Short Range Radio I/O

Hi. Im after a way to send 3 or 4 signals from a remote part of our site to the closest PLC. The distance isnt very far ~ 50-100m but the terrain is terrible i.e. A Lagoon, many bramble bushes etc. Obvo to run a cable is going to be a nightmare and more importantly for my boss, too expensive. So i mentioned radio. Previously we have used Churchill controllers http://www.churchill-controls.co.uk/ But due to a company politics issue, we cant use them.

Anyone know any other I/O sending radio products?

Im not looking for a RIO Rack type, just something to send I/O Bits to the PLC I/O Cards.

check out BANNER, they have exactly what you are looking for, i dont have my catalogues with me right now, but i am sure google will be able to help

Hi Oceansoul.
Try this link, i have used these to pass 4 outputs and 8 inputs.
http://www.bannerengineering.com/en-US/wireless/surecross_web_dx70

I have had good luck with Phoenix Contact wireless I/O as well.

http://www.phoenixcontact.com/signal-level-matching/31240_15482.htm

Yep, Banner's DX70 kit would do that well. Or the DX80 for full expandability.

Here are some examples:

http://www.joewazoo.com/network_Wireless_IO.html

Joe_WaZoo

I've tried the Banner devices, and have absolutely no issues with them. They run fine, and some are specifically tailored for extreme low-power operation (say, remote station off of a battery).
They also have excellent connectivity. My remotes are combination analog/digital I/O blocks, and they connect to an Ethernet/IP gateway block that I read in to a convenient AB Logix PLC.

I have also had good success with Phoenix Contact in a very "noisy" environment. Initial project just had digital I/O, but I am in the process of adding Analog to it.

Prosoft also give you an in the rack option.
http://www.prosoft-technology.com/