What this backplane is
The Omron CS1W-BC103 is a 10-slot CPU backplane for the CS1 Series, the chassis that the CPU and its dedicated local IO modules seat into. It is listed in bulk packaging and is intended for use with CS1 Series CPUs and IO — anything outside that family is not a valid host.
RFQ posture
Specify CS1W-BC103 into the BOM line against this RFQ; the backplane seat count and CS1 Series compatibility are the two facts the quote needs to be locked against.