IO redundancy, DO880, AC800M HI
After reading several manuals I still can't find a clear answer to a simple question:
Can I have a single CPU PM867 SIL3 with one IO cluster with redundant IO (DO880) and a few cluster with single IO?
I can't find out what TU8xx and TBbxx to use.
All the layouts I see in manuals show redundant CPU with redundant IO.
When I added it into Control builder it compiled without problem, so I guess it's possible...Confused
Yes, it is possible to have Single CPU PM867 with one IO cluster with redundant IO modules and other IO cluster with Single IO.
The base/TU of TB840 and IO module shall be selected accordingly.
Example: Redundant DO880 modules needs TU842 or TU843. Both these base have 2x electrical modules bus connections hence we need to have TU840 or TU848 for TB840 module.
Since controller or CPU single, we can install only one TB840 module on above TUs (TB840 or TU848).
For single IO cluster, you have 2 options.
1. You can same configuration as redundant, but it reduces number of IO modules.
2. You can use single TB840 with TU807 or TU841 or TU849. TB840 with TU807 is best option.
Hope it helps. Please let me know if you need more clarity.
Source: 3BSE020924 A and 3BSE020923 A