Page 1SDR-REXT Radio SirenInstallation GuideThe SDR-REXT is an external siren and strobe unit designed foruse with i-on and Menvier control units. Radio communicationsare used between the siren and the control unit, which means thatno fixed wiring between the two is needed.This product must be installed by qualified service personnel.Key Features Easy to install 100 dB(A) sound output Range of 500m in free space High-power comfort LEDs High-power LED strobes Built-in spirit-level Self-supporting lid for ease ofinstallation Jamming detection Revolving fixing holes Engineer (quiet maintenance) mode Battery voltage monitoring Lid and rear tamper detection Selectable cut-off timer Choice of siren tones Impact-resistant polycarbonateconstructionTable of ContentsInstalling the Siren 1Quick Reference 3Installer (Engineer) Mode 4PCB Jumper Details 4Set Conf 4Jam Det 4Tone 4Time 4Comfort LED Operation 4Fault and Tamper Monitoring 5Summary of Strobe Operation 5Maintenance 5Specifications 5Installing the SirenStep 1 – Choose a Location for the SirenChoose a location that is: Out of reach of intruders and vandals. Easily visible for maximum deterrence. Within radio range of the controlunit/expander (max 500m in freespace). Note: Prior to installation, aradio signal-strength survey should becarried out using the optional EatonSurvey Tool.