MEDER electronic MK21 Series Reed Sensors with Mounting Holes for Screw Fastening DESCRIPTION MK21 sensors are magnetically operated Reed proximity switches designed for screw mounting. The sensor should be mounted on a fixed surface with the actuating magnet on the moving surface. Introduction or removal of the magnetic field determines the closing and opening of the Reed Switch. Leads are teflon coated. Designed for extreme environment. High temperaturs, 150 °C Imprevions to water, fuels, oils, inks and most acids. APPLICATIONS • 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/flap control FEATURES • • • • High power switches available Other cables, connectors and colors available Four operate sensitivities available A choice of cable terminations and lengths are available DIMENSIONS All dimensions in mm [inches] www.meder.com Germany # ++49-(0)7733-94870, USA # 800-870-5385 225 MK21 Series MEDER electronic Reed Sensors with Mounting Holes for Screw Fastening ORDER INFORMATION Part Number Example SERIES CONTACT FORM SWITCH MODEL MAGNETIC SENSITIVITY CABLE LENGTH (mm) TERMINATION MK21 - 1A XX X - XXX W 66 B, C , D , E 84 C, D, E OPTIONS 500 * MK21 - 1A66 C - 500 66 is the switch model C is the magnetic sensitivity 500 is the cable length (mm) * Other cable lengths available. MAGNETIC SENSITIVITY SENSITIVITY CLASS PULL IN AT RANGE B 10 - 15 C 15 - 20 D 20 - 25 E 25 - 30 TERMINATION For wire and termination details please contact factory. www.meder.com 226 W Germany # ++49-(0)7733-94870, USA # 800-870-5385 MEDER electronic MK21 Series Reed Sensors with Mounting Holes for Screw Fastening CONTACT DATA Switch Model --> Contact For m --> All data at 20 0C Contact Ratings Conditions Switch 66 For m A Min. Typ. Switch 84 For m A Max. Min. Typ. Max. Units 10 10 W Switching Power Any DC combination of V & A not to exceed their individual max.'s Switching Voltage DC oder peak AC 200 400 V Switching Current DC oder peak AC 0.5 0.5 A Carry Current DC oder peak AC 1.25 1.0 A Static Contact Resistance w/ 0.5 V & 10mA 150 150 mΩ Dynamic Contact Resistance Measured w/ 0.5 V & 50 mA 1.5 ms after closure 200 200 mΩ Insulation Resistance across Contact 100 Voltapplied 1010 * 1011 Ω Breakdown Voltage across Contact Voltage applied for 60 sec. min. 225 * 700 VDC Operate Time, incl. Bounce Measured w/ 50 % overdrive 0.5 2.0 ms Release Time Measured w / no coil suppression 0.1 0.1 ms Capacitance @ 10 kHz across contact 0.2 0.7 pF Contact Operation** Must Operate Condition Steady state field 10 30 15 30 AT Must Release Condition Steady state field 4 27 6 27 AT g Environmental Data Shock Resistance ½ sine wave duration 11 ms 50 50 Vibration Resistance From 10 - 2000 Hz 20 20 0 g Ambient Temperature 10 C/ minute max. allowable -30 150 -30 150 0 Storage Temperature 10 0C/ minute max. allowable -40 160 -40 160 0 Soldering Temperature 5 sec. dwell 260 0 260 C C C Please note: The indicated electrical data are maximum values and can vary downwards when using a more sensitive switch. * Insulaton resistance of 1012 and breakdown voltage of 480 VDC is available. ** These ranges refer to the uncut / unmodified Reed Switches described in our Reed Switch section. Consult factory if more detail is required. www.meder.com Germany # ++49-(0)7733-94870, USA # 800-870-5385 227