MICRO SWITCH Key Actuated Safety Switches
GKM Series
004750
Issue 5
Datasheet
FEATURES
• Red switch body for easy safety recognition
• Common 22 mm mounting centers which accept
M4 or #8 mounting hardware
• Prewired cable or M12 connector for electrical termination
• Positive opening action of normally closed contacts
to EN/IEC 60947-5-1-3 specification
• Switch chamber IP67 environmentally sealed for indoor or
outdoor applications
• CE and UL certifications
• Designed and agency evaluated for safety functions up to
and including a SIL3 level
DESCRIPTION
When the application requires a miniature key-operated safety
interlocking limit switch for machine guarding, Honeywell
provides the GKM Series. The compact housing size of 34
mm L x 16 mm W x 70 mm H is optimal where there is limited
space available on machinery. The double-insulated plastic
housing and rugged stainless steel actuator key are better
suited for demanding environments. The unique design of
the switch allows the actuator key to be inserted from the
top or the side. The switch can be mounted from the front or
back as required. As with the Honeywell safety limit switches,
all normally closed contacts are positive opening
. Direct
mechanical linkage within the switch force the normally
closed contacts open when the actuator key is removed from
the switch, opening the circuit. The switches are available
with either a cable connection or an integral four-pin M12
connector.
Sensing and Internet of Things
POTENTIAL APPLICATIONS
• Safety interlock for small doors and apertures on machinery
• Safety interlock for multiple doors on machinery with daisy
chain option (twin connectors)
DIFFERENTIATION
• Miniature package size of 34 mm L x 16 mm W x 70 mm H
• Switch design with dual entry (side or top) for actuator key
• Daisy-chain capability for monitoring multiple gates on
machinery
• Rigid or flexible stainless steel actuator keys
PORTFOLIO
In addition to the GKM Series safety interlocking limit switches,
Honeywell offers other safety interlocking limit switches. These
include the EN50047 plastic body GKE Series, plastic body
GKN Series, EN50041 metal body GKB Series, and metal body
solenoid (trapped key) GKL/R Series. Non-interlocking safety
limit switches include the GSS Series, FF Series non-contact
switches, and the 1CPS Series and 2CPS Series cable/rope pull
safety limit switches.
Key-Actuated Safety Switches, GKM Series
Table 1. Performance Specifications
Characteristic
Parameter
Description
Housing material
Dual entry key-operated safety interlock switch
CE, DOC 141 (EN60947-1 and EN 60947-5-1)
cULus, UL508 (File E37138)
SIRA, Functional Safety Certificate (IEC 61508-2:2010)
Red glass-filled polyester body, black glass-filled polyamide actuator housing
Actuator key material
Stainless steel
Agency certifications
Electrical connection
Contact/switch options¹
Contact design
Contact material
Electrical ratings
Utilization category
Rated operational
voltage (Ue)
Rated operational
current (Ie)
Thermal current (Ith)
Rated insulation (Ui)
Rated impulse withstand
voltage (Uimp)
Short circuit protection
device (SCPD)
Side or bottom exit cable (UL rated 105 °C with PVC jacket and cores four conductor 0.5 mm², 20 AWG).
Side or bottom exit integral M12 Micro 4-pin dc-style connector,
Side and bottom exit (twin connectors) integral M12 Micro 4-pin dc style connectors for daisy chaining and monitoring multiple doors
1NC/1NO slow action BBM, 2NC slow action
Double break, electrically separated (Zb)
Silver alloy (standard), gold-plated (low energy applications)
See Table 2
AC-15, B300; DC-13, Q300
240 Vac, 250 Vdc
1.5 A, 0.27 A
5 A, GKME Series 2 A
500 V
2500 V
Class RK5 fuse, rated at 4.5A
Pollution degree
3
Environmental sealing
Operating temperature
Shock
Vibration
MCTF (Mechanical life)
MCTF (Electrical life)
IP 66/67, GKME Series (twin connectors) IP66 per EN60529; NEMA 1, 12, 13
-25 °C to 85 °C (-13 °F to 185 °F)
50 G per IEC 60068-2-27
10 G per IEC 60068-2-6
>1,000,000 cycles with single-sided confidence limit of 95%
32,000 cycles
SIL Capability²
SIL3 capable with HFT=1, SIL2 capable with HFT=0 with reference to IEC 61508-2:2010 Functional Safety
Proof test interval
1 year
¹All normally closed contacts are positive opening
²HFT (Hardware Fault Tolerance).
Table 2. Electrial Ratings
Electrical Ratings for Body Style A, B, C, D
Electrical Ratings for Body Style E (Twin Conn.)
Standard Silver Contacts
Gold Plate Contacts
Standard Silver Contacts
Gold Plate Contacts
AC
Ith = 5 A
1 V, 10 mA min.
50 V, 100 mA max.
30 Vdc, 2 A max.
Ith = 2 A
1 Vdc, 10 mA min.
30 Vdc, 100 mA max.
Ith = 2 A
DC
B300
AC15
Q300
DC13
Ue
Ie
Ue
Ie
Volts
Amps
Volts
Amps
120
3
125
0.55
240
1.5
250
0.27
2 sensing.honeywell.com
Key-Actuated Safety Switches, GKM Series
Figure 1. Product Nomenclature
GKM
D
0
3
Switch Type
Body
Style
Electrical
Termination
Circuitry
GKM Series
Dual-Entry,
KeyOperated
Safety
Switch
A
Side exit cable
0
M12 micro
connector,
4-pin male
6
2NC,
slow action
3
Keys1
1NC/1NO, BBM
slow action
B
Bottom exit
cable
1
1 m,
four conductor
cable
C
Side exit
connector
2
2 m,
four conductor
cable
7
2NC,
gold contacts
slow action
D
Bottom exit
connector
3
3 m,
four conductor
cable
9
1NC/1NO, BBM
gold contacts
slow action
E
Twin
connectors
Listing
Key style
GKZ51M
GKZ52M
GKZ53M
GKZ54M
GKZ55M
Straight
90°
Side/side adjustable
Up/down adjustable
Multi-directional
A key actuator (ordered separately) is
required for each switch.
1
NOTE: not all combinations of model code are available.
Please contact your Honeywell provider/representative for assistance.
Figure 2. Wiring
CIRCUIT DIAGRAMS2
TWIN CONNECTORS
CIRCUIT TYPES 3 & 9
CIRCUIT TYPES 6 & 7
3
3
4
2
2
1
1
3
2
4
1
4
3 2
M12 MALE
CONNECTOR 3
PIN-OUTS
1 4
CABLE/LEADWIRE OR CONNECTOR
CIRCUIT TYPES 3 & 9
CIRCUIT TYPES 6 & 7
BLUE 3
WHITE 2
2
1 BROWN
4 BLACK
BLUE 3
WHITE 2
2
1
4
1 BROWN
4 BLACK
Refer to circuitry in Figure 1 (Product nomenclature).
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Key-Actuated Safety Switches, GKM Series
Figure 3. Product Dimensions • Body Style B
CL
of key
slot
CL
of key
slot
90° - KEY
SHOWN IN OPTIONAL
ACTUATING POSITIONS
16
[0.63]
max.
17,55
[0.691]
12,5
[0.492]
CL
of key
slot
22,0
[0.866]
33
[1.30]
ref
32
[1.26]
max.
Disconnect force
20 N [4.5 lb-f] max.
Force
disconnect
position
10,2
[0.402]
0,5
[0.020]
3,8
[0.148]
BODY STYLE A
29,5
[1.16]
33 REF
[1.30]
14,5
[0.57]
M12 x 1 THD
Fit to
unused
entry.
4 sensing.honeywell.com
Keyway
37,4
[1.47]
Ø16
[0.63]
max.
14,5
[0.57]
3,8
[0.15]
M12 x 1 THD
cover
Figure 4.Slot
Slotdust
Dust
Cover
BODY STYLE E
BODY STYLE D
29,5
[1.16]
Recommended
key-in position
VIEWS SHOWING OPTIONAL
KEY POSITIONS
2 x mounting holes for
M4 / #8 screws
C'bored both sides
Ø9,3 x 4,5 deep
[0.366] x [0.177]
fitted with brass
mounting bushes
BODY STYLE C
0,5
[0.020]
36,0
[1.42]
CL
of key
slot
37,4
[1.47]
34
[1.34]
max.
3,80
[0.148]
Force
disconnect
position
1,25
[0.049]
14,5
[0.57]
Ø16
[0.63]
Keyway
14,5
[0.57]
Ø16
[0.63]
max.
Key-Actuated Safety Switches, GKM Series
Figure 5. Key Dimensions, continued
GKZ51M
GKZ52M
45
[1.77]
2,5
[0.098]
12,8
[0.504]
GKZ53M
2 X holes for M4
or #8 screws with
45° x 2,2 [0.083] deep
24 [0.945]
max.
3,5 [0.138]
14
[0.55]
max.
21,3
[0.839]
20,0
[0.79]
22,0
[0.866]
15
[0.59]
6,4 [0.252]
min.
2 holes for M4
or #8 screws
50,0 [1.97]
40,0 [1.57]
22,0
[0.866]
2,6
[0.102]
24
[0.945]
max.
Ø 5,5 [Ø 0.22]
13,2
[0.519]
2,5 [0.10]
12,8
[0.50]
32
[1.26]
max.
2,0 [0.08]
90°±2°
19,0
[0.75]
GKZ52M - 90° KEY
GKZ51M - STRAIGHT KEY
GKZ54M
GKZ55M
56,0 [2.20]
40,0 [1.57]
50,0 [1.97]
40,0 [1.57]
20,0
[0.79]
26,0 19,0
[1.02] [0.75]
28,0
[1.10]
Ø 5,5 [0.22]
2,5
[0.10]
12,8
[0.50]
19,0
[0.75]
2,0
[0.08]
Ø 5,5 [0.22]
12,8
[0.50]
2,5
[0.10]
12,0
[0.47]
4,0
[0.16]
Table 3. Minimum Actuating Radius
Catalog Listing, Description
Key opening of switch (vertical) min.
radius
Key opening of switch (horizontal)
min. radius
GKZ51M, Straight key
225 mm [8.9 in]
160 mm [6.3 in]
GKZ52M, 90° key (right angle)
225 mm [8.9 in]
160 mm [6.3 in]
GKZ53M, Adjustable key (side-side)
32 mm [1.26 in]
160 mm [6.3 in]
GKZ54M, Adjustable key (up-down)
225 mm [8.9 in]
45 mm [1.77 in]
GKZ55M, Multi-directional key
18° max. all directions
18° max. all directions
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Key-Actuated Safety Switches, GKM Series
Table 4. Order Guide
Catalog
Listing1
Body Style
Contacts
Contact
Material
Electrical Connection
GKMA13
Side exit cable
1NC/1NO slow action, BBM
Silver
1 meter cable
GKMA19
Side exit cable
1NC/1NO slow action, BBM
Gold plated
1 meter cable
GKMA23
Side exit cable
1NC/1NO slow action, BBM
Silver
2 meter cable
GKMA33
Side exit cable
1NC/1NO slow action, BBM
Silver
3 meter cable
GKMA16
Side exit cable
2NC slow action
Silver
1 meter cable
GKMA36
Side exit cable
2NC slow action
Silver
3 meter cable
GKMB13
Bottom exit cable
1NC/1NO slow action, BBM
Silver
1 meter cable
GKMB19
Bottom exit cable
1NC/1NO slow action, BBM
Gold plated
1 meter cable
GKMB23
Bottom exit cable
1NC/1NO slow action, BBM
Silver
2 meter cable
GKMB33
Bottom exit cable
1NC/1NO slow action, BBM
Silver
3 meter cable
GKMB39
Bottom exit cable
1NC/1NO slow action, BBM
Gold plated
3 meter cable
GKMB16
Bottom exit cable
2NC slow action
Silver
1 meter cable
GKMB17
Bottom exit cable
2NC slow action
Gold plated
1 meter cable
GKMB36
Bottom exit cable
2NC slow action
Silver
3 meter cable
GKMB37
Bottom exit cable
2NC slow action
Gold plated
3 meter cable
GKMB56
Bottom exit cable
2NC slow action
Silver
5 meter cable
GKMC03
Side exit connector
1NC/1NO slow action, BBM
Silver
M12 Micro connector, 4-pin male
GKMC09
Side exit connector
1NC/1NO slow action, BBM
Gold plated
M12 Micro connector, 4-pin male
GKMC06
Side exit connector
2NC slow action
Silver
M12 Micro connector, 4-pin male
GKMC07
Side exit connector
2NC slow action
Gold plated
M12 Micro connector, 4-pin male
GKMD03
Bottom exit
connector
1NC/1NO slow action, BBM
Silver
M12 Micro connector, 4-pin male
GKMD09
Bottom exit
connector
1NC/1NO slow action, BBM
Gold plated
M12 Micro connector, 4-pin male
GKMD06
Bottom exit
connector
2NC slow action
Silver
M12 Micro connector, 4-pin male
GKMD07
Bottom exit
connector
2NC slow action
Gold plated
M12 Micro connector, 4-pin male
GKME03
Bottom & side exit
connector
1NC/1NO slow action, BBM
Silver
Twin M12 Micro connectors,
4-pin male
GKME09
Bottom & side exit
connector
1NC/1NO slow action, BBM
Gold plated
Twin M12 Micro connectors,
4-pin male
GKME06
Bottom & side exit
connector
2NC slow action
Silver
Twin M12 Micro connectors,
4-pin male
GKME07
Bottom & side exit
connector
2NC slow action
Gold plated
Twin M12 Micro connectors,
4-pin male
An actuator key (ordered separately) is required for each switch. Select actuator key by reviewing product nomenclature tree and dimensional
diagrams on page 5.
1
6 sensing.honeywell.com
m WARNING
ADDITIONAL MATERIALS
The following associated literature is available on the Honeywell
web site at sensing.honeywell.com:
• Product installation instructions
• Product range guide
IMPROPER INSTALLATION
•
•
Consult with local safety agencies and their requirements
when designing a machine-control link, interface and all
control elements that affect safety.
Strictly adhere to all installation instructions.
Failure to comply with these instructions could result in
death or serious injury.
m WARNING
MISUSE OF DOCUMENTATION
•
•
The information presented in this product sheet is for
reference only. Do not use this document as a product
installation guide.
Complete installation, operation, and maintenance
information is provided in the instructions supplied with
each product.
Failure to comply with these instructions could result in
death or serious injury.
Warranty/Remedy
Find out more
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through a worldwide network
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and distributors. For application assistance, current specifications, or pricing contact your
local sales office.
To learn more about Honeywell’s products,
Honeywell warrants goods of its manufacture as being free of
defective materials and faulty workmanship during the applicable warranty period. Honeywell’s standard product warranty
applies unless agreed to otherwise by Honeywell in writing;
please refer to your order acknowledgment or consult your
local sales office for specific warranty details. If warranted
goods are returned to Honeywell during the period of coverage,
Honeywell will repair or replace, at its option, without charge
those items that Honeywell, in its sole discretion, finds defective. The foregoing is buyer’s sole remedy and is in lieu of all
other warranties, expressed or implied, including those of
merchantability and fitness for a particular purpose. In no
event shall Honeywell be liable for consequential, special,
or indirect damages.
While Honeywell may provide application assistance personally,
through our literature and the Honeywell web site, it is buyer’s
sole responsibility to determine the suitability of the product in
the application.
Specifications may change without notice. The information we
supply is believed to be accurate and reliable as of this writing.
However, Honeywell assumes no responsibility for its use.
call +1-815-235-6847 or
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visit sensing.honeywell.com,
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July 2017
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