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8PA77-EX Datasheet(PDF) 2 Page - Honeywell Solid State Electronics Center |
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8PA77-EX Datasheet(HTML) 2 Page - Honeywell Solid State Electronics Center |
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2 / 7 page  Limit and Enclosed Switches EX Series Explosion-Proof Switches Honeywell Sensing and Control 1-800-537-6945 USA 1-815-235-6847 International 1-800-737-3360 Canada A121 Single-Conduit Connect Switch* * See page A124 for double conduit connect switches. EX switches feature the smallest UL-listed housings available for use in hazardous lo- cations. Flame paths within the housing cool exploding gases below the kindling temperature before they reach the explosive gases surrounding the housing. The enclosed switching unit, which is held in place by screws, is accessible when the cover plate is removed. A tapped conduit opening is located in one end of one group of EX listings (pages A122-A123); while a second group (page A124) has a conduit opening in each end of the switch. These switches are not sealed against liq- uids and are not intended to be subjected to liquid splash or for outdoor applications. If a sealed explosion-proof switch is required, refer to the type CX and LSX. ELECTRICAL RATINGS Circuitry Electrical Ratings A UL/CSA Rating: 15 amps, 125, 250 or 480 VAC; 1 ⁄8 Hp, 125 VAC; 1⁄4 Hp, 250 VAC; 1 ⁄2 amp, 125 VDC; 1⁄4 amp, 250 VDC. Single-Pole Double-Throw B UL/CSA Rating: 20 amps, 125, 250 or 480 VAC; 10 amps, 125 VAC ‘‘L’’; 1 Hp, 125 VAC; 2 Hp, 250 VAC; Single-Pole 1 ⁄2 amp, 125 VDC; 1⁄4 amp, 250 VDC. Double-Throw C UL/CSA Rating: 10 amps, 125 or 250 VAC; 0.3 amp, 125 VDC; 0.15 amp, 250 VDC. Double-Pole Double-Throw D UL/CSA Rating: 10 amps, 125, 250 or 480 VAC; 1 ⁄2 amp, 125 VDC; 1⁄4 amp, 250 VDC. Single-Pole Double-Throw E UL Rating: 1 amp, 125 VAC. Single-Pole Double-Throw FEATURES NEMA 1, 7 and 9 Compact, rugged housing Up to 20 amp capacity Ample wiring space Mounts from 4 sides Roller arms adjustable through 360° Non-sparking actuators Captive cover screws UL Listed, file #E14274 CSA Certified, file #LR57324 Grounding screw NEMA NEMA standards: 1, 7 and 9. UL listed and CSA certified: Class I, Div. 1, Groups B, C and D (Group B - only as noted in order guides); and Class II, Div. 1, Groups E, F and G. Also refer to NEMA application note in the Reference Standards section at the rear of this catalog. TEMPERATURE RANGE EX switches are for use in a temperature range of –40 to 160°F (–40 to 71°C). For applications outside these limits, please call the 800 number. ACTUATORS Roller arm versions are designed for cam or slide operation. Listings include clockwise and counterclockwise actuation. Levers are adjustable through 360°. The roller is non- sparking material. The cross-roller arm switch is for use where the operating mechanism approaches from a direction perpendicular to the longitudinal axis of the switch. The overtravel plunger has a case harden- ed, radius tipped, push-rod plunger guided by a sturdy bushing. The manually operated switch has a large paddle-shaped actuator. REPLACEMENT PARTS Available replacement parts are listed on page A125. An installation sheet packed with each switch describes these parts in detail and explains how they are installed. |
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