Ez Touch Screen

How can I connect two EZtouch screens to an AB 503 PLC?

First time doing this task any pointer will be appreciated

The two EZtouch will have the same program but they will be 50' apart to control some motor contactors

Thank you

Maybe one of these will do.

http://bb-elec.com/subcategory.asp?subcategoryid=93&Trail=2&TrailType=Top

The display is a master on any communication line. It asks for information from the PLC and the PLC then replies. The standard serial port is designed for 1 initiator and 1 responder. But you wish to have 2 displays and 1 PLC - that is - 2 masters and 1 responder.

The DH-485 protocol which can use the RS485 port can be a peer-to-peer or multi-master setup by means of 'token-passing'. This is a procedure where each unit, one at a time, is allowed to be the master, asking a question and getting a response, then the unit passes on this ability to the next unit in a logical circle (lowest unit address up to the highest address then wrapping back to the lowest address) by sending a certain code.

As long as you units can properly inplement the DH-485 protocol it should be okay.

I did this years ago with about 12 EZTouch screens and a single 5/03. All I needed was the screens, the 5/03 and wire. You will want to use the recommended wire and I don't recall what it was. I'm on vacation and so don't have the info handy, but it was Belden cable and easy to obtain.

One call to Automation Direct and I was sent a word document that answered every question one would have. I'm assuming that EZ-Automation would be of the same help.

One thing different that I would do this time is look into connecting one panel to the SLC with DH-485 and connecting the C-mores together with ethernet.

I really appreciated response ChuckM do you used Df1 or DH485 in order to accomplish the communication between EZ and PLC

Thank you in advance

If I connect more than one EZTouch to a processor, I use DH-485. Actually, in most cases I use DH-485 for the HMI. Not that I have a specific reason, that is just what I prefer.

You will need one link module for the SLC. After that, the EZTouch panels are simply daisy-chained together.

Thank you ChuckM for the quick response I really appreciated. With you generosity information I’ll get the 1747-AIC, AB 503 and two EZ touch to set up the DH485 network.
”Thank you very very much”