HLZ Heavy-Duty Guard Locking Safety Switch with RFID, 316 Stainless Steel and IP69K

The HLZ is a heavy-duty guard locking safety switch designed for demanding industrial applications requiring high locking force, environmental protection and advanced functional safety. 

Manufactured from mirror-polished 316 stainless steel and rated to IP69K, the HLZ provides excellent resistance to water, dust, corrosion and high-pressure washdown environments. Its robust locking mechanism delivers a holding force of up to 10,000 N. 

An integrated, high-coded RFID sensor provides Type 4 interlocking in accordance with EN ISO 14119. The rotating head offers three actuator entry positions, while the flexible actuator provides increased tolerance to guard misalignment. 

The HLZ incorporates OSSD safety outputs and can achieve safety levels up to Category 4, PL e and SIL 3, including when multiple devices are connected in series. Four clearly visible status LEDs on the lid provide rapid visual indication of the switch, guard, lock and fault conditions. 

The larger enclosure provides sufficient internal space for direct wiring, allowing installers to select the most suitable cable type and connection method for the application. An optional rear escape release accessory is also available for applications where personnel may enter the safeguarded area and require a means of escape in the event of an emergency. 


  • Mirror Polished 316 Stainless Steel
  • IP67 and IP69K Tested
  • Suitable for SIP and CIP Cleaning
  • Flexible RFID Coded Actuator
  • Actuator Entry from 3-Positions
  • Connects up to 30 Units – CAT4, SIL3, PLe
  • Compact Design: 30mm x 30mm x 133mm
  • 10,000N Holding Force
Part Number Part Description Voltage Connection Type Auxiliary Override Output Type IP Rating Holding Force
471001 HLZ 24V DC RFID Locking Switch OSSD IP69K M20 10kN (std manual release) 24V DC M20 Lid and Side OSSD IP69K 10kN
471301 HLZ 24V DC RFID Locking Switch OSSD IP69K M20 10kN (no manual release) 24V DC M20 No Release OSSD IP69K 10kN
471401 HLZ 24V DC RFID Locking Switch OSSD IP69K M20 10kN (lid only manual release) 24V DC M20 Lid Only OSSD IP69K 10kN
471003 HLZ 24V DC RFID Locking Switch OSSD IP69K QC-M12 10kN (std manual release) 24V DC QC-M12 Lid and Side OSSD IP69K 10kN
471303 HLZ 24V DC RFID Locking Switch OSSD IP69K QC-M12 10kN (no manual release) 24V DC QC-M12 No Release OSSD IP69K 10kN
471403 HLZ 24V DC RFID Locking Switch OSSD IP69K QC-M12 10kN (lid only manual release) 24V DC QC-M12 Lid Only OSSD IP69K 10kN

Technical Data
ApprovalsTUV, cULus
Classification and Coding Level according to EN ISO 14119Type 4, High
TechnologyRFID, Power to Unlock
Housing Material316 Grade Stainless Steel
Supply Voltage24Vdc (+/- 10%) SELV/PELV or Class 2
Power ConsumptionR+ (50mA Max.) / S+ (500mA Max.) (Solenoid)
Outputs Rated Voltage24 Vdc
Outputs Max. Current0.1 A
Outputs Min. Current1 mA
Outputs TypeOSSD, PNP
Inputs Rated Voltage24 Vdc
Inputs Rated Current2 mA
Dielectric Withstand250V.ac
Insulation Resistance100 Mohms
Holding Force (ISO14119)F1max: 10,000 N / Fzh: 7,692 N
Adjustable Spring Ball CatchAdjustable 30 – 100N. (Light latch)
Coding level (ISO14119)Type 4 High
Assured Locking distance6mm
Sao / Sar (RFID)10mm / 20mm
Response Time Guard Open60ms max.
Response Time Inputs Off20ms max.
Actuator entry minimum radius175mm
Enclosure ProtectionIP67, IP69K (QC version is IP67 at the connector)
Operating Temperature-25 ... +55 °C
Mechanical Life Expectancy (B10d)2.5 x 10 6 cycles at 100mA load
VibrationIEC68-2-6, 10-55Hz+1Hz Excursion: 0.35mm, 1 octave/min

Characteristic data according to IEC62061 (used as a subsystem)
Safety Integrity LevelSIL 3
PFH (1/h)1.0 E-09 (Corresponds to 1% of SIL3)
PFD (Av.)8.7 E-05 (Corresponds to 9% of SIL3)
Proof Test Interval T120a

Characteristic data according to EN ISO13849-1
Performance Levele
CategoryCat 4
MTTFd771a
Diagnostic Coverage DCHigh

Information with regard to UL Standards
Type 1 enclosure. Use Class 2 power supply or equivalent. Maximum temperature 40°C. Maximum output 24V.dc 100mA.