Switch Block - Honeywell SC105 Installation & User Manual

Switch Block

This block contains the DIP switches for sensitivity settings, application settings and the noise
LED settings, further communicating with the micro controller and signal conditional blocks.
Micro Controller Block
This block is the heart of Detector SC105. It handles functions for signal analysis and recognition,
circuit supervision of power supply and temperature, noise recognition and indication, test and
sensitivity reduction etc.
It also contains a watchdog function which is used to detect system lockups and create an alarm
signal to the output alarm block. This block contains nano watt technology and the software code
stored in a flash program memory with code protection.
Output Alarm Block
The circuits in the output alarm block will be activated by the micro controller block when intrusion
attack signals are recognized. The alarm output provides two forms of alarm signals:
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The transistor is protected against overload with a series resistor of 1.38k ohm.
Power Supply Block
The input circuits are very well protected against electrical interference and high energy electrical
surges by filtering, transient absorber and spark gaps. The small mechanical dimensions, circuit
board layout and design, results in very good resistance against RFI from various transceivers,
cellphones and so on. Detector SC105 has a vide supply voltage range from 8 to 16 VDC due to
the low internal system voltage of 5 Volt.
Sabotage Protection
Mini-Seismic Vibration Detector SC105 has a full range of tamper protection facilities, thus an
alarm will be given when an attempt is made to:
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The detector is equipped as standard with a stainless steel drill shield that makes it difficult to drill
into the detector and at the same time generates strong vibrations.
One potential free solid state SPST breaking relay.
One open collector transistor output, going into conductive mode upon alarm condition.
No protection against sabotage attempts with external magnetic fields is needed due to solid
Note
state alarm relay.
Pry off the detector from the protected surface
Open the detector
Disable the detector by heat
Lower the supply voltage below 6.5V
Honeywell
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