Ordering Information Model 5550 Mechanical Vibration Switch Hazardous Area Rating 2 UL US/CA Explosion Proof , silver contacts(1)(2)Class I, Div 1, Groups B,C,DClass II, Div 1, Groups E,F,G Relay Contacts 2 DPDT, Silver, 15A(1)(3) Reset/Startup Delay Coil Holding Strength(4) 1 5 g Reset/Startup Delay Coil Voltage 0 None(4)(5) Wiring Entry/Mounting Hole Pattern 1 ¾” NPT / Metrix 5173 or 5175 Environmental Rating 0 NEMA 4 / IP66(5) Options A=0 through A=4 are only compatible with B=1 or B=2.Options A=5 through A=9 are only compatible with B=3 or B=4.UL US/CA approvals require tapered threads for conduit and are not compatible with option E=4, 6, or 8. INMETRO approvals (A=11) available with silver relay contacts only (B=1 or B=2)When D=0 (no reset /startup delay coil), the C option is ignored regardless of which value is selected. All switches ship with a full scale range of approximately 16gs.If left blank, option 0 is provided.
