In such case, connect 24 V power supply to battery charger only, with an adherence to proper polarity. Operating mode is one of the opportunities requiring only single conductor-pair wireing, but providing, as a result, a lower security. (Three and four wire connecting or power loss start up.) The siren is designed for special and different applications. ![]() The pressure chamber size is big and the sound pressure level (118 dB).Īs needed the tamper switch can be connected on „Tamper” jumper, which might be useful in case of sabotage. One of the biggest advantages of the siren is the high quality pressure chamber loudspeker. The house interior is made of flexible steel. In case of fire alarm the siren will be flashing and beeping simultaneously.The double cover is very showy, additionally very durable. ![]() External fire siren with pressure chamber, red colour ABS housing.
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