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,D Class II, Div 1, Groups E,F,G Relay Contacts 1 SPDT, Silver, 15A(1)(3) Reset / Startup Delay Coil Holding Strength(4) 1 5g Reset / Startup Delay Coil Voltage 2 230 Vac Wiring Entry / Mounting Hole Pattern(5) 1 ¾” NPT / Metrix 5173 or 5175 Environmental Rating 1 NEMA 4X / IP66 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.Consult Figure 1 for mounting plate dimensions corresponding to E options.
