ryangriggs
Lifetime Supporting Member
Hello, I have been tasked with replacing 16 aging Foxboro 762CNA-AT controllers (as well as some other process displays) with something more modern.
The setup is as follows:
There are 8 water filtration basins, each one having two Foxboro controllers. One unit controls effluent flow through that filter (either manually in GPM, or in automatic mode distributing the influent flow evenly across all active filters). The other Foxboro unit manually controls a common backwash valve (all 8 backwash units control the same valve) supplying backwash water to the filter set. (Backwash is done manually, one filter at a time.)
There are also two 7-segment LED displays for each filter, showing effluent turbidity and head loss.
They have asked me to replace all this with something more modern, because the Foxboro controllers are dying frequently, requiring $1000+ repair bills each time.
I've found some units like the MicroMod 53SL6000 units, which look very similar, and may provide a drop-in solution, and there are other multiloop controllers available, but it may be more preferable to go with a PLC-based system and replace the controllers and displays with a single touchscreen at each filter. I've had good luck with the inexpensive AutomationDirect CLICK PLC series, and the Kinco 10" touchscreens seem to work well while being very reasonably priced.
I would welcome any suggestions or ideas on how to approach this.
Thanks!
The setup is as follows:
There are 8 water filtration basins, each one having two Foxboro controllers. One unit controls effluent flow through that filter (either manually in GPM, or in automatic mode distributing the influent flow evenly across all active filters). The other Foxboro unit manually controls a common backwash valve (all 8 backwash units control the same valve) supplying backwash water to the filter set. (Backwash is done manually, one filter at a time.)
There are also two 7-segment LED displays for each filter, showing effluent turbidity and head loss.
They have asked me to replace all this with something more modern, because the Foxboro controllers are dying frequently, requiring $1000+ repair bills each time.
I've found some units like the MicroMod 53SL6000 units, which look very similar, and may provide a drop-in solution, and there are other multiloop controllers available, but it may be more preferable to go with a PLC-based system and replace the controllers and displays with a single touchscreen at each filter. I've had good luck with the inexpensive AutomationDirect CLICK PLC series, and the Kinco 10" touchscreens seem to work well while being very reasonably priced.
I would welcome any suggestions or ideas on how to approach this.
Thanks!
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