Model CHQ-SZM2(SCI) is a Single Zone Monitor designed to allow up to 6 conventional detectors to be interfaced with Hochiki's ESP analog addressable system. The unit is also available as a DIN Rail mountable version with or without an integral short-circuit isolator. The CHQ-SZM2(SCI) utilizes simple DIL switches for reliable addressing. A back box is also available (CHQBACKBOX) which, when used in conjunction with the CHQSZM2(SCI), increases the IP rating to IP65.