MICRO SWITCH™ Key-Operated Safety Interlock Switch
GK Series
004790
Issue 1
Datasheet
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]
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
• 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
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.
POTENTIAL APPLICATIONS
• Hinged or sliding gates, guards, or doors for:
- Machine tool and metalworking equipment
- Plastic molding equipment
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.
- 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
VALUE TO CUSTOMERS
• Unique friction feature design for key retention
• Positive opening of all normally closed contacts when key is
removed from the switch
• Designed and evaluated for safety functions up to and
including a SIL3 level
• 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
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).
• Different styles of stainless steel keys to accommodate hinged
or sliding doors, gates, or guards
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