STL MWS-Ex-DC User manual

MICROWAVE PRESENCE DETECTOR
FOR ZONE 1/21
STL Reference:
Date:
Revision:
MWS-Ex-DC
July 2020
IOM-MWS-iss0
Document: Installation and Operations Manual
P a g e | 1
1 Safety information and Notes
1.1 Storage of this manual
Keep this user manual safe and in the vicinity of the device. All persons who work on or with it should be advised on
where the manual is stored.
1.2 Special conditions of safe use
The rated temperature range is listed on the label and is more restricted than in the certificate.
1.3 List of notes
WARNING!
Installation to be by skilled electricians and instructed personnel in accordance with national
legislation, including the relevant standards and, where applicable, in accordance with IEC
79.17 on electrical apparatus for explosive atmospheres.
WARNING!
For the installation, maintenance and cleaning of the sensor, it is absolutely necessary to
observe the latest applicable regulations and provisions concerned with explosion protection
(EN60079-0, EN60079-14) as well as the Accident Prevention Regulations.
WARNING!
The sensor can be operated in ATEX Gas/Dust Zone 1/21 or Zone 2/22 hazardous area, or in
safe area. Refer to the ATEX certificates for further information.
WARNING!
The sensor must not be stored or operated outside of its rated temperature range as stated
on the ATEX certification label
WARNING!
The technical data indicated on the ATEX rating labels, this manual and the ATEX certificates
must be observed at all times.
MWS-Ex-DC

STL Reference:
Date:
Revision:
MWS-Ex-DC
July 2020
IOM-MWS-iss0
Document: Installation and Operations Manual
P a g e | 2
WARNING!
The ATEX rating labels must be fitted at all times, if damaged they must be replaced
immediately or the sensor must be removed from service and the hazardous area.
WARNING!
Changes to the design and modifications to the equipment are not permitted.
WARNING!
Never operate the sensor outside its rated voltage, current and power as indicated in the
specification or the safety of the unit may be impaired.
CAUTION
Ensure that the sensor is mounted safely and securely using suitable fixings.
2 Technical Specification
The sensor is an active motion detector which emits a high-frequency electromagnetic wave and receives its echo. The
sensor detects the change in echo from movement in its detection zone. A microprocessor then triggers the ON
command. Detection is possible through doors, panels of glass and thin walls.
2.1 Specification
Type:
Ex rating:
Voltage:
HF System:
Transmission Power:
Rated Load:
Terminals:
Operating Temperature:
Detection Angle:
Power Consumption:
Detection Range:
Time Setting:
Light Control:
Entries:
MWS-Ex-DC (Housing CPST-26/EMH90)
ATEX II 2GD / Ex db IIC T6 Gb / Ex tb IIC T85°C Db IP66
INERIS03ATEX0009X
12-48Vdc
5.8GHz CW radar
<0.2mW
12V≤10A, 24Vdc≤5A, 48Vdc≤2A
Up to 4mm2max
-35°C to +55°C
30~150°
Approx. 0.5W
Max. 8m in diameter, adjustable
5s~30min
2~50Lux, Disable
2 x M25 threaded entries (1 x M25 Exd stopping plug supplied)
NOTE:
The high-frequency output of this sensor is <0.2mW. This is approximately 1% of the
transmission power of a mobile phone.
2.2 Dimensions

STL Reference:
Date:
Revision:
MWS-Ex-DC
July 2020
IOM-MWS-iss0
Document: Installation and Operations Manual
P a g e | 3
3 Installation and Wiring
WARNING:
Please ensure that the electricity supply is switched OFF before installing or servicing the
sensor.
DO NOT OPEN THE Exd ENCLOSURE WHEN ENERGISED
WARNING:
DO NOT OPEN IF AN EXPOSIVE ATMOSPHERE IS PRESENT
The sensor has a 4-wire electrical interface (4mm2max):
- I/P (supply input –12-48Vdc)
1 x Positive (+)
1 x Negative (-)
- O/P (Output to load –same as supply)
1 x Positive (+)
1 x Negative (-)
3.1 Wiring
3.2 Settings and Functions
ON/OFF function:
A single sensor can trigger multiple pieces of equipment or luminaires. The
output voltage is the same as the supply voltage.
Connect ‘+’ and ‘–‘ to the drivers/ballasts of the grouped fittings for
simultaneous switching.

STL Reference:
Date:
Revision:
MWS-Ex-DC
July 2020
IOM-MWS-iss0
Document: Installation and Operations Manual
P a g e | 4
a. Detection Range:
The sensor sensitivity
can be adjusted by
selecting a combination
of 4 DIP switches to
suit the application.
(50% is the factory default
–switches 1,2 and 4 ON,
switch 3 OFF)
b. Time Delay
The ON-time of the light, after the person/object leaves the
area, can be selected with a combination of 4 DIP
switches.
(5 seconds ‘Walk test mode’ is the factory default –all switches
ON)
c. Daylight Threshold
The threshold can be selected with a combination of 4 DIP
switches. The light will not switch ON if the ambient lux
level exceeds the programmed daylight threshold.
(Please note that the ambient lux level refers to the amount of light reaching
the sensor internally).
If the daylight sensor is disabled, the sensor will only
operate when movement is detected.
(Daylight sensor disabled is the factory default –all switches ON)
4 Contact
STL International Ltd
Hill Farm, Linton Hill
Maidstone, Kent
ME17 4AL
United Kingdom
Tel : [phone]
Fax : [phone]
eMail : [email protected]
Web : www.stl-int.co.uk
Other Sensors:
Microwave Sensor (AC)
Daylight Sensor: