496350 Issue 1
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The Twintec is Microprocessor based and uses digital signal processing
techniques combined with Energy/Frequency analysis on PIR channel and
M.E.V. (Multi Event Verification) on microwave channel.
Complete metallic shielding of the electronic circuitry stops false alarms
caused by RFI. Optical and software filters stop false alarms caused by white
light and fluorescent lighting. The range of the microwave sensor may be
selected to limit coverage to the area requiring protection.
Two sets of relay contacts are provided. The alarm contacts are Single Pole
Change-over in alarm (NO/C/NC) and the tamper contacts are closed with
the cover on.
Technical Specification
The detector comprises a white textured ABS chassis, a cover containing the
lens and a metallic shielded printed circuit board which can be removed to
aid installation.
Supply Voltage
8-15V DC.
Current
20mA.
Relay Output
SPCO, 30V, 100mA DC.
Change-over in alarm with 22ohm resistor in series
Tamper Output
SPST, 30V, 100mA DC.
Closed with cover on.
Detection Pattern
Conical (see Figure 1).
Operating Temp
-10°C to +55°C.
MW Range
Adjustable100- 30% by potentiometer.
Microwave
Dielectric Resonant Oscillator with microstrip
antenna 10.687 GHz.
Infra Red Sensor
Dual element pyroelectric detector, hermetically-
sealed.
Microwave
In the event of microwave section failure, Supervi-
sion reverts unit to PIR only operation and causes
PIR to convert from Single Edge to Double Edge
PIR operation. Alarm/Test/Trouble LED flashes
every second if programmed for Trouble. Detector
pcb ‘Trouble’ output also operates with open
collector to 0V.
RFI/EMI Immunity
Unit will not alarm when subjected to RFI signals of
1MHz to 1GHz with a field strength of 10 Volts/
Metre.
Fluorescent Tube
Will not alarm from an 80W, 1.83m tube positioned
482mm above and 1.98m Immunity in front of the
unit and cycled I minute On and 30 seconds Off.
1084
Technical Specification
