MICRO SWITCH Key Actuated Safety Switches
GKN Series
004740
Datasheet
Issue 3
FEATURES
•
•
•
•
•
•
•
•
Red switch body for easy safety recognition
Four different styles of stainless steel actuator keys
Three conduits with 0.5-14 NPT or M20 thread connection
Positive opening action of normally closed contacts
to EN/IEC 60947-5-1-3 specification
Three contacts; 2NC/1NO or 3NC
Switch chamber environmentally sealed to IP67 and
NEMA 1, 4X (indoor), 12, and 13
CCC, CE, and UL certifications
Designed and agency evaluated for safety functions up to
and including a SIL3 level
DESCRIPTION
The GKN Series key-actuated safety interlocking limit switches
are designed for applications where machine guarding is
required. Up to 3 normally closed contacts are available per
switch to meet most control circuit applications. 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. When
the actuator key is re-inserted into the switch, the contacts
change state. The double-insulated plastic housing and
stainless steel actuator-key are designed for demanding
environments with the internal switch enclosure being
environmentally sealed. The design of the switch allows 4
actuator-key entry locations for installation flexibility. Three
conduits are integral to each switch for convenience of
electrical connections.
POTENTIAL APPLICATIONS
• Safety interlock for guards or doors on equipment and
machinery
• Designed for hinge or sliding guards or doors
DIFFERENTIATION
• Up to three NC contacts for control, signaling, or contact
redundancy
• Four actuator key entry positions
• Optional flexible key for small door radius
• Optional funnel key where door misalignment may occur
PORTFOLIO
In addition to the GKN Series safety interlocking limit switches,
Honeywell offers other safety interlocking limit switches. These
include the miniature plastic body GKM series, EN50047
plastic body GKE Series, EN50041 metal body GKB Series,
and metal body solenoid (trapped key) GKL/R Series. Non-
interlocking safety limit switches include the GSS Series, non-
contact FF Series, and 1CPS Series and 2CPS Series cable/
rope pull safety limit switches.
VALUE TO CUSTOMERS
• Common mounting footprint for ease of installation
• Double insulated housing, no ground required
• Large wiring cavity with three conduit entries
Sensing and Internet of Things
Key-Actuated Safety Switches, GKN Series
Table 1. Performance Specifications
Characteristic
Description
Agency certifications
Housing material
Actuator key material
Electrical connection
Contact/switch options¹
Contact type
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)
Pollution degree
Environmental sealing
Operating temperature
Shock
Vibration
MCTF (Mechanical life)
MCTF (Electrical life)
SIL Capability²
Proof test interval
Parameter
Multi-entry, key-operated safety switch
cULus, CE, CCC
Glass-filled nylon
Stainless steel
Three conduits, 20 mm or 0.5-14 NPT
3NC or 2NC/1NO
Slow action break-before-make (BBM), or slow action
Double break, electrically separated (Zb)
Silver alloy
See table 2 below
AC-15, A600; DC-13, Q300
120 Vac, 240 Vac, 600 Vac; 125 Vdc, 250 Vdc
6 A, 3 A, 1.2 A; 0.55 A, 0.27 A
10 A
600 V
2500 V
Class J fuse (10 A/600 V)
2 (micro-environment, inside enclosure)
3 (macro-environment, installation environment)
IP67, NEMA 1, 4X (indoor), 12, and 13
-25 °C to 70 °C [-13 °F to 158 °F]
50 G per IEC 60068-2-27
10 G per IEC 60068-2-6
>1,000,000 cycles with single-sided confidence of 100%
>25,000 cycles with single-sided confidence of 75%
SIL 2 capable with HFT³ = 0; SIL 3 capable with HFT³ =1
1 year
.
¹All normally closed contacts are positive opening
²Safety Integrity Level
3
HFT (Hardware Fault Tolerance)
Table 2. Electrial Ratings
AC
A600
Ue
Volts
120
240
600
AC15
Ie
Amps
6
3
1.2
DC
Q300
Ue
Volts
125
250
–
DC13
Ie
Amps
0.55
0.27
–
2
sensing.honeywell.com
Key-Actuated Safety Switches, GKN Series
Figure 1. Product Nomenclature
GKN
Switch Type
C
Conduit
30
Circuitry
Keys
1
GKZ41
GKZ42
GKZ45
GKZF1
1
Listing
Key style
Straight
90°
Multi-directional
Funnel key
GKN
Series
Multi-entry,
Key-operated
Safety Limit
Switch
A
C
0.5-14 NPT
20 mm
21
30
2NC/1NO,
BBM slow action
3NC,
slow action
A key actuator (ordered separately) is
required for each switch.
Table 3. Order Guide
Catalog Listing
1
GKNA21
GKNC21
GKNA30
GKNC30
1
Conduit
0.5-14 NPT
20 mm
0.5-14 NPT
20 mm
Contacts
2NC/1NO slow action, BBM
2NC/1NO slow action, BBM
3NC slow action
3NC slow action
An actuator key (ordered separately) is required for each switch. Select actuator key by reviewing product nomenclature tree on page 3 and
dimensional diagrams on pages 3 and 4.
Figure 2. Product Dimensions
14,0
[0.55]
30,0
[1.18]
52,0
[2.05]
2 X 3,00
[0.118]
9,0
[0.35]
18,0
[0.71]
40,0
[1.57]
25,0
[0.98]
7,5
[0.30]
90,0
[3.54]
15,5
[0.61]
7,0
[0.28]
64,0
[2.52]
13,0
[0.51]
Conduit thread
6,0 [0.24]
none for conduit thread, M20
Sensing and Internet of Things
3
Key-Actuated Safety Switches, GKN Series
Figure 2. Product Dimensions, continued
GKZ41
GKZ42
24,0
[0.94]
39,0
[1.535]
15,0
[0.59]
40,0
[1.575]
27,5
[1.08]
4,0
[0.16]
2,0
[0.08]
Ø 4,50
[Ø 0.18]
24,0
[0.94]
5,9
[0.23]
Ø 5,5
[Ø 0.22]
56,0 [2.20]
40,0 [1.575]
16,0 [0.63]
GKZ45
GKZF1
40,0
[1.575]
Ø 3,0
[Ø 0.12]
6,0 [0.24]
24,0
[0.94]
2,0
[0.08]
16,0
[0.63]
Metal guide
41,5
[1.63]
4,0
[0.16]
20,0
[0.79]
23,0
[0.91]
2,0
[0.08]
34,0
[1.34]
18,0
[0.71]
4,0
[0.16]
40,0 [1.575]
56,0 [2.20]
16,0
[0.63]
Ø 5,5
[Ø 0.22]
40,0
[1.575]
Funnel key
Table 4. Minimum Actuating Radius
Catalog Listing, Description
GKZ41, Straight key
GKZ42, 90° key (right angle)
GKZ45, Multi-directional key
GKZF1, Funnel key and guide
Radius, min.
160 mm [6.30 in]
160 mm [6.30 in]
18° max. all directions
160 mm [6.30 in]
4
sensing.honeywell.com
ADDITIONAL MATERIALS
The following associated literature is available on the Honeywell
web site at sensing.honeywell.com:
• Product installation instructions
• Product range guide
m
WARNING
•
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
Honeywell warrants goods of its manufacture as being free of
defective materials and faulty workmanship during the appli-
cable 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 defec-
tive.
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.
Find out more
Honeywell serves its customers
through a worldwide network
of sales offices, representatives
and distributors. For applica-
tion assistance, current specifi-
cations, or pricing contact your
local sales office.
To learn more about Honey-
well’s products,
call
+1-815-235-6847 or
1-800-537-6945,
visit
sensing.honeywell.com,
or e-mail inquiries to
info.sc@honeywell.com
Honeywell Sensing and Internet of Things
9680 Old Bailes Road
Fort Mill, SC 29707
honeywell.com
004740-3-EN IL50 GLO
July 2017
© 2017 Honeywell International Inc. All rights reserved.
京公网安备 11010802033920号
EEWORLD
