Pardon my ignorance on the task at hand, but why would you bother looking for a multiplexer with Ethernet/IP to a PLC? Plenty of bandwidth over Ethernet to read individual IO. I can only assume its a $$$ issue?
I'm with kolyur, use a remote IO rack and load it with RTD cards. Wago would another alternative.
Thanks for your response.
The reason is mainly because of cost implications.
RTD cards and individual analog cards cost alot. While a MUX can bring this down. The other reason is, it's quite a large number of temp transmitters. A total of 320 transmitters divided into 4 remote drops amounting to 80 in each drop. The remote drops have a number of DI and DO.
Therefore there is a lot of cards if I went individual input into the PLC.
Currently I have something like this:
MainPanel (Compact logix - L33ER)---
RIO1(Point IO)DI/DO/80AI---
RIO2(Point IO)DI/DO/80AI---
RIO3(Point IO)DI/DO/80AI---
RIO4(Point IO)DI/DO/80AI.
Reason I am looking for Ethernet/IP is because Rockwell is not so modbus friendly for instance and a modbus card could cost a bit. Also I am stuck with compact logix. So I am trying to see what can be a best fit.
Please share your thoughts?
Really.. how can I connect 80 such temp transmitters per remote drop in the best way possible??? As I mentioned before this PID is slow and so I can afford to have the values update in seconds rather than a live value as the temp change is relatively slow in this process.
Just cant seem to find a fit for this requirement based on the best cost possible.
Thanks
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