Allen Bradley Point I/O parts

I have a job where I need another 8 inputs and 8 outputs in a system I am working on.  The below pic shows the output module that need another of.  Can you confirm that the parts I need are:

• 1734-OB8E
• 1734-MB
• 1734-RTBS
• And for the digital inputs I need:
• • 1734-IB8
  • 1734-MB
  • 1734- RTBS

   

  Would that be a correct assembly?

A: The base parts are normally sold as a single unit (1734-MB + 1734-RTBS) is 1734-TBS



So to add 8 in and 8 out you would need

1x 1734-IB8

1x 1734-OB8

2 x 1734-TBS