290
www.meder.com
MEDER electronic
Push-button based on
reed switch
DESCRIPTION
The MK25 is a push-button based on reed
technology, which is used in different applications.
With his contactless switching and the EX approval
it’s the safest way for switching in explosive
environments. The simply mounting does take
place with a standard drilling (see drilling template)
in a steel plate up to 4mm. The button plates are
available in the colors black, red, blue, yellow and
green. There are sufcient combination possibilities
for your application.
APPLICATIONS
Industrial appliance
Machinery mode switch
Tank systems
Applications with a difcult environments
•
•
•
•
FEATURES
Contact 1 form A
Contactless switching
Switching zone is hermetically sealed
EX approval conrm to EU directives 94/9/EC
Operating temperature of –40 to +60°C
Simple mounting
Button plates in different colors available (The
protection caps with different colors must be
ordered separately.)
•
•
•
•
•
•
•
MK25 Series
DIMENSIONS
All dimensions in mm, unspecied tolerances +/- 0.1 mm
Sheet 1.0-4.0 mm
37.00
100...5000
40.00
YM/P
FA xxxxxxx
10.70
Date code acc. to EN 60062
Marking
29.70
7±1
50 ± 5
-0.0
22.3 +0.4
24.1 -0.0
+0.4
3.2
Drilling Template
291
www.meder.com
MEDER electronic
Push-button based on reed
switch
MK25 Series
ORDER INFORMATION
TERMINATION
Series Contact
Form
Switch
Model
Cable Length
(mm) Termination
MK25 - xx xx xxx x
Options 1 Form A 46
5000* W75
1 Form C 90
* Other cable lengths from 100 to 5000 mm available.
Part Number Example
MK25 - 1A46 - 5000 W
1A is the contact form
46 is the switch model
500 is the cable length (mm)
W is the termination
For wire and termination details please contact factory.
W
The cable cut length includes:
5mm of wire stripped and tinned.
292
www.meder.com
MEDER electronic
Push-button based
on reed switch
MK25 Series
CONTACT DATA
All Data at 20° C Switch Model →
Contact Form →
Switch 1A
46
Switch 1A
75
Switch 1C
90
Contact Ratings Conditions Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Unit
Switching Power
Any DC combination of V & A
not to exceed their individual
max.‘s
10 10 20 W
Switching Voltage DC or peak AC 100 1000 175 V
Switching Current DC or peak AC 0.5 0.5 0.5 A
Carry Current DC or peak AC 1.5 1.0 1.0 A
Static Contact Resistance
(initial) Measured with 40% overdrive 150 200 150 mΩ
Insulation Resistance RH 45% 1091010 200 109250 Ω
Breakdown Voltage 225 1500 200 VDC
Operate Time incl. Bounce Measured w/ 40 % overdrive 0.7 0.5 0.7 ms
Release Time Measured w/ no coil
suppression 0.1 0.1 1.5 ms
Capacitance Across contact to coil 0.2 0.4 pF
Environmental Data
Shock Resistance 1/2 sinus wave duration 11 ms 50 50 50 g
Vibration Resistance From 10 - 2000 Hz 35 20 20 g
Ambient Temperature 10°C/ minute max. allowable -30 60 -20 150 -20 85 oC
Storage Temperature 10°C/ minute max. allowable -40 60 -40 85 -35 85 oC
Material Case PA 6, black