MICRO SWITCH™ Key-Operated Safety Interlock Switch
GK Series
004790
Datasheet
Issue 1
FEATURES
• Electrostatic epoxy coated die-cast zinc housing with the
EN50041 30 x 60 mm mounting
• Four different types of stainless steel keys
• 1NC/1NO, 2NC, 2NC/1NO, 2NC/2NO, 3NC/1NO, 4NC
contact options
• Positive opening operation of normally closed contacts
to EN/IEC 60947-5-1-3 specification
• Normally open (NO) contacts to indicate key has been
removed
• Unique friction feature design for key retention
• Dual entry head design (side or top entry) for key; up to eight
different key entry positions
• Optional one or two integral LEDs in cover of switch for
monitoring switch signal and/or output status
• Different conduit options for global applications
• Operating temperature range of -25 °C to 85 °C
[-13 °F to 185 °F]
• Switch body environmentally sealed to IP67 and
NEMA 1, 4, 12, & 13
• CE, CSA, and UL agency certifications
• Designed and agency evaluated for safety functions up to and
including a SIL3 level
DESCRIPTION
MICRO SWITCH™ GK Series switches are key-operated safety
interlock rugged metal switches which monitor the positions
of gates, guards, or doors. The key is attached to the moving
portion of the gate, guard, or door. When the gate is closed, the
key is inserted into the GK switch indicating a safe position (gate
closed) and the machine process can start. The positive opening
normally closed contacts
are held closed when the key is
inserted into the GK switch. Opening the gate, removes the key
from the switch. This action opens the normally closed contacts
of the switch and interrupts the machine’s control circuit.
GK Series switches are designed with dual-entry positions for
the key. The key can be inserted from the top or side of the
switch which allows more flexibility in mounting the switch in the
application. There are four different styles of keys and a variety
of switch contact arrangements to satisfy the requirements for
most applications requiring a safety interlock key switch. GK
Series switches are designed with a unique friction feature for
key retention. GK Series switches have been evaluated for safety
functions up to and including a safety integrity level (SIL) of SIL3
when evaluated to the requirements of IEC 61508-2:2010.
POTENTIAL APPLICATIONS
• Hinged or sliding gates, guards, or doors for:
- Machine tool and metalworking equipment
- Plastic molding equipment
- Robotic cells
- Special purpose machinery
DIFFERENTIATION
• Up to four contacts within each switch for control circuit
applications (NC contacts) and auxiliary contacts (NO
contacts) to indicate the key removal from the switch
• Optional one integral LED to indicate power to the switch or
two integral LEDs to indicate power to the switch and output
status of the switch
• Designed and evaluated for safety functions up to and
including a SIL3 level
VALUE TO CUSTOMERS
• Unique friction feature design for key retention
• Positive opening of all normally closed contacts when key is
removed from the switch
• Electrical connection via threaded conduit and terminal screws
or an integral mini style 10-pin connector
• GK Series switch mount to a standard EN50041 30 x 60 mm
dimension
• Different styles of stainless steel keys to accommodate hinged
or sliding doors, gates, or guards
PORTFOLIO
Honeywell safety interlocking switches include the metal
solenoid
GKL/R Series,
miniature plastic
GKM Series,
EN50047
plastic body
GKE Series,
and plastic body
GKN Series.
Honeywell also offers non-interlocking safety switches (GSS
Series),
non-contact safety switches (FF
Series)
and cable/rope-
pull safety switches (1CPS
& 2CPS
Series).
Sensing and Productivity Solutions
MICRO SWITCH™ Key-Operated Safety Interlock Switch, GK Series
Table 1. Specifications
Characteristic
Description
Certifications
Housing material
Key (actuator) material
Conduit/electrical connection
Contact/switch options*
Contact design
Parameter
Dual entry key operated safety interlock switch
CSA (C22.2 No.14. File 57323),
UL (per UL508, File E37138),
CE (per IEC 60947-1, IEC 60947-5-1)
Epoxy coated die-cast zinc
Stainless steel
0.5-14 NPT, 20 mm, PG 13,5 threaded conduit; 10-pin “mini” style connector
1NC/1NO; 2 NC; 2NC/2NO; 3NC/1NO; 4NC
Double break, electrically separated
Contact material
Utilization category
Rated operational voltage (Ue)
Rated operational current (Ie)
Thermal current (Ith)
Rated insulation voltage (Ui)
Rated impulse withstand
voltage (Uimp)
Short circuit protective device
(SCPD)
Conditional short-circuit
current
Pollution degree
Environmental sealing
Operating temperature
Shock
Vibration
MCTF (Mechanical life)
MCTF (Electrical life)
SIL Capability
Proof test interval
Optional LEDs***
Silver alloy (standard); gold-plated silver alloy (for low energy applications)
AC15, A300/A600**; DC13 Q300
240 Vac, 600 Vac, 250 Vdc
3 A, 1.2 A, 0.27 A
10 A
300 V, 600 V
2500 V
Class J fuse (10 A/600 V)
1000 A
3
IP67; NEMA 1, 4, 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 %
>60,000 cycles
Up to and including SIL3 (HFT1), IEC 61508-2:2010
1 year
GLC Series with 1 LED pilot light in front cover (supply voltage 12 Vac/dc to 250 Vac/dc)
GLD Series with 2 LED pilot lights in front cover (supply voltage 18 Vdc to 30 Vdc)
.
*All normally closed (NC) contacts are positive opening
**A600 for 1NC/1NO contacts.
*** When switch includes LED pilot lights, the switch voltage is limited to the rated LED voltage.
Table 2. Electrical Rating
ac
A300/A600**
Ue
Volts
120
240
380
480
500
600
2
AC15
Ie
Amps
6
3
1.9
1.5
1.4
1.2
VA Rating
Make
7200
7200
7200
7200
7200
7200
Break
720
720
720
720
720
720
Ue
Volts
24
125
250
Ie
Amps
2.8
0.55
0.27
VA Rating
Make
69
69
69
Break
69
69
69
1 V 10 μA min.
50 V 100 mA max.
dc
gold-plated contacts
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