CHQ-DZM/DIN(SCI)-IS Intrinsically Safe Compatible Dual Zone Monitor - DIN Enclosure with SCICHQ DZM DIN(SCI) IS Intrinsically Safe Compatible Dual Zone Monitor DIN Enclosure with SCI Manufactured by Hochiki, this Hochiki CHQ DZM DIN (SCI) Is Intrinsically Safe Compatible Dual Zone Monitor Din Enclosure With SCI is Dual Zone Module which is fully compatible with Hochiki's ESP analogue addressable protocol and I. S. equipment. It is supplied as a DIN Rail mountable module, a boxed version is also available. Addressing is achieved via simple