1. “KB” - “KM” SERIES LIMIT SWITCHES

2. “KB” - “KM” SERIES LIMIT SWITCHES
FACTS
The LIMIT SWITCH is an electromechanical device, which can interact with the ambient by sensing an external movement and transforming it into an electric signal that can then be handled by an appropriate control system.
It can be used to detect the position of mobile equipment and for safety applications.
M22 GB

3. “KB” - “KM” SERIES LIMIT SWITCHES
FACTS
Three fundamental parts compose the LIMIT SWITCH:
Head
Operating head
Body (housing or container)
Contact block
Contact block
Body
M22 GB

4. “KB” - “KM” SERIES LIMIT SWITCHES
LOVATO Electric has innovated the range of limit by designing the new K series with dimensions per EN50047:
KB series with plastic body
KM series with metal body
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5. “KB” - “KM” SERIES LIMIT SWITCHES POSITION DETECTION VERSION
SAFETY VERSION
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6. “KB” - “KM” SERIES LIMIT SWITCHES
AVAILABLE RANGE
19 operating heads
Plastic Model
Metal Model
Incorporated auxiliary contacts
Incorporated auxiliary contacts
SPARE PARTS
9 types of contact blocks
2 auxiliary contacts
3 auxiliary contacts
M22 GB

7. “KB” - “KM” SERIES LIMIT SWITCHES
MODULARITY
PLASTIC AND METAL BODY
KB plastic series
KM metal series
Product body made of double insulated, self-extinguishing thermoplastic polymer
Product body made of
Aluminium-zinc alloy (zama)
M22 GB

8. “KB” - “KM” SERIES LIMIT SWITCHES
MODULARITY
19 operating heads (metal) that are interchangeable and complementary
M22 GB

9. “KB” - “KM” SERIES LIMIT SWITCHES
MODULARITY
INTERCHANGEABLE AND REMOVABLE AUXILIARY CONTACTS
1NO+1NC
2NC
2NO
Snap action
Slow break
(make before break)
1NO+2NC
2NO+1NC
3NC
Slow break
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10. “KB” - “KM” SERIES LIMIT SWITCHES
ADVANTAGES
SIMPLE ASSEMBLY
Traditional switch
Operating head fixing by bayonet insert mechanism.
4 screws
Internal components can pop out of their place
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11. “KB” - “KM” SERIES LIMIT SWITCHES
ADVANTAGES
SIMPLE ADJUSTMENT
Traditional switch
45°
45°
45°
Operating head can be adjusted at
90° angles.
M22 GB

12. “KB” - “KM” SERIES LIMIT SWITCHES
ADVANTAGES
SIMPLE ADJUSTMENT
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13. “KB” - “KM” SERIES LIMIT SWITCHES
ADVANTAGES
VERY SIMPLE WIRING
Cover fixed by only
one captive screw
and hinged on the
bottom by quick
removal
Traditional switch
Removable auxiliary
contact block for
quick and easy
wiring
Direct cable entry in
lower contacts
Cable entry in lower
contacts is indirect so
the user must bend
cables.
Terminal screw
supplied open
Captive cover screw.
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14. “KB” - “KM” SERIES LIMIT SWITCHES EXTREMELY SIMPLE WIRING
ADVANTAGES
EXTREMELY SIMPLE WIRING
Traditional switch
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15. “KB” - “KM” SERIES LIMIT SWITCHES
ADVANTAGES
CABLE ENTRY COMPLIANT WITH RECENT INTERNATIONAL STANDARDS
Body with M20 cable
entry (PG13.5 cable
entry on request).
PG13.5 cable entry
invalidated by recent
standards
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16. “KB” - “KM” SERIES LIMIT SWITCHES
SUMMARY
Total modularity (better stock management)
Simple to install and adjust
Maximum cabling ease
Robust external parts (metal operators)
Better safety with the new blocks with 3 auxiliary
contacts
Comply with recent standards REQUIREMENTS
(M20 cable entry).
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17. “KB” - “KM” SERIES LIMIT SWITCHES
TECHNICAL FEATURES
Operating heads: Aluminium-zinc alloy (zama)
KB: Self-extinguishing double-insulated polymer
thermoplastic body housing
KM: Aluminium-zinc alloy (zama) body housing
Body degree of protection: IP65
Terminal degree of protection: IP20
Cable connection: Self-releasing screw terminal
Rated thermal current Ith: 10A
IEC/EN contact designation: A600 Q600
Rated insulation voltage Ui: 690VAC
Rated impulse withstand voltage Uimp: 6kV
Cable entry: M20
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18. “KB” - “KM” SERIES LIMIT SWITCHES CERTIFICATIONS - COMPLIANCE
COMPLIANT WITH:
EN50047
IEC/EN
IEC/EN
EN81-1
EN1088
CERTIFICATIONS OBTAINED:
cULus (USA and CANADA) KB… series.
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19. “KB” - “KM” SERIES LIMIT SWITCHES
APPLICATION EXAMPLES
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20. “KB” - “KM” SERIES LIMIT SWITCHES
APPLICATION EXAMPLES
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21. “KB” - “KM” SERIES LIMIT SWITCHES
APPLICATIONS
Elevators and lifts
Mobile protections for machinery
Assembly lines
Wood-working machines
Food processing machines
Leather-working and shoe-making machines
Band saws
Packaging and packing machines
Filling and bottling machines
Labelling machines
Automated storage …
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22. Interpretation of the complete switch order codes
STOCK MANAGEMENT
Interpretation of the complete switch order codes
Example: K B A 1 S 1 1
Limit switch, K series, EN standard
Type of body
B = Plastic housing
M = Metal housing
A1 = Top push rod plunger
B1 = Plastic top roller push plunger
B2 = Metal top roller push plunger
C1 = Plastic roller centre push lever
C2 = Metal roller centre push lever
D1 = Plastic roller side push lever
and so on
Type of contact
S = Snap action
L = Slow-break action
Contact numbering
11 = 1NO+1NC
02 = 2NC
20 = 2NO
12 = 1NO+2NC
21 = 2NO+1NC
03 = 3NC
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23. Body complete with auxiliary contacts only
STOCK MANAGEMENT
Body complete with auxiliary contacts only
Example: K X C B S 1 1
Limit switch, K series, EN standard
X = Accessorial identification
Type of body
CB = Plastic housing
CM = metal housing
Type of contact
S = Snap action
L = Slow-break action
Contact numbering
11 = 1NO+1NC
02 = 2NC
20 = 2NO
12 = 1NO+2NC
21 = 2NO+1NC
03 = 3NC
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24. Limit switch. K series, EN 50047 standard
STOCK MANAGEMENT
Operating heads
Example: K X A A 1
Limit switch. K series, EN standard
X = Accessorial identification
A= Operator
Type of operator
A1 = Top push rod plunger
B1 = Plastic top roller push plunger
B2 = Metal top roller push plunger
C1 = Plastic roller centre push lever
C2 = Metal roller centre push lever
D1 = Plastic roller side push lever
and so on
M22 GB

25. Thank you and goodbye