1769 modules with 120v on the backplane

I was wanting to use the 1769-ow8i module, but I think it takes a bus voltage of 24vdc and I need it to take a 120v system. I know it can take an ac/dc voltage through its isolated output contact, but what about the actual bus voltage to supply it?

HMMM? From my read of the manual that is not something you have control of. 24v is what operates the individual relays internally. The contacts are isolated from that. See manual below page 10

Why do you think you need 120v?

http://literature.rockwellautomation.com/idc/groups/literature/documents/in/1769-in053_-en-p.pdf