Surge protector for bus and siren of burglary alarm system, APS-2B/1S

The surge protector APS-2B/1S protects alarm control panels from the effects of surges and lightning strikes, induced in communication bus wires and external signalers. Two independent and configurable protective circuits for communication buses allow for use in systems where separate buses exist for keypads and alarm line modules. To increase the effectiveness of protection and eliminate damage due to potential differences, MOSFET fuses have been used, and configuration jumpers have been built in to provide surge protection for RS-485 or DATA/CLOCK. The effectiveness of the protective circuits is 2kA for each wire of the cable, and high-value charges are discharged to the ground using the PE line. Since communication buses also use power, two independent protective circuits of 12VDC have been made for each of them, with an effectiveness of 2kA.

The protective circuit for the signaler has a protective effectiveness of up to 10kA for each wire of the cable, due to the installation of these devices outdoors and the high risk of large charges penetrating due to spark jumps. The protection of the signaler has been divided into one high-current circuit (2A) and two low-current circuits (100mA). The high-current circuit is used for directly powering the signaler without its own power supply or powering the signaler with a battery. The power ground of this circuit has been separated from other circuits of the surge protector, due to alarm control panels that can control signalers with ground or + power supply. The low-current circuits are used for signals controlling the acoustics/optics of signalers with their own power supply or their sabotage circuits.

The product is made in the form of a module, mounted in a dedicated housing along with other modules that can create a comprehensive protection system for all signals from the alarm control panel.

Example of protection for a signaler with its own power supply and two branches of the RS-485 bus

Example of protection for a signaler without its own power supply and two different buses

Technical Specification

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