I have multiple devices that need a DIO connection with 8 wires back to a central device. Would using Ethernet for this purpose be reliable, or would using something like DB9 connectors be better?

I was thinking that because of the twisted pairs that using two separate signals on a pair may cause interference, but I don't know if it would.

I have multiple devices that need a DIO connection with 8 wires back to a central device. Would using an Ethernet cable for this purpose be reliable, or would using something like DB9 connectors be better?

I was thinking that because of the twisted pairs that using two separate signals on a pair may cause interference, but I don't know if it would.