Product Guide
MWS3A-AD
Analogue Dimming Microwave Presence/Absence Detector
Contents
Section Contents Page
1 Dimensional information 1
2 Description and operation 2
3 Wiring & Fixing 3
4 Installation 3
5 Fixing - Flush 4
6 Fixing - Surface 4
7 Head locking 5
8 Time, Lux & Sensitivity adjusters 5
9 Programming 6
10
Wiring diagrams
11
Detection pattern diagrams
12
Fault finding
13
Specification
14
Part numbers
1. Dimensions
8
10
11
12
12
page
2. Description and Operation
The MWS3A-AD microwave presence detector provides automatic control of lighting loads with optional
manual control. It can be used on fluorescent and compact fluorescent lighting with 1-10V analogue
dimming ballasts. The MWS3A-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. The MWS3A-AD has a unique adjustable sensor head that allows the area of detection to
be optimised for the application.
The detector can be used to control the light output of luminaires that are fitted with dimming ballasts. 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).
Two input terminals can be used to manually override the dimming levels and override the lights on or off.
An integral infra-red sensor in the unit allows the unit to be programmed using the optional DD-LCDHS
programming handset. This gives complete flexibility over many of the operating parameters. Without the
handset, manual adjustments can be made to the sensitivity, lux and time settings using controls
accessible behind the lens.
The UHS user handset can be used to change output lux levels and override the lights on or off.
Two standard units are available:
MWS3A-AD - presence detection:
When movement is detected the load will automatically turn on. When the area is no longer occupied the
load will automatically switch off after an adjustable time period.
MWS3A-AD /ABS - absence detection:
The load is manually switched on. When the area is no longer occupied the load will automatically switch
off after the adjustable time period has elapsed. Note that the MWS3A-AD can be programmed to
absence detection using the programming handset.
In most applications the MWS3A-AD can be used with simple manual adjustment. However, the MWS3AAD unit has a comprehensive set of features that can be set using the DD-LCDHS handset. Alternatively
the units can be commissioned as follows:
On-site commissioning service - please contact our sales department for details.
Pre-commissioning service - the units will be despatched to site with the correct features set. The
part number will read MWS3A-AD /PRG followed by the project reference number. Please contact
our sales department for details.
page 2
3. Wiring & Fixing
Wire the products using the diagrams shown in section 10.
To switch from more than one position simply wire two or more units in parallel using the Live,
Neutral, Switched Live and manual switch wires only. The dimming connection must be wired to
one unit only.
The detector should be sited so that the occupants of the room fall inside the detection pattern
shown in section 11.
Corridors or aisles: the unit should be placed at the end of the corridor or aisle and the sensor
head should be angled to look down the corridor or aisle.
Open plan areas and offices: the unit can be mounted in a corner looking outwards in which
case the sensor head should be angled, or the unit can be mounted in the centre of the area
with the sensor head flat.
Note that the higher the sensor is installed the shorter the detection range will be.
Sites as far away as possible from any lighting or ventilation equipment.
Do not fix to a vibrating surface.
Do not fix to a suspended luminaire.
Site as far away as possible from the surface of metal objects.
Mount using one of the two options overleaf.
4 Installation
1. Make sure the load is connected and in working order.
2. Isolate the mains supply to the circuit at the main consumer unit.
3. Connect the sensor via the terminal blocks according to the applicable wiring diagrams shown in
section 10.
4. Use a small screwdriver to set the LUX level adjuster fully clockwise, the time to minimum (fully
anticlockwise) and the sensitivity to maximum (fully clockwise) using the diagram in section 8.
5. Apply power—the load should come on immediately.
6. Vacate the room or remain very still and wait for the load to switch off (should take no more than 2
minutes).
Check that the load switches on when movement is detected.
7. For dimming applications, set the light output level by using the LUX adjustment thumbwheel or
the handset. See section 9 for handset operation.
During operation the output level varies very gradually. However when the LUX level is
changed the unit automatically enters setup mode: in this mode the output level varies
rapidly. After the setup time the unit reverts to normal.
When adjusting the output, allow the output level to settle by changing very gradually.
To disable the maintained illuminance function completely, set the LUX level to maximum
9. Select the time out range using the adjuster, fully clockwise is the maximum.
10. The area of detection can be varied by altering the angle of the sensor head and the sensitivity
adjuster. Note: on maximum sensitivity this unit is extremely sensitive to movement and may
detect through glass, thin walls or partitions. If this causes a problem reduce the sensitivity by
turning the adjuster anticlockwise.
11. Using the UHS or UHS3 infra-red handset: the override on button turns the unit on permanently;
the override off button turns the unit off permanently; the cancel button cancels the overrides.
When an override is selected an LED will flash inside the unit. The UHS handset can also be used
to set the lux levels—see Section 9.5
Note: the above adjustments can also be made using the DD-LCDHS handset instead of the
manual
page 3
5. Fixing - Flush
Warning - be careful bending springs when mounting unit.
1 4 3 2
Hole Ø74mm
Attach cable clamp.
6. Fixing - Surface
Warning - be careful bending springs when mounting unit.
1 3 2
Hole Ø30mm MAX
50mm or 60mm
fixing centres
4
page 4
7. Head Locking
1
Remove metal locking clip from
rear of unit.
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 2
Slide open window.
8. Time, Lux & Sensitivity Adjusters
Sensitivity
Lux
Time
page 5
9. Programming
All the following functions can be programmed using the remote control DD-LCDHS handset:
1. Detector Parameters (factory default in brackets):
1.1 Time adjustment 10 seconds to 99 minutes time delay (select 0 for 10 second
delay – use for commissioning only).
1.2 Sensitivity On (9) Sensitivity level when the detector is already operational
adjustable between 1 (min.) and 9 (max.)
1.3 Sensitivity Off (9) Sensitivity level for switching the detector on – adjustable
1.4 Power Up On (Y) Select No for a 30 second delay on start up. If Yes is selected,
1.5 Walk Test (N) An LED behind the detector lens will flash to show movement
1.6 Disable Detector (N) Disables detection, leaving the relay output permanently off
1.7 Factory Default Restores factory default settings.
2. Modes (factory default in brackets):
2.1 Channel Modes
2.1.1 Switch only Usually used for absence detection - in this mode the dimming
2.1.2 Switch and dim together (default) The detector will switch and dim the lighting together.
2.1.3 Switch and dim separate Not used.
2.2 Switch Modes
2.2.2 2 position switch separate A single centre biased retractive switch will be used to
2.2.3 1 position switch together A single centre biased retractive switch will be used to
2.2.4 1 position switch separate Not used.
3. Switching Channel 1 functions (factory default in brackets):
3.1 Presence detection Auto switch on with detection, auto off after movement ceases
3.2 Absence detection Manual switch on, auto off after movement ceases and time
3.3 Switch level on (9) Lux level setting to prevent the luminaires being switched on if
and 9). The luminaires will always be switched on at level 9.
3.4 Switch level off (9) Lux level setting to switch the luminaires off during occupancy
For a higher resolution of ‗switch level off‘ a scale of 101-199
between 1 (min.) and 9 (max.).
there will be no delay on start up and the detector will always
power up detecting.
has been detected (use for commissioning).
with the dimming output operational. This mode is used when
the unit is for maintained illuminance only.
channel is not used.
control dimming and switching.
control dimming and switching.
(MWS3A-AD default) and time delay ends.
(MWS3A-AD/ABS default) delay ends.
the ambient light level is sufficient (adjustable between 1
For a higher resolution of ‗switch level on‘ a scale of 101-199
is available in the ‗Special menu‘.
if the ambient light level goes above the setting (adjustable
between 1 and 9). Level 9 will always keep the lights on. This
setting can be used for ―window row switching‖.
is available in the ‗Special menu‘.
page 6
4 Dimming Channel 2 functions (factory default in brackets):
4.1 Light level Maintained illuminance level (adjustable between 1 and 999). At 999 the
4.2 Presence detection Not used. See Channel 1 setting.
4.3 Absence detection Not used. See Channel 1 setting.
4.4 Switch level on (9) Not used. See Channel 1 setting.
4.5 Switch level off (9) Not used. See Channel 1 setting.
4.6 Memorise (N) If this is set to Yes, the last manual lux level set will be memorised and
4.7 On value (99) Dimming output level when switched on (0-99).
4.8 Off value (0) Dimming output level when switched off (0-99). If a non-zero off value is
4.9 Fade value (10) After occupancy ceases, this dimming output level is loaded for the fade
4.10 Fade mins (0) This is the time period (adjustable between 0 and 99 minutes) that the
4.11 Max value (99) Maximum dimming output level (adjustable between 0 and 99).
4.12 Min value (1) Minimum dimming output level (adjustable between 0 and 99).
4.13 Speed on (40) Determines the dimming response speed after the setup time has
4.14 Speed set (5) Determines the dimming response speed during the set up time.
4.15 Set seconds (120) Determines how long the dimming response set-up period lasts on power-
4.16 Burn-in (0) Determines how long the output will be at 100% so that lamps ‗burn-
output will be always be at maximum.
used as the new switch on level.
set, then the output will toggle between this value and completely off
depending on the switch level on and off values. For example, if it is light
outside, the fittings will be off if there is no occupancy. If it is dark outside,
they will adopt the preset off value. This feature is only enabled if ‗Min
value‘ is set to 99.
time (adjustable between 0 and 99).
luminaire will be held at the fade value before turning off. A value of 0
disables the fade function.
finished. Measured in 0.1 sec intervals.
Measured in 0.1 sec intervals. If set to 0 will disable dimming for ―Set
seconds‖ below, used if fittings are required to warm up before dimming.
up or on setting change (adjustable between 1 and 999 seconds). This
enables the desired lux level to be achieved rapidly when the lights come
on, or during setup.
in‘ (adjustable between 1 and 999 hours). The ‘burn-in‘ time is not affected
by power supply interruptions. To disable burn-in set to 0.
5 User Menu
DD-LCDHS user menu or UHS handset functions:
5.1 Lux up Increase light level. Reverts when occupancy cycle complete.
5.2 Lux down Decrease light level. Reverts when occupancy cycle complete.
5.3 Scene up Steps up between 6 pre-defined scenes.
5.4 Scene down Steps down between 6 pre-defined scenes.
5.5 Scene# Select the individual scene, between 0 and 6. (1 = min. output; 2 = 10%;
3 = 25%; 4 = 50%; 5 = 75%; 6 = 100%)
5.6 Override on Permanently overrides the luminaire output on.
5.7 Override off Permanently overrides the luminaire output off.
5.8 Cancel Cancels the on or off override, returning the detector to normal operation.
5.9 Set If sent before using lux up or lux down, it will set the light level as in 4.1
page 7
L/OUT
L
N
SW1/UP
+
-
SW2
DOWN
DIMMING
BALLAST
DIMMING LUMINAIRE
(1-10V)
CIRCUIT PROTECTION
(IF REQUIRED)
LIVE
NEUTRAL
CENTRE BIASED
RETRACTIVE SWITCH
(240V SWITCHING)
Optional for presence,
mandatory for absence detection
10. Wiring Diagrams
10.1 Single channel dimming
Functions: Switches the luminaire with occupancy and maintains illuminance. Dims and switches using
optional centre biased retractive switch (MK K4900 or similar).
Configured to presence detection: Turns on automatically with occupancy. Maintains illuminance.
Press and release down switch to turn off. Press and release up switch to turn back on. Press and hold up
switch to dim up, press and hold down switch to dim down. Turns off after occupancy.
Configured to absence detection: Press and release up switch to turn on. Maintains illuminance. Press
and release down switch to turn off. Press and hold up switch to dim up, press and hold down switch to
dim down. Turns off after occupancy.
Channel mode: Set to ―Switch and dim together‖.
Switch mode: Set to ―2 position switch together‖. Note: a single position switch can be used instead to
toggle the output, set to ―1 position switch separate‖.
page 8
L/OUT
L
N
SW1/UP
+
-
SW2
DOWN
DIMMING
BALLAST
DIMMING LUMINAIRE
(1-10V)
CIRCUIT PROTECTION
(IF REQUIRED)
LIVE
NEUTRAL
CENTRE BIASED
RETRACTIVE SWITCH
(240V SWITCHING)
Optional for presence,
mandatory for absence detection
L/OUT
L
N
SW1/UP
SW2
DOWN
CIRCUIT PROTECTION
(IF REQUIRED)
LIVE
NEUTRAL
CENTRE BIASED
RETRACTIVE SWITCH
(240V SWITCHING)
Optional for presence,
mandatory for absence detection
LUMINAIRE
(NON-DIMMING)
+
-
10.2 Single channel switching
Functions: Switches channel 1 only with occupancy, optional override switch. No dimming output.
Configured to presence detection: Turns on automatically with occupancy. Press and release down
switch to turn off. Press and release up switch to turn back on. Turns off after occupancy.
Configured to absence detection: Press and release up switch to turn on. Press and release down
switch to turn off. Turns off after occupancy.
Channel mode: Set to ―Switch only‖
Switch mode: Set to ―2 position switch together‖. Note: a single position switch can be used instead to
toggle the output, set to ―1 position switch separate‖.
page 9
11. Detection Patterns
Ideal for large office or classroom
Ideal for corridor or aisle applications
Ideal for open plan areas and offices
page 10
12. Fault Finding
LOAD DOES NOT COME ON
Check to see if the live supply to the circuit is good. Strap across the L and LIVE OUT terminal to turn
the load on.
If the supply and wiring are good, check the LUX level setting. Increase the LUX level setting to allow
the controller to turn on at higher ambient natural light level.
LOAD DOES NOT GO OFF
Ensure that the area is left unoccupied for a greater time period than the time out period set using the
switch.
Make sure that the sensor is not adjacent to vibrating surfaces or objects (e.g. ventilation equipment).
The unit may pick up movement through thin partitions or walls. Reduce the sensitivity by turning the
adjuster anticlockwise.
page 11
13. Specification
LOAD
Channel 1 (switching):
10A of lighting and or ventilation including incandescent, fluorescent, compact fluorescent, low voltage
(switch primary of transformer).
Channel 2 (dimming):
Maximum number of 1-10V analogue ballasts is 10.
SUPPLY VOLTAGE 220-240 Volts AC 50 Hz
TIME OUT PERIOD Adjustable 10 seconds to 99 minutes
LIGHT LEVEL Light to dark
TERMINAL CAPACITY 2.5mm2
MATERIAL Flame retardant ABS
TYPE Class 2
TEMPERATURE -10°C to 35°C
SAFETY The microwave radiation emitted by these units is exteremely low power.
At a distance of > 50mm the power density is <6% of the ANSI IEEE C95.1 –1991
recommended microwave power density.
At a distance of 5mm from the unit it is <84% of recommended power density.
CONFORMITY EMC-89/336/EEC
LVD-73/23/EEC
14. Part Numbers
MWS3A-AD Analogue dimming microwave presence detector
MWS3A-AD /ABS Analogue dimming microwave absence detector
MWS3A-AD /PRG Analogue dimming microwave detector pre-commissioned (contact sales depart-
MWS3A-DBB Surface mounting box
DD-LCDHS IR remote control programming handset with LCD screen
UHS IR remote control user handset with lux setting functionality
UHS3 IR remote control user handset with on/off override only
ment)
IMPORTANT NOTICE!
This device should be installed by a qualified electrician in
accordance with the latest edition of the IEE wiring regulations.
FM 45789 EMS 534520
Due to our policy of continual product improvement CP Electronics reserves the right
to alter the specification of this product without prior notice.
page 12
C.P. Electronics Ltd
Brent Crescent
London
NW10 7XR
United Kingdom
Tel: + 44 (0) 333 900 0671
Fax: + 44 (0) 333 900 0674
www.cpelectronics.co.uk
enquiry@cpelectronics.co.uk
Ref #WD314 Issue 2
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