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MK21 Series
Reed Sensors with Mounting Holes for Screw Fastening
MEDER electronic
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. Resistant 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 * Designed for high temperature up to 160 oC (molded version) * Four operate sensitivities available * A choice of cable terminations and lengths are available * Molded and potted versions available
DIMENSIONS
All dimensions in mm [inches]
www.meder.com
228
Europe # ++49-(0)7733-94870, USA # 800-870-5385
MEDER electronic
MK21 Series
Reed Sensors with Mounting Holes for Screw Fastening
ORDER INFORMATION
Series MK21X Contactform XX 1 Form A Options
1 Form B"* 1 Form C**
Switch Model XX 66 84 90
Magnetic Sensitivity XB, C, D, E C, D, E C, D, E
Cable Length (mm) XXX
Part Number Example
Termination W
MK21M - 1A66 C - 500 MK21P - 1A66 C - 500 M = molded P = potted
W W
500*
* Other cable lengths available ** Potted version
66 is the switch model C is the magnetic sensitivity 500 is the cable length (mm)
MAGNETIC SENSITIVITY
Sensitivity Class Pull IN At Range
B C D E
10 - 15 15 - 25 20 - 25 25 - 30
TERMINATION
For wire and termination details, as well as other magnetic sensitivity classes please contact factory.
W
The cable cut length includes: 5 mm of wire stripped and tinned.
www.meder.com
Europe # ++49-(0)7733-94870, USA # 800-870-5385
229
MK21 Series
Reed Sensors with Mounting Holes for Screw Fastening
MEDER electronic
CONTACT DATA
All Data at 20 C Contact Ratings
Switching Power Switching Voltage Switching Current Carry Current Static Contact Resistance Dynamic Contact Resistance
Switch Model --> Contact Form --> Conditions
Any DC combination of V & A not to exceed their individual max.`s DC or peak AC DC or peak AC DC or peak AC w/ 0.5 V & 10 mA Measured w/ 0.5 V & 50 mA , 1.5 ms after closure
Switch 66 Form A
Switch 84 Form A
Switch 90
Form B/C, potted
Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Units
10 200 0.5 1.25 150 200 1010*
225*
10 400 0.5 1.0 150 200 1011
700
3 175 0.25 1.2 150 250 109 200
W V A A m m VDC
Insulation Resistance across 100 volts applied Contact Breakdown Voltage across Contact Voltage applied for 60 sec. min.
Operation Time incl. Bounce Measured w/ 100 % overdrive Release Time Capacitance Environmental Data Shock Resistance Vibration Resistance Ambient Temperature Ambient Temperature Stock Temperature Soldering Temperature 1/2 sinus wave duration 11 ms From 10 - 2000 Hz M 10C/ minute max. allowable P 10C/ minute max. allowable 10C/ minute max. allowable 5 sec. -30 -20 -40 Measured w/ no coil suppression at 10 kHz cross contact 0.2
0.5 0.1 0.7
2.0 0.1
0.7 1.5
ms ms pF
50 20 150** 85 160 260 -30 -20 -40
50 20 150 85 160 260 -20 -35
50 20
g g
o
C C C C
85 85 260
o
o
o
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.meder.com
230
Europe # ++49-(0)7733-94870, USA # 800-870-5385

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