Contact elements for emergency stop buttons

Contact elements for emergency stop buttons

Technical specification

  • Preassembled contact elements
  • Positively driven safety contacts for switching the emergency-stop function
  • Signal contact (N.O. contact) for external diagnosis, e.g. display on the machine control unit
  • Failure protection module checks permanent connection of push button and contact element
  • Illumination module for push buttons, with LED illumination integrated in the snti-obstruction protective collar

Matching contact element for every emergency-stop application: The various functions are combined into the contact elements. The functions can be assigned to the corresponding module which is identifiable by its colour.

Technical drawing

Image 1/10: KE contact element with 1 N.C. contact
Image 1/10: KE contact element with 1 N.C. contact
Full screen
Image 2/10: KE contact element with 2 N.C. contacts
Image 2/10: KE contact element with 2 N.C. contacts
Full screen
Image 3/10: KE contact element with 2 N.C. contacts / failure protection
Image 3/10: KE contact element with 2 N.C. contacts / failure protection
Full screen
Image 4/10: KE contact element with 2 N.C. contacts / failure protection / illumination
Image 4/10: KE contact element with 2 N.C. contacts / failure protection / illumination
Full screen
Image 5/10: KE contact element with 2 N.C. contacts / 1 N.O. contact
Image 5/10: KE contact element with 2 N.C. contacts / 1 N.O. contact
Full screen
Image 6/10: KE contact element with 2 N.C. contacts / 1 N.O. contact / failure protection
Image 6/10: KE contact element with 2 N.C. contacts / 1 N.O. contact / failure protection
Full screen
Image 7/10: KE contact element with 2 N.C. contacts / 1 N.O. contact / failure protection / illumination
Image 7/10: KE contact element with 2 N.C. contacts / 1 N.O. contact / failure protection / illumination
Full screen
Image 8/10: KE contact element with 3 N.C. contacts / failure protection
Image 8/10: KE contact element with 3 N.C. contacts / failure protection
Full screen
Image 9/10: KE contact element with 3 N.C. contacts / 1 N.O. contact
Image 9/10: KE contact element with 3 N.C. contacts / 1 N.O. contact
Full screen
Image 10/10: KE contact element with 4 N.C. contacts
Image 10/10: KE contact element with 4 N.C. contacts
Full screen

Article characteristics

  • Attribute
  • KE10
  • KE20
  • KE20SF
  • KE20SFB
  • KE21
  • KE21SF
  • KE21SFB
  • KE30SF
  • KE31
  • KE40
  • Attribute
  • Min. switching voltage
  • Min. switching voltage
  • Min. switching current
  • Conv. thermal continuous current Ith
  • Bounce time
  • Utilization category
  • Rated operating current (Ie)
  • Rated operating voltage (Ue)
  • Rated insulation voltage (Ui)
  • Rated voltage Ue
  • Rated current Ie (ohmic load)
  • Rated current Ie (inductive load)
  • Protection class
  • Operating voltage max.
  • Operating voltage max.
  • LED service life
  • Service life, electrical at nominal load (Cycles)
  • Illumination
  • Number of safety contacts (positively opening)
  • Number of signalling contacts (N.O.)
  • Failure protection
  • Actuation path
  • Max. switching current
  • Max. contact resistance
  • Operating voltage min.
  • Operating voltage min.
  • Max. switching voltage
  • Max. switching voltage
Attribute KE10 KE20 KE20SF KE20SFB KE21 KE21SF KE21SFB KE30SF KE31 KE40
Bestellung
Min. switching voltage 5 V DC 12 V DC 5 V DC 12 V DC 5 V DC
Min. switching voltage 5 V AC 12 V AC 5 V AC 12 V AC 5 V AC
Min. switching current 0.01 A 0.01 A
Conv. thermal continuous current Ith 16 A 16 A
Bounce time 10 ms 10 ms
Utilization category AC15 A600 / DC13 Q600 AC15 A600 / DC13 Q600
Rated operating current (Ie) 3000 / 1600 ; 120 / 200 / 400 / 2000 mA 3000 / 1600 ; 120 / 200 / 400 / 2000 mA 3000 / 1600 120 / 200 / 400 / 2000 mA 3000 / 1600 ; 120 / 200 / 400 / 2000 mA
Rated operating voltage (Ue) 240 / 440 ; 440 / 250 / 125 / 60 / 24 V 240 / 440 ; 440 / 250 / 125 / 60 / 24 V 240 / 440 440 / 250 / 125 / 60 / 24 V 240 / 440 ; 440 / 250 / 125 / 60 / 24 V
Rated insulation voltage (Ui) 600 V 600 V
Rated voltage Ue 250 VAC / 440 VAC 250 VAC / 440 VAC
Rated current Ie (ohmic load) 16 A / 10 A 16 A / 10 A
Rated current Ie (inductive load) 10 A / 6 A 10 A / 6 A
Protection class II II III II
Operating voltage max. 30 V DC 30 V DC
Operating voltage max. 30 V AC 30 V AC
LED service life 100000 (T=25°C, I=20mA)70000 (T=55°C, I=20mA) h 100000 (T=25°C, I=20mA)70000 (T=55°C, I=20mA) h
Service life, electrical at nominal load (Cycles) 1000000 1000000
Illumination No Yes No Yes No
Number of safety contacts (positively opening) 1 2 2 3 4
Number of signalling contacts (N.O.) 0 1 0 1 0
Failure protection no yes no yes no
Actuation path 6 mm 6 mm
Max. switching current 0.04 A 0.04 A
Max. contact resistance 0.02 Ohm 0.02 Ohm
Operating voltage min. 12 V DC 12 V DC
Operating voltage min. 12 V AC 12 V AC
Max. switching voltage 30 V DC 30 V DC
Max. switching voltage 30 V AC 30 V AC
  • Attribute
  • KE10
  • KE20
  • KE20SF
  • KE20SFB
  • KE21
  • KE21SF
  • KE21SFB
  • KE30SF
  • KE31
  • KE40
  • Attribute
  • Service life, mechanical (Cycles)
  • Dimensions
  • Positive opening path
Attribute KE10 KE20 KE20SF KE20SFB KE21 KE21SF KE21SFB KE30SF KE31 KE40
Bestellung
Service life, mechanical (Cycles) 1 x 10^6 1 x 10^6
Dimensions 43,6 x 50,8 x 27,3 mm (H/B/T) 43,6 x 50,8 x 45,4 mm (H/B/T) 43,6 x 50,8 x 27,3 mm (H/B/T) 43,6 x 50,8 x 45,4 mm (H/B/T)
Positive opening path 3 mm 3 mm
  • Attribute
  • KE10
  • KE20
  • KE20SF
  • KE20SFB
  • KE21
  • KE21SF
  • KE21SFB
  • KE30SF
  • KE31
  • KE40
  • Attribute
  • Contact material
Attribute KE10 KE20 KE20SF KE20SFB KE21 KE21SF KE21SFB KE30SF KE31 KE40
Bestellung
Contact material AgNi AgNi
  • Attribute
  • KE10
  • KE20
  • KE20SF
  • KE20SFB
  • KE21
  • KE21SF
  • KE21SFB
  • KE30SF
  • KE31
  • KE40
  • Attribute
  • Operating temperature min.
  • Max. operating temperature
  • Min. storage temperature
  • Max. storage temperature
Attribute KE10 KE20 KE20SF KE20SFB KE21 KE21SF KE21SFB KE30SF KE31 KE40
Bestellung
Operating temperature min. -30 °C -30 °C
Max. operating temperature 85 °C 65 °C 85 °C 65 °C 85 °C
Min. storage temperature -50 °C -50 °C
Max. storage temperature 85 °C 85 °C
  • Attribute
  • KE10
  • KE20
  • KE20SF
  • KE20SFB
  • KE21
  • KE21SF
  • KE21SFB
  • KE30SF
  • KE31
  • KE40
  • Attribute
  • Mounting type
  • Installation
Attribute KE10 KE20 KE20SF KE20SFB KE21 KE21SF KE21SFB KE30SF KE31 KE40
Bestellung
Mounting type inserted/latched inserted/latched
Installation from below from below
  • Attribute
  • KE10
  • KE20
  • KE20SF
  • KE20SFB
  • KE21
  • KE21SF
  • KE21SFB
  • KE30SF
  • KE31
  • KE40
  • Attribute
  • Connection type
  • Screw terminals
  • Max. connection cross section
  • Wire cross section
Attribute KE10 KE20 KE20SF KE20SFB KE21 KE21SF KE21SFB KE30SF KE31 KE40
Bestellung
Connection type 10cm Litze und Stecker für Beleuchtung 10cm Litze und Stecker für Beleuchtung
Screw terminals yes yes
Max. connection cross section 2.5 mm^2 2.5 mm^2
Wire cross section 0.25 mm^2 0.25 mm^2
  • Attribute
  • KE10
  • KE20
  • KE20SF
  • KE20SFB
  • KE21
  • KE21SF
  • KE21SFB
  • KE30SF
  • KE31
  • KE40
  • Attribute
  • Certified in accordance with
  • CE label
Attribute KE10 KE20 KE20SF KE20SFB KE21 KE21SF KE21SFB KE30SF KE31 KE40
Bestellung
Certified in accordance with EN 60947-5-5 EN 60947-5-1 EN ISO 13850 UL 508 / CSA 22.2 EN 60947-5-5 EN 60947-5-1 EN ISO 13850 UL 508 / CSA 22.2
CE label yes yes

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