CP Electronics VITMR-MWS3A-PRM - Manual (Page 2)

page 2
2. Description and Operation
The VITMR-MWS3A-PRM (microwave) detector provides automatic control of lighting loads with optional
manual control. It can be used on incandescent, fluorescent and compact fluorescent lighting, and has the
added benefit of being able to connect an external switch. The VITMR-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 VITMR-MWS3A-PRM has a
unique adjustable sensor head that allows the area of detection to be optimised for the application. These
sensors are supplied pre-wired with a 3m lead and include a ceiling rose for ease of installation.
Two modes of operation are available:
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. If an external switch is connected, this
can override the lights off (after the detection time period has elapsed it will revert to automatic operation).
An integral adjustable photocell allows the lights to be kept off if there is sufficient ambient light.
Absence detection:
The load is manually switched on using an external switch. When the area is no longer occupied the load
will automatically switch off after the adjustable time period has elapsed. Pressing the switch again during
occupancy override the lights off (after the detection time period has elapsed it will revert to automatic
operation).
In both modes of operation a short button press turns the load on whilst a long button press turns the load
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.
LUMINAIRE
Live
CIRCUIT PROTECTION
(IF REQUIRED)
Permanent
Live
VITM-ROSE
Screw fixings to
conduit box
Earth
Neutral
Live supply
Each pole has two screw terminals.
Each terminal accepts 1 x 2.5mm 2
CEILING ROSE WIRING
INTERNAL
DETECTOR WIRING
Where absence detection or override is required, wire the switch directly to the detector or use the
VITM4 series of marshalling boxes