Rockwell Automation Publication 450L-UM001F-EN-P - March 2022
75
Chapter 6 Installation and Wiring
Figure 52 - Invert Adjacent Pairs
Invert the sticks in adjacent pairs such that the “top” and “bottom” of the sticks
are opposite: The more accurate the alignment of 450L safety light curtains, the
less probability there is of cross-talk/optical interference.
The transceiver architecture of safety light curtains does not allow a back-to-
back installation of adjacent transmitters as is common with safety light
curtain systems with a pure transmitter and receiver architecture.
Depending on the installed distance, the reduced operating functionality (see
Low Operating Range on page 27
) instead of an optical barrier can be used to
stop optical interference of adjacent GuardShield safety light curtain systems.
For 450L-E safety light curtains only: To stop optical interference between
neighbor 450L-E safety light curtain systems can cause a safety issue, in
addition of an optical barrier the beam code feature (see
) can be selected. Beam code changes the pulse pattern of infrared light
that a 450L-E safety light curtain stick emits.
450L Safety Light Curtain with Interference Rejection
450L PAC safety light curtains have permanently enabled interference
rejection. This feature is a user-configurable option for 450L-E safety light
curtains. This scheme allows multiple 450L PAC safety light curtain systems to
be mounted next to others or on the same plane. Where only two pairs are
mounted, beam coding must be enabled for only one of the pairs and they
must be oriented with both transmitter (Tx) sticks back-to-back or both
receiver (Rx) sticks back-to-back, as shown in
. If both
pairs are powered up simultaneously without this orientation, it is possible for
the Rx of one system to attempt to pair with the Tx of the other system, which
causes both sticks to prompt for a teach-in.
1. RX of first and Rx of second pair not next to each other
2. First pair face up, second pair face down
3. Use “reduce range”. Turn on the second DIP switch on the LLC
Rx
Tx
Tx
Rx
Power
plug-in
bottom
Power
plug-in
top
Power
plug-in
face
bottom
Power
plug-in
face top
Rx
Tx
Tx
Rx
Содержание Allen-Bradley 140M
Страница 8: ...8 Rockwell Automation Publication 450L UM001F EN P March 2022 Table of Contents Notes ...
Страница 20: ...20 Rockwell Automation Publication 450L UM001F EN P March 2022 Chapter 2 Safety Concepts Notes ...
Страница 108: ...108 Rockwell Automation Publication 450L UM001F EN P March 2022 Chapter 7 Status Indicators and Troubleshooting Notes ...
Страница 114: ...114 Rockwell Automation Publication 450L UM001F EN P March 2022 Chapter 8 Safety Instructions Notes ...
Страница 184: ...184 Rockwell Automation Publication 450L UM001F EN P March 2022 Appendix B Typical Installations Notes ...
Страница 190: ...190 Rockwell Automation Publication 450L UM001F EN P March 2022 Index ...
Страница 191: ...Rockwell Automation Publication 450L UM001F EN P March 2022 191 GuardShield Safety Light Curtain User Manual ...