proximity sensors 4/6fr series one-piece ferromagnetic actuated reed proximity switches b70 honeywell 1 micro switch sensing and control 1 1-800-537-6945 usa 1f 1-815-235-6847 international 1 1-800-737-3360 canada features 1 internal dry reed switch, ferrous metals sensitive 1 one piece construction aluminum housing 1 single pole, single throw, normally open circuitry 1 may be used to directly drive low energy circuits 1 long mechanical life 1 completely potted enclosure 1 hermetically sealed contacts 1 no-touch detection of ferrous metals 1 standard 1/2 inch conduit outlet 1 can detect ferrous metal through non-ferrous metal. example: steel through stainless steel. fr order guide catalog listing heavy duty sensitivity* must lead length wires cable in. (mm) operate pt. feet/mm 4fr1-6 4fr2-25 0.50/12,7 0.35/8,9 6.0/1,83 6FR1-6 6fr2-6 0.75/19,1 0.60/15,2 6.0/1,83 * nominal for low carbon steel, 1 x 3 x 0.25 in. (25,4 x 76,2 x 6,35 mm). note: 25 and 50 ft. (7,6 and 15,2m) lead lengths can be supplied, but longer lead lengths are not necessarily stock items. 6FR1-6: 589,5g (20.8 oz) characteristics circuitry single pole, normally open response time 1 millisecond repeatability (constant actuator 0.005 inch (0,13mm) path, at stabilized temperature) power rating ac (maximum) 15 va, 500 ma, 280 v rms dc (maximum)* 15 watts, 500 ma, 400 v initial contact resistance (closed circuit) 0.060 ohm max. switching frequency dependent on size and speed of target. has been tested to 100 hz, but should be operated at less than 700-800 hz resonant frequency. reed bounce time 0.5 millisecond max. operating life max. load 100,000 operations min. with 5fd1 relay load 50 million operations temperature range 20 to + 83 c ( 4 to + 181 f) * dc rating with contact protection diode [n2071, international rect. 10d6, 600v. 1 amp or equivalent] for increased life. mounting dimensions (for reference only)
proximity sensors 4/6fr series one-piece ferromagnetic actuated reed proximity switches honeywell 1 micro switch sensing and control 1 1-800-537-6945 usa 1f 1-815-235-6847 international 1 1-800-737-3360 canada b71 effects of temperature on sensitivity for proper operation over the total temper- ature range [with typical actuator (#4)], use a minimum overtravel of 0.150 in. (3,8mm) and minimum release travel of 0.250 in. (6,35mm). overtravel and release travel will differ for smaller actuators. mass or actuator size vs sensitivity magnetic attraction the switch exerts a magnetic force on the actuator. the actuator should be secured to prevent its being drawn to the sensing face. 1. do not subject the switch to the influence of strong magnetic fields. external per- manent magnets should be a minimum of 6 inches (152mm) from the switch. 2. ferromagnetic materials (other than the actuator) should be at least 3 inches (76,2mm) from the sensing face. 3. arc suppresion networks must be used in inductive circuits. 4. these switches should not be subjected to severe shock. 5. mount on solid support and protect from vibration. 6. the switch may fail to release if adjacent steel parts are too close, or if quantities of metallic chips are attracted to the sens- ing face. 7. do not subject reed switches to high in- rush currents. 8. each 4/6fr contains a glass reed switch and a magnet, and should be handled and applied accordingly. proximity
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