Ordering Information Model 5550 Mechanical Vibration Switch Hazardous Area Rating 1 UL US/CA Explosion Proof , silver contacts(1)(2) Class I, Div 1, Groups C,D Class II, Div 1, Groups E,F,G Relay Contacts 1 SPDT, Silver, 15A(1)(3) Reset / Startup Delay Coil Holding Strength(3) 1 5g Reset / Startup Delay Coil Voltage 1 115 Vac Wiring Entry / Mounting Hole Pattern(4) 2 ¾” NPT / Metrix 5097, VS-2 EX, or 366 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 fullscale range of approximately 16gs.
