Programmable relay as controller?

[thomAZ]

Has anyone seen one of these? Programmable Relay
I used the free programing software to write a test program and it looked like it would do most of the things I wanted. I need to figure out how to do the temp. You can also run the program in simulator mode to test it out. I thought it had some potential.

 

[easttn]

Nice find. If you can wire the outboard isolation relays your good to go. That same webpage offers temp controllers, use those as an input to the PR. Give it a shot. The analog in can do your pH. You'll need a 24VDC power supply.

 

[marm64]

I have used the Simen Logo!, Allen Bradley Pico, and the Telemecanique Zelio and they all work good. The one thing that is needed is a real time clock built in. The Logo! is nice for analog input logic since it has built in hysteresis function.

This looks like a good unit and has expansion and the software is free. I am going to take a look at it and see what it has to offer.

 

[thomAZ]

I beleive the TECO has real time clock built in. Check out the free software for programming it. It sounds like you have more experience than I do. I think it would work pretty good. I don't think it has any math functions if that was something you needed to convert probe outputs or something.

 

[marm64]

It does indeed have a real time clock. They also sell the comm cable for pretty cheap and are expandable. The software is not as nifty as some of the others but I think for the money it is a pretty cheap controller. The couple of drawbacks that I saw was that the clock timers were not as flexible, fine for turning lights on and off, and there are not a lot of analog functions.

 

[best49erfan]

I have a pico and it is good. no analog or clock, but it works well. that controller is half the price of the pico. the pico comm cable is $75.