Rockwell Automation 442L SafeShield Safety Light Curtain Hardware - Manual (Page 21)

SafeShield Safety Light Curtain Hardware User Manual
21
• During the test the sender indicates .
• The test is successful, if the SafeShield safety light curtain receiver
switches to red, i.e. the output signal switching devices (OSSDs)
are deactivated. In a cascade this only applies for the host.
Notes SafeShield safety light curtain-Sender and receiver are self-
testing and do not require any external sender test. You
can deactivate the sender test with the aid of the SCD, if
the test is not required for the current application.
To be able to perform a sender test …
• The option Enable sender test must be active. This is
the condition as supplied.
• A means of controlling the test input must be available.
Device symbol SafeShield safety light curtain Host
(sender), context menu Configuration draft, Edit,
option Enable sender test.
Notes If you do not connect the test input, then you must
deactivate the Sender test function with the aid of the
SCD. Otherwise the light curtain will be permanently
switched to red.
The electrical connection at the test input is described in
“Test Input (Sender Test)” on page 30.
Functions That Cannot Be Combined
Table 13: Functions that cannot be combined
Function that can
be configured
Limitation
Teach-in key-
operated switch on
the extension
connection •
Emergency stop function can only be used in
conjunction with a SafeShield function module
(teach-in on the module, emergency stop on the
SafeShield safety light curtain)
Emergency stop •
Teach-in only possible in conjunction with
SafeShield function module
Reduced resolution
•
Not with floating blanking with partial object
monitoring
•
Not with fixed blanking and increased size
tolerance
Floating blanking
with partial object
monitoring
•
Not with floating blanking with partial object
monitoring
•
Cannot be used if a neighboring area uses floating
blanking with complete object monitoring
•
Not with fixed blanking and increased size
tolerance
•
Not with reduced resolution
Floating blanking
with complete object
monitoring •
Cannot be used if a neighboring area uses floating
blanking with partial object monitoring
•
Not with fixed blanking with increased size
tolerance
Fixed blanking with
increased size
tolerance
•
Not with floating blanking with partial object
monitoring
•
Not with floating blanking with complete object
monitoring
•
Not with reduced resolution
!
Installation and Mounting
This section describes the preparation and completion of the
installation of the SafeShield safety light curtain. The installation and
mounting requires two steps:
• Determining the necessary safety distance
• Installation with swivel mount or side brackets
The following steps are necessary after mounting and installation:
• Making the electrical connections (page 26)
• Aligning sender and receiver (page 30)
• Checking the installation (page 21)
Determining the Safety Distance
The light curtain must be mounted with the correct safety distance
• From the hazardous point
• From reflective surfaces
Safety Distance from the Hazardous Point
A safety distance must be maintained between the light curtain and
the hazardous point. This safety distance ensures that the
hazardous point can only be reached after the dangerous state of
the machine has been completely stopped.
The safety distance as defined in EN 999 and EN 294
depends on:
• Stopping/run-down time of the machine or system (The stopping/
run-down time is shown in the machine documentation or must
be determined by taking a measurement.)
• Response time of the entire protective device, e.g. SafeShield
safety light curtain consisting of host and guest (see “Response
Times” on page 37)
• Reach or approach speed
• Resolution of the light curtain and/or beam separation
• Other parameters that are stipulated by the standard depending
on the application
Under the authority of OSHA and ANSI the safety
distance as specified by ANSI B11.19 1990 E.4.2.3.3.5 and
Code of Federal Regulations, Volume 29,
Part 1910.217 … (h) (9) (v) depends on:
• Stopping/run-down time of the machine or system (The stopping/
run-down time is shown in the machine documentation or must
be determined by taking a measurement.)
• Response time of the entire protective device, e.g. SafeShield
safety light curtain consisting of host and guest (see “Response
Times” on page 37)
• Reach or approach speed
ATTENTION: No protection without
correct safety distance!
The reliable protective effect of the light
curtain depends on the system being
mounted with the correct safety distance
from the hazardous point.