94 INSTALLATION AND OPERATION MANUAL 25-16327-B November 2020 www.eaton.comSection 4: AppendixIntrinsically safe zone monitor unit wiring (CZMU352-IS)Installation1 Separate the two halves of the unit2 Drill out (or knock out) the required cable entries in the surface mounting backbox3 Fit the back-box in position and pass the wires into it4 Connect the unit according to the diagram below5 Recommended Cable Type: FIRETUF, FP200, MICCote:N No addressing of the interface is required See control panel operationfor details There are no serviceable parts so no maintenanceprocedures applyStandard connectionsote:N1 This detection zone can only be used with intrinsically safe detectors SLR-E-IS(optical) / DCD-1E-IS (Heat) with the non-diode base YBN-R/4IS2 The call point zone can only be used with BG3 I/S call points3 Only connect cable screen to its adjacent earth terminal4 The end of line resistor must always be fitted, even if the spur is unused5 Maximum spur length – See BS5839 Pt1:2001 for Zone Coverage