46
Rockwell Automation Publication 450L-UM001F-EN-P - March 2022
Chapter 4 Safety Function
•
Use termination plug 898D-81CU-DM
(a)
at the cascading plug-in of a
transceiver working as an Rx.
•
Use termination plug 898D-81CU-DM or M12 sealing cap
(1485A-M12) at the cascading plug-in of a transceiver working as a Tx.
Figure 27 - Cascaded System with 450L-APC-IO-8 as Last Module
When a 450L-E or 450L PAC safety light curtain stick operates as a receiver
with a 450L-APC-IO-8 cascading plug-in, the corresponding transmitter can
accept, but does not require, the installation of a 450L-APC-IO-8 cascading
plug-in (see
).
Figure 28 - Cascaded System
A cascaded system with three pairs and only two 450L-APC-IO-8 supply power
for all transmitters that are wired separately.
Manual start modes and relay monitoring (EDM) are not available on cascaded
middle and end pairs of a cascading 450L safety light curtain system with DIP
switch configuration. However, it is possible to configure these operating
modes at the receiver of the host pair and allow the whole cascading system to
operate in these modes.
For features like beam coding or blanking, each cascaded pair must be
configured separately.
For two-sensor muting applications, the muting function applies to the
cascaded system. Four-sensor muting cannot be applied to cascaded systems.
Cascading and Blanking
When a 450L-E safety light curtain is installed for cascading, each cascading
450L-E pair operates as a standalone safety light curtain pair with its OSSDs
connected in series to the host pair OSSDs. Therefore, if requested, it is
necessary to configure fixed blanking and/or reduced resolution in each
cascaded pair. This configuration is accomplished by inserting in each 450L-E
safety light curtain receiver an 8-pin 450L-APR-MU-8 plug-in that the blanking
functionality is provided. First, set the DIP switches for the requested blanking
function before you start assembling the light curtain sticks. Then, align all
pairs and secure the brackets. It is then possible to teach each light curtain pair
receiver with the Teach-In procedure. A successful completion of the teach
function changes the operating mode of that pair only. During the teach-in
process, the OSSDs of that pair and the OSSDs of the host segment are off
(0V). Connected Components Workbench software can also be used to
configure blanking for each cascaded pair.
(a) The termination plug has three pins that are shorted together (pins 2, 5, and 6). It is only needed on the receiver side.
Pair 1
Pair 2
1485A-M12
898D-81CU-DM
Rx
Tx
Cascaded
Plug-in 1
Cascaded
Plug-in 2
Pair 1
Pair 2
Rx
Tx1
Pair 3
Tx3
Tx2
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 ...