Page 1SDR-WEXT Wired SirenInstallation GuideThe SDR-WEXT is an external siren and strobe unit designed foruse with i-on, Menvier and other third-party control units. Thesiren uses fixed wiring between itself and the control unit orexpander.Two models of the siren are available: SDR-WEXT-G2 (for EN 50131-4 grade 2 applications) SDR-WEXT-G3 (for grade 2 or 3 applications)The SDR-WEXT-G3 contains all features provided by theSDR-WEXT-G2, together with several additional featuresfor enhanced monitoring and system testing.This product must be installed by qualified service personnel.Key Features Easy to install 100 dB(A) sound output High-power comfort LEDs High-power LED strobes Selectable SCB or SAB mode Built-in spirit-level Self-supporting lid for ease ofinstallation Revolving fixing holes Engineer (quiet maintenance) mode Lid and rear tamper detection Selectable cut-off timer Choice of siren tones Impact-resistant polycarbonateconstructionAdditional Features for theSDR-WEXT-G3The SDR-WEXT-G3 provides the followingadditional features: Remote self-test input Built-in microphone for sounder faultreporting Optional battery fault reporting Optional monitoring of tamperconditions on Bell (Trigger) input Selectable voltage and termination fortamper returnNote: When using the SDR-WEXT-G3 withan i-on/Menvier control unit, make sure thatthe control unit has firmware version 4.05 orlater.