MICRO SWITCH Key Actuated Safety Switches 004750 GKM Series 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 POTENTIAL APPLICATIONS DESCRIPTION Safety interlock for small doors and apertures on machinery When the application requires a miniature key-operated safety Safety interlock for multiple doors on machinery with daisy interlocking limit switch for machine guarding, Honeywell chain option (twin connectors) 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 DIFFERENTIATION space available on machinery. The double-insulated plastic Miniature package size of 34 mm L x 16 mm W x 70 mm H housing and rugged stainless steel actuator key are better Switch design with dual entry (side or top) for actuator key suited for demanding environments. The unique design of Daisy-chain capability for monitoring multiple gates on the switch allows the actuator key to be inserted from the machinery top or the side. The switch can be mounted from the front or Rigid or flexible stainless steel actuator keys back as required. As with the Honeywell safety limit switches, all normally closed contacts are positive opening . Direct PORTFOLIO mechanical linkage within the switch force the normally In addition to the GKM Series safety interlocking limit switches, closed contacts open when the actuator key is removed from Honeywell offers other safety interlocking limit switches. These the switch, opening the circuit. The switches are available include the EN50047 plastic body GKE Series, plastic body with either a cable connection or an integral four-pin M12 GKN Series, EN50041 metal body GKB Series, and metal body connector. 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. Sensing and Internet of ThingsKey-Actuated Safety Switches, GKM Series Table 1. Performance Specifications Characteristic Parameter Description Dual entry key-operated safety interlock switch CE, DOC 141 (EN60947-1 and EN 60947-5-1) Agency certifications cULus, UL508 (File E37138) SIRA, Functional Safety Certificate (IEC 61508-2:2010) Housing material Red glass-filled polyester body, black glass-filled polyamide actuator housing Actuator key material Stainless steel Side or bottom exit cable (UL rated 105 C with PVC jacket and cores four conductor 0.5 mm, 20 AWG). Side or bottom exit integral M12 Micro 4-pin dc-style connector, Electrical connection Side and bottom exit (twin connectors) integral M12 Micro 4-pin dc style connectors for daisy chaining and mon- itoring multiple doors Contact/switch options 1NC/1NO slow action BBM, 2NC slow action Contact design Double break, electrically separated (Zb) Contact material Silver alloy (standard), gold-plated (low energy applications) Electrical ratings See Table 2 Utilization category AC-15, B300 DC-13, Q300 Rated operational 240 Vac, 250 Vdc voltage (Ue) Rated operational 1.5 A, 0.27 A current (Ie) Thermal current (Ith) 5 A, GKME Series 2 A Rated insulation (Ui) 500 V Rated impulse withstand 2500 V voltage (Uimp) Short circuit protection Class RK5 fuse, rated at 4.5A device (SCPD) Pollution degree 3 Environmental sealing IP 66/67, GKME Series (twin connectors) IP66 per EN60529 NEMA 1, 12, 13 Operating temperature -25 C to 85 C (-13 F to 185 F) Shock 50 G per IEC 60068-2-27 Vibration 10 G per IEC 60068-2-6 MCTF (Mechanical life) >1,000,000 cycles with single-sided confidence limit of 95% MCTF (Electrical life) 32,000 cycles SIL Capability SIL3 capable with HFT=1, SIL2 capable with HFT=0 with reference to IEC 61508-2:2010 Functional Safety Proof test interval 1 year All normally closed contacts are positive opening HFT (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 DC I = 5 A 30 Vdc, 2 A max. 1 Vdc, 10 mA min. th 1 V, 10 mA min. I = 2 A 30 Vdc, 100 mA max. th B300 AC15 Q300 DC13 50 V, 100 mA max. I = 2 A th Ue Ie Ue Ie Volts Amps Volts Amps 120 3 125 0.55 240 1.5 250 0.27 2 sensing.honeywell.com