C.P. Electronics MWS1A-PRM User manual

Overview
The MWS1A series of microwave presence detector
switches are designed to provide automatic control of
lighting, heating or ventilation loads. The MWS1A detects
movement using a highly sensitive microwave detector.
This works by emitting low power microwave signals and
measuring the reflections as the signals bounce of moving
objects. The MWS1A is optimised for wall mounting
applications to give detection over long distances.
When movement is detected the load is turned on. When
an area is no longer occupied the load will switch off after
an adjustable time out period.
The internal light sensor provides additional energy saving
in lighting applications. When an area is occupied lighting is
only switched on when the level of natural light is below a
preset level.
Three variants are available
MWS1A-PRM Mains voltage, switched live contact
MWS1A-PRM-VFC Mains voltage, isolated changeover
contact
MWS1A-PRM-LV Low voltage, isolated changeover
contact
Features
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.
Light Level Sensor
An integral adjustable photocell allows the lights to be kept
off if there is sufficient ambient light.
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.
Status LED
The LED flashes Red to indicate the following:
Fig 1: Front features
Walk Test LED active when movement is detected
Valid setting received
Microwave Presence Detector - wall mounted
MWS1A-PRM
Product Guide
Sensor Lens
which covers...
IR Receiver
Light Level Sensor
Status LED
Mounting screw covers

2
Installation
BS4662 square
back box
DIN standard round
back box
To switch from more than one position simply wire two or more units in parallel to achieve two way and intermediate
switching.
The detector should be sited so that the occupants of the room fall inside the detection pattern shown overleaf, at a
recommended height of 1.2m to 1.5m for wall sensors. Note that the higher the sensor is installed the shorter the
detection range will be.
 Do not site within 1m of any lighting or ventilation equipment.
 Do not fix to a vibrating surface.
 Site as far away as possible from the surface of metal objects.
Back box Compatibility Mounting
The MWS1A is designed to fit both UK and EU style
backboxes.
Wiring
25mm
Do not over tighten
Mounting screw cover
MWS1A-PRM MWS1A-PRM-VFCMWS1A-PRM-LV
N
N
L/OUT
L
Neutral
Circuit protection
(if required)
Load
Neutral Live out
Live
-
+
NC
-
NC NO
COM
NO
+
Neutral
Circuit protection
(if required)
NC NO
Live
Fault finding
What if the load does not turn ON?
 Check to see if the live supply to the circuit is good. For the MWS1A-PRM version only: 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.
What if the load does not turn 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.
N
L
NC
COM
NO

3
Programming
Parameter
Name
Default
Value
0123UHS5 Handset Graphics Description
Button Activation
On / Raise On Turn lights on.
Off / Lower Off Turn lights off.
Walk test Off On Off When set to On this causes a red LED to
flash on the sensor when it detects
movement. Use this feature to check for
adequate sensitivity levels.
Time Out
(Time
adjustment)
10 mins 1, 10 &
20
minutes
5, 15 &
30
minutes
Once the detector is turned on, this value
sets how long the lights will stay on once
movement has ceased.
Lux on level
(Switch
level on)
9 2, 5 & 7 4, 6 & 9 Lux level setting to prevent the luminaires
being switched on if the ambient light level
is sufficient (adjustable between 1
and 9). The luminaires will always be
switched on at level 9.
Lux off level
(Switch
level off)
9 2, 5 & 7 4, 6 & 9 Lux level setting to switch the luminaires off
during occupancy 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”.
Sensitivity 9 1, 5 & 9 3, 6 & 8 Sensitivity level for detecting movement.
1 = low sensitivity
9 = high sensitivity
Defaults D Returns the unit to the default settings.
Presence /
Absence
Presence Presence Absence Absence mode not implemented—do not
use.
Shift Use this button to select the settings in red
and blue signified by the ‘Shift 1’ and ‘Shift
2’ LEDs
Number of Shift key presses
The functionality of the MWS1A is controlled by a number of parameters which can be
changed or programmed by any of the following devices:
 UHS5 Infrared Handset. See below for programmable functions.
 UN-LCDHS Infrared Handset (with LCD). See user guide for full programming details.
For most basic programming operations the UHS5 handset can be used 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 below.
Valid commands will be indicated by a red LED flash. See page 1 for details of other LED
responses.
Note: other functions on the UHS5 which are not shown below are not applicable to this
product.
SHIFT 1 SHIFT 2 SHIFT 1 SHIFT 2SHIFT 1 SHIFT 2SHIFT 1 SHIFT 2

4
The allowable frequency of operation of this product is different depending on region. Please select the correct order
code using the table below.
Part numbers
MWS1A-PRM Microwave presence detector (wall mounting)
MWS1A-PRM-LV Microwave presence detector (wall mounting) Low Voltage
MWS1A-PRM-VFC Microwave presence detector (wall mounting) Volt Free Contact
MWS1A-PRM
Supply Voltage 230VAC +/- 10%
Frequency 50Hz
Power consumption On 1.15W
Off 790mW
Load 10A of lighting and or ventilation including
incandescent, fluorescent, compact
fluorescent, low voltage (switch primary of
transformer).
MWS1A-PRM-LV
Supply Voltage Min 11.5VDC max 36VDC, min 10VAC
max 26.5VAC
Power consumption On 1.01W
Off 712mW
Load Low voltage supply with relay output rating
16A resistive 10A inductive
MWS1A-PRM-VFC
Supply Voltage 230VAC +/- 10%
Frequency 50Hz
Power consumption On 1.15W
Off 790mW
Load Normally closed contact
2 Amp maximum
Minimum load 100mA
Normally open contact
6 Amp fluorescent lighting and resistive
3 Amp compact fluorescent lighting
3 Amp low energy lighting
3 Amp low voltage lighting (switch primary
of transformer)
Fluorescent lighting (max 6 fittings
recommended)
For fluorescent lighting total power factor
correction capacitance must not exceed
40μF.
3 Amp fans and ventilation equipment
Switch SON lighting loads via a contactor
Minimum load 100mA
All models
Weight 0.1kg
Terminal Capacity 2.5mm2
Time out period Adjustable 10 seconds to 99 minutes.
Light level Optional adjustment by using IR
programming handsets.
Fixing method Surface fixing
35mm deep plastic surface mount moulded
box.
Flush fixing
25mm steel backbox or 25mm deep cavity
backbox.
Temperature -10ºC to 50ºC
Humidity 5 to 95% non-condensing
Material (casing) Flame retardant ABS Type Class 2
Compliance EMC-2014/30/EU
LVD-2014/35/EU
Safety The microwave radiation emitted by these
units is extremely 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.
Code suffix Region Frequency
blank UK, China, India, Middle East, Malaysia, Hong Kong, Singapore 10.687GHz
-R2 Australia and all of Europe except:
UK, France, Portugal, Germany, Switzerland, Austria, Slovak Republic, Republic of
Ireland
10.525GHz
-R3 France, Portugal, Switzerland 9.900GHz
-R4 Germany, Austria, Slovak Republic 9.350GHz
-R5 Republic of Ireland 10.41GHz
Frequency compatibility
Ref: #WD406 Issue 5
Technical data
Detection pattern Dimensions
IMPORTANT NOTICE!
This device should be installed by a
qualified electrician in accordance with
the latest edition of the IEE Wiring
Regulations and any applicable Building
Regulations.