270 www.meder.com meder electronic description applications mk21 series reed sensors with mounting holes for screw fastening position and limit switch pneumatic or hydraulic actuator position end motion detection for linear drive indication and end travel limit switch machine industry end motion detection and door/fap control ? ? ? dimensions all dimensions in mm [inch] features high power switches available designed for high temperature up to 160 o c (molded version) four operate sensitivities available a choice of cable terminations and lengths are available molded and potted versions available ? ? ? ? ? mk21 sensors are magnetically operated reed proximity switches designed for screw mounting. the sensor should be mounted on a fxed surface with the actuating magnet on the moving surface. introduction or removal of the magnetic feld determines the closing and opening of the reed switch. leads are tefon coated. designed for extreme environment. resistant to water, fuels, oils, inks and most acids.
271 www.meder.com meder electronic mk21 series reed sensors with mounting holes for screw fastening magnetic sensitivity termination for wire and termination details, as well as other magnetic sensitivity classes please contact factory. part number example mk21m - 1a66 c - 500 w mk21p - 1a66 c - 500 w m = molded p = potted 66 is the switch model c is the magnetic sensitivity 500 is the cable length (mm) order information sensitivity class pull in at range b 10 - 15 c 15 - 20 d 20 - 25 e 25 - 30 series contact- form switch model magnetic sensitivity cable length (mm) termination mk21x- xx xx x - xxx w options 1 form a 66 b, c, d, e 500* 52, 85 c, d, e 1 form b* 1 form c** 90 c, d, e * other cable lengths available ** potted version w the cable cut length includes: 5 mm of wire stripped and tinned.
272 www.meder.com meder electronic mk21 series reed sensors with mounting holes for screw fastening contact data all data at 20 c switch model contact form switch 52 form a switch 66 form a contact ratings conditions min. typ. max. min. typ. max. unit switching power any dc combination of v & a not to exceed their individual max.s 50 70 (va) 10 w switching voltage dc or peak ac 250 200 v switching current dc or peak ac 0.5 0.5 a carry current dc or peak ac 2.5 1.25 a static contact resistance w/ 0.5 v & 10 ma 200 150 p dynamic contact resistance measured w/ 0.5 v & 50 ma , 1.5 ms after closure 200 p insulation resistance across contact 100 volts applied 10 10 10 10 * breakdown voltage across contact voltage applied for 60 sec. min. 600 225* vdc operate time incl. bounce measured w/ 100 % overdrive 1.0 0.5 ms release time measured w/ no coil suppression 0.1 0.1 ms capacitance at 10 khz cross contact 0.2 0.2 pf contact operation ** must operate condition 6whdvwdwhho 10 30 10 60 at must release condition 6whdvwdwhho 4 27 4 54 at environmental data shock resistance 1/2 sinus wave duration 11 ms 50 50 g vibration resistance from 10 - 2000 hz 20 20 g ambient temperature m 10c/ minute max. allowable -20 85 -30 150 o c ambient temperature p 10c/ minute max. allowable -35 85 -20 85 o c stock temperature 10c/ minute max. allowable 260 -40 160 o c soldering temperature 5 sec. 260 260 o c please note: the indicated electrical data are maximum values and can vary downwards when using a more sensitive switch. * insulation resistance of 10 12 and breakdown voltage of 480 vdc is available. 7khvhdhvhihwrwkhfwprlh5hh6lwfkhvhvflehlr5hh6lwfkvhfwlr&rvowidfwrli more detail is required.
273 www.meder.com meder electronic mk21 series reed sensors with mounting holes for screw fastening contact data all data at 20 c switch model contact form switch 85 form a switch 90 form b/c, potted contact ratings conditions min. typ. max. min. typ. max. unit switching power any dc combination of v & a not to exceed their individual max.s 100 20 w switching voltage dc or peak ac 400 175 v switching current dc or peak ac 1.0 0.5 a carry current dc or peak ac 2.5 1.0 a static contact resistance w/ 0.5 v & 10 ma 150 150 p dynamic contact resistance measured w/ 0.5 v & 50 ma , 1.5 ms after closure 200 250 p insulation resistance across contact 100 volts applied 10 10 10 9 breakdown voltage across contact voltage applied for 60 sec. min. 4000 200 vdc operate time incl. bounce measured w/ 100 % overdrive 1.0 0.7 ms release time measured w/ no coil suppression 0.1 1.5 ms capacitance at 10 khz cross contact 0.2 1.0 pf contact operation ** must operate condition 6whdvwdwhho 20 60 15 40 at must release condition 6whdvwdwhho 12 54 at environmental data shock resistance 1/2 sinus wave duration 11 ms 50 50 g vibration resistance from 10 - 2000 hz 20 20 g ambient temperature m 10c/ minute max. allowable -20 85 -20 85 o c ambient temperature p 10c/ minute max. allowable -35 85 -35 85 o c stock temperature 10c/ minute max. allowable 260 260 o c soldering temperature 5 sec. 260 260 o c please note: the indicated electrical data are maximum values and can vary downwards when using a more sensitive switch. * insulation resistance of 10 12 and breakdown voltage of 480 vdc is available. 7khvhdhvhihwrwkhfwprlh5hh6lwfkhvhvflehlr5hh6lwfkvhfwlr&rvow factory if more detail is required.
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