CHQ-DZM/DIN(SCI) Dual Zone Monitor - DIN Enclosure with SCICHQ DZM DIN(SCI) Dual Zone Monitor DIN Enclosure with SCI Manufactured by Hochiki, this Hochiki CHQ DZM DIN (SCI) Dual Zone Monitor Din Enclosure with SCI is a Dual Circuit Zone Controller designed to allow up to 60 conventional detectors (30 on each zone) to be interfaced to Hochiki's ESP analogue addressable system. The unit also features a Schottky Diode line continuity option, when used in conjunction with the optional LCMU. Full monitoring