C.P. Electronics MWS3A-PRM Product Manual

Ceiling microwave presence/absence detector

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MWS3A-PRM
Ceiling microwave presence/absence detector
Front features
Mounting Bezel
Back features
Retaining Spring
Power Input
& Switched
Output Connector
Retaining Spring
Product Guide
The MWS3A-PRM microwave presence detector provides
automatic control of lighting loads with optional manual
control.
The MWS3A-PRM 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 output channel comprises a mains voltage relay
capable of simple on/off switching.
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.
The MWS3A-PRM has a unique adjustable sensor head
that allows the area of detection to be optimised for the
application.
All functionality is fully programmable using an IR handset.
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
Measures the overall light level in the detection area
Status LEDs
Sensor Lens
which covers...
The LED flashes Red to indicate the following:
Microwave Sensor
Walk Test LED active
IR Receiver
Light Level Sensor
Valid setting received
Status LEDs
Power Input & Switched Output Connector
Used to connect mains power to the unit and to connect a
switched load.
Switch Input Connector
Two input terminals can be used to manually override the
lights on or off.
Switch Input
Connector
Overview
Features
when movement is detected

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Summary of Contents for C.P. Electronics MWS3A-PRM

  • Page 1 Optional settings allow lights to be turned off in response to ambient daylight. The MWS3A-PRM has a unique adjustable sensor head that allows the area of detection to be optimised for the application.
  • Page 2: Sensor Functionality

    Detection diagrams Ideal for corridor or aisle applications Ideal for large office or classroom Note. If the range is compromised by the ceiling construction / material. Add the supplied 20mm spacer ring. See page 4 for fitting details. Ideal for open plan areas and offices Sensor functionality Detection Mode The Detection Mode can be set to behave in Presence or Absence mode:...
  • Page 3: Installation

    Installation Choosing a Suitable Location The detector should be sited so that the occupants of the room fall inside the detection pattern shown opposite).  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. ...
  • Page 4 Installation The MWS3A-PRM 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.
  • Page 5: Basic Programming

    Basic programming The functionality of the MWS3A-PRM 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.  UNLCDHS Infrared Handset (with LCD). See user guide for full programming details.
  • Page 6: Advanced Programming

    Advanced programming UHS5 UNLCDHS Parameter Name Default Value Range / Options Description Detector Parameters Walk Test LED On or 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. Once the detector is turned on, this value sets how long the lights will stay on once ...
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  • Page 8: Technical Data

    Universal LCD IR handset 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. C.P. Electronics Ltd Brent Crescent London NW10 7XR United Kingdom...

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