Surge protection for alarm zone and power supply, APS-1Zo/1P/DIN

Surge protection for alarm system, used to protection of alarmu signal and power supply, mounted DIN rail, APS-1Zo/1P/DIN

The APS-1Zo/1P/DIN is a surge protection for PIR alarm detectors and alarm panel inputs against the effects of overvoltage and lightning. It is designed to alarm zones that do not use the doubling function. In the case of doubled zones it can only be used to protect the end detector.

It have two protection circuits with efficiency up to 10kA with a common ground for the alarm signal and power supply. The applied MOSFET technology reduces the level of surge voltages reaching the protected device.

This surge arrester is a universal device that can be used in alarm systems of various manufacturers and with any detectors installed inside or outside buildings (in additional hermetic enclosures). It is dedicated to protect detectors having outputs in the form of NO/NC contacts. It is not preffered for addressable detectors with digital transmission. Other protective devices should be used for addressable detectors.

The product has a housing mounted on a DIN rail and if it is necessary to install it outside the building, an additional hermetic housing must be used.

To ensure full protection of the alarm circuit, two identical APS-1Zo/1P models should be used on both ends of the cable or one in combination with other multi-channel products APS series.


Surge protection for PIR alarm detector
Example of surge protection of PIR alarm detector


Surge protection of alarm system
Complete surge protection of one alarm zone




Protection channels 2
Input / Output connection Screw terminals
Rated Voltage DC (line-ground) UN 90V DC
Maximum Voltage (line-ground) UC 110V DC
Protection level 1kV/μs (line-ground) UP 600V
Surge current (8/20µs, line-ground ) Iimp 10kA
Rated Voltage DC (line-line) UN 13.8V DC
Maximum Voltage (line-line) UC 15V DC
Protection level 1kV/μs (line-line) UP 22V (with MOSFET fuse)
Surge current (8/20µs, line-line) Iimp 2kA (with MOSFET fuse)
Decoupling element MOSFET fuse
Serial resistance 6Ω / line
Rated current IN 100mA / line
Dimensions 74 x 32 x 25 (mm)
Inside Indoor/ Outdor in additional housing
Mounting DIN rail, one module
Operating temperature -30ºC~60ºC
Housing tightness IP20