
to DSI by default.
Note: for applications where there is only one channel of lighting
being controlled in a room there is no need to select the channel
number.

Basic programming
8
Step 2: Set-up sensor functionality
Detection Mode
The Detection Mode for both output Channels 1 and 2 can
be set to behave in Presence or Absence mode:
• Presence mode allows a channel to turn on when
movement is detected. Once turned on, if no movement
is detected the Time Adjustment (10 minutes by
default) the channel will turn off.
• Absence mode requires the channel to be turned on by
some other means (e.g. by issuing a Scene Select
message via an Input Unit or IR Handset). Once turned
on, if no movement is detected for period of time (the
Time Adjustment) the channel will turn off.
In either case, sensitivity to movement of the Microwave
sensor (Channel 3) can be adjusted using the Sensitivity
parameter (set to 5 by default).
HINT: To assist in setting the Sensitivity, turn on the Walk
Test LED which will flash red when movement is detected.
By default when the detector turns on Local Scene 1 is
selected. When the detector turns off Local Scene 20 is
selected. See ‘Scenes Used for Occupancy Detection’ in
Step 3 for further details.
Switch Level On/Off
Occupancy detection can be made dependant on the
ambient light level using the Lux On Level and Lux Off
Level parameters.
Maintained Illuminance
The detector measures the overall light level in the
detection area and calculates the correct output for the
luminaires, to achieve a preset lux level (maintained
illuminance or daylight harvesting).
By specifying a Maintained Illuminance Light Level the unit
adjusts the output Channel levels to maintain a near
constant light level.
Programming Maintained Illuminance Light Level
• Presence detection Sensing mode (below)
• Absence detection Scene mode (opposite)
Note: for applications where there is only one channel of lighting
being controlled in a room there is no need to select the channel
number.

Basic programming
9
Step 3: Re-program scenes
The MWS3A-AT-DD has capacity to store 20 Local
Scenes and 120 Area Scenes. By default all Scenes are
pre-programmed with the following channel levels, but
these can be changed as required:
NOTE: Local Scene 20 and Area Scene 120 are
designated ‘off’ scenes within a system and should
normally be programmed with all channels off or at zero.
Scenes can be recalled by using an IR Handset or by a
switch/button plate via an AT-BB-IN Input Unit.
Each Scene has a Fade Rate, which is the time taken for
the existing output channel levels to fade to the levels
defined in the selected Scene. By default this is set to 3
seconds for all Scenes.
Each Scene also has a Maintained Illuminance Level
setting. By default this is set to 0 (i.e. disabled) for all
Scenes.
Scenes Used for Occupancy Detection
If movement is detected (in Presence mode), Local On
Scene 1 is selected. By default this switches Channel 1
On and sets Channel 2 to 100% with a 1 second Fade
Rate.
If no movement is detected for the Time Adjustment Period
(in Presence or Absence mode), Local Off Scene 20 is
selected. By default this switches Channel 1 Off and sets
Channel 2 to 0% with a 1 second Fade Rate.
NOTE: These ‘On’ and ‘Off’ Scene selections cannot be
changed using the UHS4 handset. You can, however,
reprogram the levels for Scenes 1 and 20 if required.
Local Scenes
1 2 3 4 5 6 ... 19 20
Ch1 on on on on on on ... on off
Ch2
100%
75% 50% 25% 100% 75% ... 50% 0%
Area Scenes
101 102 103 104 105 106 ... 119 220
Ch1 on on on on on on ... on off
Ch2
100%
75% 50% 25% 100% 75% ... 50% 0%

10
Application examples
Example 1: Offices and corridor
Example 1 shows two small offices, each with four downlighters controlled by a single MWS3A-AT-DD sensor. These
are set-up for Presence detection such that the lights turn on when anyone enters the room and turn off when the room
is vacated.
Similarly, the corridor lights are controlled by two sensors such that if either sensor detects movement, all of the corridor
lights turn on. Note that only one sensor is physically wired to the lighting circuit.
In this arrangement the devices in each room need to be programmed with a unique Local Code, although the two
devices in the corridor share the same code so that they can both control the corridor lights.
In addition, each unit needs its Time Adjustment Period set to an appropriate value.