5 Mechanical Installation
The EZ-SCREEN LS Basic system performance as a safety guarding device depends on:
•
The suitability of the application
•
The proper mechanical and electrical installation and interfacing to the guarded machine
WARNING:
•
Read this Section Carefully Before Installing the System
•
Failure to follow these instructions could result in serious injury or death.
•
If all mounting, installation, interfacing, and checkout procedures are not followed properly, this
Banner Engineering device cannot provide the protection for which it was designed.
•
The user is responsible for ensuring that all local, state, and national laws, rules, codes, or
regulations relating to the installation and use of this control system in any particular application
are satisfied. Ensure that all legal requirements have been met and that all technical installation
and maintenance instructions contained in this manual are followed.
•
The user has the sole responsibility to ensure that this Banner Engineering device is installed and
interfaced to the guarded machine by Qualified Persons, in accordance with this manual and
applicable safety regulations. A Qualified person is a person who, by possession of a recognized
degree or certificate of professional training, or who, by extensive knowledge, training and
experience, has successfully demonstrated the ability to solve problems relating to the subject
matter and work.
5.1 Mechanical Installation Considerations
The two primary factors that influence the layout of the EZ-SCREEN LS Basic system mechanical installation are:
•
Safety Distance (Minimum Distance) (see
Calculating the Safety Distance (Minimum Distance)
•
Supplemental safeguarding/eliminating pass-through hazards (see
Reducing or Eliminating Pass-Through Hazards
on page 24)
Other considerations include:
•
Emitter and Receiver Orientation (see
Emitter and Receiver Orientation
on page 29)
•
Adjacent Reflective Surfaces (see
on page 26)
•
Use of Corner Mirrors (see
on page 28)
•
Installation of Multiple Systems (see
Installation of Multiple Systems
on page 30)
WARNING:
•
Position the System Components Carefully
•
Failure to observe this warning could result in serious injury or death.
•
Position the system components such that the hazard cannot be accessed by reaching over,
under, around, or through the sensing field. Additional and supplemental guarding may be
required.
5.1.1 Calculating the Safety Distance (Minimum Distance)
Safety Distance (Ds), also called Minimum Distance (S), is the minimum distance required between the defined area and the
closest reachable hazard point. The distance is calculated so that when an object or a person is detected (by blocking a
sensing beam), the EZ-SCREEN LS Basic sends a stop signal to the machine, causing it to stop by the time the object or
person can reach any machine hazard point.
The distance is calculated differently for U.S. and European installations. Both methods take into account several factors,
including a calculated human speed, the total system stopping time (which itself has several components), and the depth
penetration factor. After the distance has been determined, record the calculated distance on the Daily Checkout Card.
WARNING:
•
Calculate the Safety Distance (Minimum Distance)
•
Failure to establish and maintain the safety distance (minimum distance) could result in serious
injury or death.
•
Mount the components at a distance from the nearest hazard such that an individual cannot reach
the hazard before cessation of the hazardous motion or situation. Calculate this distance using the
supplied formulas, as described by ANSI B11.19 and ISO 13855. Mount the components more
than 100 mm (4 in) away from the hazard, regardless of the calculated value.
EZ-SCREEN
®
LS Basic Safety Light Curtain
www.bannerengineering.com - Tel: + 1 888 373 6767
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