ayesijuan1
Member
I am trying to add 4 valves and a pump to an existing RO ststem using an Allen-Bradley PLC 5. I only need discrete I/O to open/close the valves and turn the pump on and off when an existing pump secures or starts. My questions are:
1. Can I piggy back onto an existion I/O such as the existing pump?
2. Can I use one I/O for 4 valves to open/close at the same time?
3. Will I need to us additional physical relays for the new valves and/or pump?
4. Should I use 24vdc or 120vac valves? 110 or 220vac for the pump?
5. What should the ladder logic look like fi when the existin HP pump secures, I want the valves to open and the pump to start and run for say 30 seconds to fill the RO with water and then reset to normal operation? Also, there will ve a hand-off-auto switch added and if the system needs to start while the valves and pump are running, it needs to secure and start it's normal routine.
Thank you,
1. Can I piggy back onto an existion I/O such as the existing pump?
2. Can I use one I/O for 4 valves to open/close at the same time?
3. Will I need to us additional physical relays for the new valves and/or pump?
4. Should I use 24vdc or 120vac valves? 110 or 220vac for the pump?
5. What should the ladder logic look like fi when the existin HP pump secures, I want the valves to open and the pump to start and run for say 30 seconds to fill the RO with water and then reset to normal operation? Also, there will ve a hand-off-auto switch added and if the system needs to start while the valves and pump are running, it needs to secure and start it's normal routine.
Thank you,