3 Mechanical
Installation
The EZ-SCREEN Type 2 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
If all
mounting,
installation,
interfacing, and checkout procedures are not followed properly, the Banner device
cannot provide the
protection
for which it was designed. The user has the responsibility to ensure 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 device is installed and interfaced to the guarded
machine by
Qualified
Persons
2
, in accordance with this manual and applicable safety
regulations.
3.1 Mechanical
Installation
Considerations
The two primary factors that
influence
the layout of the EZ-SCREEN Type 2 system mechanical
installation
are the Safety Distance
(Minimum Distance) (see
the Safety Distance (Minimum Distance)
on page 11) and the supplemental
safeguarding/
eliminating
considerations
include:
•
on page 17
•
•
on page 16
•
on page 18
WARNING:
Position
Components Carefully
The
emitter
and receiver must be
positioned
such that the hazard cannot be accessed by reaching over, under,
around, or through the sensing
field.
Additional
and supplemental guarding may be required.
3.1.1
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 Type 2 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: Safety Distance (Minimum Distance)
The Banner
emitters
and receivers must be mounted at a distance from the nearest hazard such that an individual
cannot reach the hazard before
cessation
of hazardous
motion
or
situation.
This distance can be calculated using
the formulas in this
section,
as described by ANSI B11.19 and ISO 13855, and must be greater than 100 mm (4 in)
regardless of calculated value. Failure to establish and maintain the minimum distance may result in serious
bodily injury or death.
2
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.
EZ-SCREEN
®
Type 2 Light Screen
www.bannerengineering.com - Tel: 763.544.3164
11
