PLC network cable

Sorry, forgot to post my name
This is a bit off subject, but does anyone know if there is a switch that supports shielded twisted pair cabling? We are networking some PLCs, and we found a switch, the Cisco Catalyst 1900 series switch, but in the specs, it states that it uses UTP, but in the factory/plant, we need shielded because of the noise. Any suggestions?

Our systems were designed with a normal 'auto' mode and a 'semi-auto' mode. Part of the hardware to effect this is some T-bar relays which switch from computer control to local operator keypad control. I seem to remember these are 8-pole reed contact types switching four twisted pairs. Google link: t-bar relay

I know Siemens has one, at a fairly hefty $2000 US or so. You might also look into : http://www.n-tron.com/index.html

They make Industrial type Ethernet/Communications gear.