Question about relay to ball valve wiring (again)
Posted: Thu Jan 07, 2016 12:19 am
Okay, putting one of my control boxes together finally for a glycol control system, and realizing that I think I misread some of your previous answers. This box will house 2 BCS units with the full complement of 8 temp probes each.
I am using this relay board:
http://www.amazon.com/gp/product/B00M1I ... MUS055KMW5
And these type of ball valves with CR04 valves:
http://www.amazon.com/gp/product/B00Y42 ... ge_o00_s00
I have two of these 110 AC outlets to power the wall wart BCS power supplies that came with the boards:
http://www.amazon.com/gp/product/B00MO8 ... ia_nav_t_2
And this is my 12V DC power supply:
http://www.amazon.com/gp/product/B00GI5 ... ge_o07_s00
So the CR04 valve has a red wire (pwr or +?) and a green wire (gnd or -?). The relay output has 3 terminals for each signal. NC, C1-16, and NO. On the input side there are IN 1-16 with a single GND for each set of eight inputs on either side, and then the common power supply terminals VCC and GND. My 12V DC power supply has 3 output terminals, NC, -, and +. So here are my questions. Forgive me sounding dumb or re-asking questions you fine folks have previously answered. I think I know the answers to some, maybe even most of these, but I just want to be absolutely sure that I have everything right.
1. Do I connect the + on the power supply to VCC and the - to the GND terminals in the middle bottom of the relay board? NC on the power supply stands for "not connected" in this case, not "normally closed", correct?
2. Someone earlier mentioned making sure that "you tie the power supply grounds together at a common ground point". Since my two AC outlets have aux output terminals, if I simply run my 3 prong AC cord into the box and pass through each of those two with N, G, L and then terminate at the DC power supply, would this meet the requirement of having all the grounds tied together?
3. Here's an obvious one, but I'm paranoid so gonna ask anyway. OUT0-OUT7 on each board are wired to IN1-16 on the relay and each of the GND terminals next to the IN terminals on the relays gets connected to one of the black GND terminals on the BCS board, right?
4. And this is the one I am confused about: How to wire the ball valves to the relay outputs. What exactly are the C1-C16 terminals for? I know I want the red wire hooked up to the NO terminal to get my valve to open when the relay is triggered, but I was thinking that each green wire would go to one of the C1-C16 terminals before and now in re-reading JonW's answer to one of my questions I think I was wrong and they actually need to be all bunched together and connected to the ground (or -) on the DC power supply. I am using terminal blocks I can jumper them together, but then do I have wires going in the the - terminal on the power supply both from the ground on the power input into the relay and the return wire from the ball valve? Or do I run the green wires bunched together from the ball valves (after connecting them into one wire via the terminal blocks) back into the GND terminal on the relay board next to VCC? Is there a difference or is that terminal and the - on the power supply? And the only terminal that I am using on the relay outputs is the NO?
Okay I think that is it for now. Thanks!
I am using this relay board:
http://www.amazon.com/gp/product/B00M1I ... MUS055KMW5
And these type of ball valves with CR04 valves:
http://www.amazon.com/gp/product/B00Y42 ... ge_o00_s00
I have two of these 110 AC outlets to power the wall wart BCS power supplies that came with the boards:
http://www.amazon.com/gp/product/B00MO8 ... ia_nav_t_2
And this is my 12V DC power supply:
http://www.amazon.com/gp/product/B00GI5 ... ge_o07_s00
So the CR04 valve has a red wire (pwr or +?) and a green wire (gnd or -?). The relay output has 3 terminals for each signal. NC, C1-16, and NO. On the input side there are IN 1-16 with a single GND for each set of eight inputs on either side, and then the common power supply terminals VCC and GND. My 12V DC power supply has 3 output terminals, NC, -, and +. So here are my questions. Forgive me sounding dumb or re-asking questions you fine folks have previously answered. I think I know the answers to some, maybe even most of these, but I just want to be absolutely sure that I have everything right.
1. Do I connect the + on the power supply to VCC and the - to the GND terminals in the middle bottom of the relay board? NC on the power supply stands for "not connected" in this case, not "normally closed", correct?
2. Someone earlier mentioned making sure that "you tie the power supply grounds together at a common ground point". Since my two AC outlets have aux output terminals, if I simply run my 3 prong AC cord into the box and pass through each of those two with N, G, L and then terminate at the DC power supply, would this meet the requirement of having all the grounds tied together?
3. Here's an obvious one, but I'm paranoid so gonna ask anyway. OUT0-OUT7 on each board are wired to IN1-16 on the relay and each of the GND terminals next to the IN terminals on the relays gets connected to one of the black GND terminals on the BCS board, right?
4. And this is the one I am confused about: How to wire the ball valves to the relay outputs. What exactly are the C1-C16 terminals for? I know I want the red wire hooked up to the NO terminal to get my valve to open when the relay is triggered, but I was thinking that each green wire would go to one of the C1-C16 terminals before and now in re-reading JonW's answer to one of my questions I think I was wrong and they actually need to be all bunched together and connected to the ground (or -) on the DC power supply. I am using terminal blocks I can jumper them together, but then do I have wires going in the the - terminal on the power supply both from the ground on the power input into the relay and the return wire from the ball valve? Or do I run the green wires bunched together from the ball valves (after connecting them into one wire via the terminal blocks) back into the GND terminal on the relay board next to VCC? Is there a difference or is that terminal and the - on the power supply? And the only terminal that I am using on the relay outputs is the NO?
Okay I think that is it for now. Thanks!