2 Engineering2.6 ApprovalsCMD(220-240VAC), CMDB 12/17 MN121002ZU-DEEN www.eaton.com 29At an assumed operating frequency of 3 operations per day up to NZM2 and1.33 operations per day for the NZM3 the MTTFD value is:Table 3: MTTF D values for undervoltage releases2.6 ApprovalsThe CMD contactor monitoring device is approved by the IFA in combinationwith Eaton contactors and circuit-breakers (→ section 1.2, “Systemoverview”, page 24).A CE declaration of conformity and a prototype test certification are alsoavailable.The contactor monitoring device CMD has UL and CSA approval for the USand Canadian markets.2.7 Product standardThe CMD contactor monitoring device meets the product standard forLow-voltage switchgear and controlgear – Part 5-1:Control circuit devices and switching elements – Electromechanical controlcircuit devices, DIN/EN 60947-5-1 (IEC 60947-5-1).2.8 Electromagnetic compatibility (EMC)No particular EMC measures are required for the CMD contactor monitoringdevice.The CMD complies with the following regulations:• DIN/EN 61000-6-2: EMC generic standard,interference immunity for the industrial environment,• DIN/EN 61000-6-4: EMC generic standard,emitted interferences for the industrial environment.UndervoltagereleaseB10D value nop MTTFDswitchoperationsoperations perworking dayoperations/yearyearsNZM1 10000 3 750 133NZM2 10000 3 750 133NZM3 7500 1.33 333 225→ An annual inspection meets the requirements in accordancewith section → section 2.4, “Average diagnostic coverageDCavg”, page 26.For further calculation of the safety function see EN/ISO 13849.