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Guard Locking Safety Switches
TRODEKS Engineering | Thermocouples, Pressure Transducers, Flow Meters, PID Controllers
  • Solenoid Locking Interlock Safety Switch
  • High Holding Force Keeps Guard Doors Closed Until Hazard can be Removed
  • 8 Actuator Entry Positions–Designed with a Rotatable Head
  • KLM Series: Die Cast Metal Body with Die Cast or 316 SS Head
  • KLP Series: Polyester Body with 316 SS Head
  • KL3-SS Series: 316 SS Body and Head—Mirror Polished to Ra10
  • LED Indicators for Status of Solenoid Applied Power (LED1) and Guard Lock Status (LED2)
  • 2 Normally-Closed (NC) Safety Circuits: Solenoid Lock and Actuator/Guard Wired in Series
  • 2 Normally-Open (NO) Auxiliary Contacts: One for Indication of Actuator Status and One for Lock Status
  • 2 Emergency Manual Release Points
 Manuals (contact with email : [email protected])


Guard locking switches aredesigned to provide robustposition interlock detection formoving guards and provide alock mechanism to keep theguard closed until the hazard hasbeen removed. They are tongueoperated and are designed to fitto the leading edge of sliding orhinged machine guards to providepositively operated switchingcontacts and provide a tamperresistant key mechanism that isnot easily defeatable.

Depending upon the riskassessment for the application,they can be used independentlyto provide positively operatedcontacts to EN60947-5-1 orthey can be used in combinationwith any dual channel safetymonitoring relays to provide up toPLe Category 4 to ISO13849-1 orSIL3 EN62061. They are offeredwith a choice of various actuatorsto aid installation and maintaindurability throughout the rigorousapplications of Factory Automation,Packaging, Food Processing,Pharmaceutical and Petro-Chemical Industries.

The switch is rigidly mountedto the frame of the guard ormachine. The actuator is fittedto the moving part (frame) of theguard and is aligned to the switchentry aperture. The actuatorprofile is designed to match a cammechanism within the switch headand provides a positively operatedinterlock switch. When the actuatoris inserted into the switch thesafety contacts can be closed andallow the machine start circuit tobe enabled. When the solenoidreceives the required signal thesafety contacts are positivelyopened, the machine circuit isbroken and the guard door canbe opened. They can be used incombination with safety timers toprovide a delay before allowing theguard to open (e.g. for machineswhich require run down). Standardversions automatically spring lockat the insertion of the actuatorand will only unlock when poweris applied to the solenoid. Theseswitches are sealed to NEMA 6(IP67) and provide long termprotection against moisture ingress.

Standards: ISO14119, EN60947-5-1, EN60204-1, ISO13849-1, EN62061 UL508
Safety Classification and Reliability Data:
Mechanical Reliability B10d: 2.5 x 106operations at 100 mA load
ISO13849-1: Up to PLe depending uponsystem architecture
EN62061: Up to SIL3 depending uponsystem architecture
Safety Data–Annual Usage: 8 cyclesper hour/24 hours per day/365 days
PFHd: 3.44 x 10-8
Proof Test Interval (Life): 35 years
MTTFd: 356 years
Solenoid Voltage: 110 Vac or 24 Vdc/Vac(see To Order table)
Solenoid Wattage: 12W
LED2 Supply Voltage: 24 Vdc
Utilization Category: AC15 A300 3A
Thermal Current (lth): 5A
Rated Insulation/Withstand Voltages:600 Vac/2500 Vac
Travel for Positive Opening:10 mm (0.39")
Actuator Entry Minimum Radius:
    Standard: 175 mm (6.89")
    Heavy-Duty: 100 mm (3.93")
Maximum Approach/WithdrawalSpeed: 600 mm/s
Holding Force:
    KLP Series: F1Max, 1800N, Fzh 1384N
    KLM, KL3-SS Series: F1Max, 2000N, Fzh 1538N
Body Material:
    KLM Series: Die cast (painted red)
    KLP Series: Polyester
    KL3-SS Series: 316 Stainless Steel
Head Material:
    KLM Series: Die cast (painted red) or 316 stainless steel
    KLP Series: 316 stainless steel
    KL3-SS Series: 316 stainless steel
Enclosure Protection:
    KLM, KLP Series: NEMA 6 (IP67)
    KL3-SS Series: NEMA PW12 (IP67K), NEMA 6 (IP67)
Operating Temperature: -25 to 50°C (-13 to 122°F)
Vibration: IEC 68-2-6 10 to 55 Hz +1 Hz; excursion: 0.35 mm 1 octave/min
Conduit Entry: 1/2 NPT or M2312-way (see To Order table)
Fixing: 4 x M5
Weight (of Switch):
    KLM Series: 770 g (1.7 lb), 795 g (1.75 lb) with SS head
    KLP Series: 575 g (1.3 lb)
    KL3-SS Series: 1290 g (2.85 lb)
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