Meder Electronic MK2 Series Ferromagnetic Metal Detection Sensors DESCRIPTION These reed proximity switches operate when in the presence of magnetically conductive material. Instead of an actuating magnet, only a simple piece of iron is required to operate the sensor - from the front or from above. The standard cable is UL listed and is round twin core 2 x 0.35 mm2 (AWG22). APPLICATIONS • Industrial applications • End travel sensing limit switch in pneumatic cylinders • Position control • Control functions in plant and utility vehicles • Security applications • Door and window control • Opening recognition contact • Fire protection doors FEATURES • Form A and B are available • High power switches available • Other cables, connectors and colors available • A choice of switch terminations and cable lengths are available DIMENSIONS All dimensions in mm [inches] ORDER INFORMATION Part Number Example SERIES CONTACT FORM SWITCH MODEL CABLE LENGTH (mm) TERMINATION MKX/X - XX XX - XXX X 1 Form A 71 500 ** W, X, Y, S* 1 Form B 90 MK2/0 - 1A71 - 500 W MK2/0 is the front operation series 1A is the contact form 71 is the switch model 500 is the cable length (mm) W is the termination OPTIONS 2/0, 2/1 2/2*, 2/3* * S option only available with 2/2 and 2/3 . ** Other cable lengths are available. www.willow.co.uk Tel. +44 (0) 1342 835234 Fax. +44 (0) 1342 834306 MK2 Series Meder Electronic Ferromagnetic Metal Detection Sensors OPERATION EXAMPLE For best operation it is recommended that you DO NOT mount these sensors on any ferromagnetic material OR use any ferromagnetic screws. The MK2/2 and 2/3 are available as Form A and Form B sensors. The standard cable is a 4-wire round - core 4 x 0.14 mm2 (cable sheath and wires are white) forming a sabotage loop. See example of this loop to the right. (Sabotage loop for MK2/2 and 2/3.) TERMINATION For wire and termination details please consult factory. www.willow.co.uk Tel. +44 (0) 1342 835234 Fax. +44 (0) 1342 834306 Meder Electronic MK2 Series Ferromagnetic Metal Detection Sensors CONTACT DATA Switch Model --> Contact Form --> All data at 20 0C Contact Ratings Conditions Contact 71 Form A Min. Typ. Contact 90 Form B Max. Min. Typ. Max. Units 10 3 W Contact Rating Any DC combination of V & A not to exceed their individual max.'s Switching Voltage DC or peak AC 200 175 V Switching Current DC or peak AC 0.5 0.25 A Carry Current DC or peak AC 1.25 1.2 A Static Contact Resistance w/ 0.5V & 10mA 150 150 mΩ Dynamic Contact Resistance Measured w/ 0.5V & 50mA 1.5 ms after closure 200 250 mΩ Insulation Resistance across Contacts 100 Volts applied 1010 * 109 Ω Breakdown Voltage across Contacts Voltage applied for 60 sec. min. 225 * 200 VDC Operate Time, incl. Bounce Measured w/ 100% overdrive 0.5 0.7 ms Reset Time Measured w/ no coil suppression 0.1 1.5 ms Capacitance @ 10kHz across contact 0.2 1.0 pF Contact Operation ** Must Operate Condition Steady state field 4.5 10 3.0 8.5 mm Must Reset Condition Steady state field 5.5 13.5 4.0 12 mm g Environmental Data Shock Resistance 1/2 sine wave duration 11ms 30 30 Vibration Resistance From 10 - 2000 Hz 10 10 Ambient Temperature 0 10 C/ minute max. allowable 0 Storage Temperature 10 C/ minute max. allowable Soldering Temperature 5 sec. dwell -20 -35 85 85 -20 -35 260 g 85 0 85 0 260 0 C C C Please note: The indicated electrical data are maximum values and can vary downwards when using a more sensitive switch. * Insulation 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.willow.co.uk Tel. +44 (0) 1342 835234 Fax. +44 (0) 1342 834306