20 ZX Series (ZX-L-N) Smart Sensors (Laser Type)
Use Precautions
● EN60825-1
*With respect to the requirements of remote interlock connector, key control, beam attenuator, and emission indicator, Class 3B laser products not
exceeding five times the AEL of Class 2 in the wavelength range of 400 nm to 700 nm are to be treated as Class 3A laser products.
Note: This table is intended to provide a convenient summary of requirements. See text of this standard for complete precautions.
● ANSI Z136.1:1993 “American National Standard for the Safe Use of Lasers”
Control Measures for the Four Laser Classes
Requirements;
Sub-clause
Classification
Class 1 Class 2 Class 3A Class 3B* Class 4
Remote interlock Not required Connect to room or door circuits
Key control Not required Remove key when not in use
Beam attenuator Not required When in use prevents inadvertent exposure
Emission indicator de-
vice
Not required Indicates laser is energized
Warning signs Not required Follow precautions on warning signs
Beam path Not required Terminate beam at end of useful length
Specular reflection No requirements Prevent unintentional reflections
Eye protection No requirements Required if engineering and administrative procedures not practicable
and MPE exceeded
Protective clothing No requirements Sometimes required Specific requirements
Training No requirements Required for all operator and maintenance personnel
Control measures Classification
Engineering Controls 1 2a 2 3a 3b 4
Protective Housing (4.3.1) X X X X X X
Without Protective Housing (4.3.1.1) LSO (see note 2) shall establish Alternate Controls
Interlocks on Protective Housing (4.3.2) ✩✩✩✩XX
Service Access Panel (4.3.3) ✩✩✩✩XX
Key Control (4.3.4) --- --- --- --- • X
Viewing Portals (4.3.5.1) --- --- MPE MPE MPE MPE
Collecting Optics (4.3.5.2) MPE MPE MPE MPE MPE MPE
Totally Open Beam Path (4.3.6.1) --- --- --- --- X
NHZ
X
NHZ
Limited Open Beam Path (4.3.6.2) --- --- --- --- X
NHZ
X
NHZ
Enclosed Beam Path (4.3.6.3) None is required if 4.3.1 and 4.3.2 fulfilled
Remote Interlock Connector (4.3.7) --- --- --- --- • X
Beam Stop or Attenuator (4.3.8) --- --- --- --- • X
Activation Warning Systems (4.3.9) --- --- --- --- • X
Emission Delay (4.3.9.1) --- --- --- --- --- X
Indoor Laser Controlled Area (4.3.10) --- --- --- --- X
NHZ
X
NHZ
Class 3b Laser Controlled Area (4.3.10.1) --- --- --- --- X ---
Class 4 Laser Controlled Area (4.3.10.2) --- --- --- --- --- X
Laser Outdoor Controls (4.3.11) --- --- --- --- X
NHZ
X
NHZ
Laser in Navigable Airspace (4.3.11.2) --- --- --- • • •
Temporary Laser Controlled Area (4.3.12) ✩
MPE
✩
MPE
✩
MPE
✩
MPE
--- ---
Remote Firing & Monitoring (4.3.13) --- --- --- --- --- •
Labels (4.3.14 and 4.7) X X X X X X
Area Posting (4.3.15) --- --- --- • X
NHZ
X
NHZ
Administrative & Procedural Controls 1 2a 2 3a 3b 4
Standard Operating Procedures (4.4.1) --- --- --- --- • X
Output Emission Limitations (4.4.2) --- --- --- LSO Determination
Education and Training (4.4.3) --- --- • • X X
Authorized Personnel (4.4.4) --- --- --- --- X X
Alignment Procedures (4.4.5) --- --- X X X X
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