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May 22, 2023
EZ-SCREEN SLS Safety Light Curtain Instruction Manual
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Chapter Contents
A
ANSI (American National Standards Institute)
Acronym for the American National Standards Institute, an association of industry representatives that develops technical
standards (including safety standards). These standards comprise a consensus from a variety of industries on good prac-
tice and design. ANSI standards relevant to the application of safety products include the ANSI B11 Series, and ANSI/RIA
R15.06. See "Standards and Regulations" on page 7 .
Auto Power-Up
A safety light curtain system feature that enables the system to be powered up into Run mode (or recover from a power
interruption) without requiring a manual reset.
Auto Start/Restart (Trip) Condition
The safety outputs of a safety light curtain system turn off when an object completely blocks a beam. In an Auto Start/
Restart condition, the safety outputs re-energize when the object is removed from the defined area.
Auto Start/Restart (Trip) Initiate
The resetting of a safeguard causing the initiation of machine motion or operation. Auto Start/Restart Initiate is not al-
lowed as a means to initiate a machine cycle per NFPA 79 and ISO 60204-1, and is commonly confused with PSDI.
B
Blanking
A programmable feature of a safety light curtain system which allows the light curtain to ignore certain objects located
within the defined area. See Floating Blanking and Reduced Resolution .
Blocked Condition
A condition that occurs when an opaque object of sufficient size blocks/interrupts one or more light curtain beams. When
a blocked condition occurs, OSSD1 and OSSD2 outputs simultaneously turn off within the system response time.
Brake
A mechanism for stopping, slowing, or preventing motion.
C
Cascade
Series connection (or "daisy-chaining") of multiple emitters and receivers.
CE
Abbreviation for "Conformité Européenne" (French translation of "European Conformity"). The CE mark on a product or
machine establishes its compliance with all relevant European Union (EU) Directives and the associated safety stan-
dards.
Clutch
A mechanism that, when engaged, transmits torque to impart motion from a driving member to a driven member.
Control Reliability
A method of ensuring the performance integrity of a control system or device. Control circuits are designed and con-
structed so that a single failure or fault within the system does not prevent the normal stopping action from being applied
to the machine when required, or does not create unintended machine action, but does prevent initiation of successive
machine action until the failure is corrected.
CSA
Abbreviation for Canadian Standards Association, a testing agency similar to Underwriters Laboratories, Inc. (UL) in the
United States. A CSA-certified product has been type-tested and approved by the Canadian Standards Association as
meeting electrical and safety codes.
Glossary of Safety Terminology
Chapter 12
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