Eaton SM87BG Technical Manual

5Call points sM87BG/pBEnglishCall points sM87BG/pB TM146 January 2023 www.eaton.comsM87pB pushbuttonSafety Function of SM87PB Push Button:‘To raise the alarm upon pushing the button’Architectural constraints: Type AHFT= 0SFF= 79.7%Proof Test Interval=8760HrsMTTR = 8 HrsSIL2Random hardware failures: λDD = 0λDU = 3.43E-08 λSD = 0λSU = 1.34E-07Probability of failure on demand: PFDAVG= 1.50E-04(Low Demand Mode)SIL3Probability of Dangerous failure on safetyfunction: PFH = 3.43E-08(High Demand Mode) SIL3Hardware safety integrity compliance[1] Route 1HSystematic safety integrity compliance Route 1SSystematic Capability SC2Overall SIL-capability achieved SIL 2 (Low Demand)*SIL 2 (High Demand)**Limited to SIL 2 due to SFF valueConditions of Safe useThe following conditions apply to the installation,operation and maintenance of the assessed equipment.Failure to observe these may compromise the safetyintegrity of the assessed equipment:1. The user shall comply with the requirements givenin the manufacturer’s user documentation (ThisSafety Manual and Technical manual) in regard to allrelevant functional safety aspects such as applicationof use, installation, operation, maintenance, prooftests, maximum ratings, environmental conditions,repair, etc;2. Selection of this equipment for use in safety functionsand the installation, configuration, overall validation,maintenance and repair shall only be carried out bycompetent personnel, observing all the manufacturer’sconditions and recommendations in the userdocumentation.3. All information associated with any field failuresof this product should be collected under adependability management process (e.g., IEC60300-3-2) and reported to the manufacturer.4. The unit should be tested at regular intervals toidentify any malfunctions; in accordance with thissafety manual.