Pneumatic Wiring

[TenaciousDrones]

So I'm posting this in the electrical and pneumatics sections because I'm not quite sure which would be better. My team just got two AVS-5212-24D solenoids from AutoMation Direct so that we could get a higher flow rate from them. We got them in the other day and we got them hooked up and they work perfect but our problem is that we are slightly stumped about the wiring. It's a 24V single-solenoid that has a DIN-style plug. It's connector has 2 black wires, DC+ and DC-, and it has one yellow/green wire that is the ground. If anyone has any ideas it would be greatly appreciated. Thanks ahead of time.

Here is the link to the part.

[Al Skierkiewicz]

Sorry to start off with this..
R77
The only pneumatic system items permitted on 2014 FRC ROBOTS include the items listed below.
C. Solenoid valves with a maximum 1/8 in. NPT port diameter

You linked a 1/4" valve.

[FrankJ]

Ground is not connected. 1 is +24. 2 is 0v

You can get the same series valve in a legal port size. Alas with a lower Cv

[Al Skierkiewicz]

OK,
I got called away so I am back now, sorry about that. The green yellow wire is a safety ground for use when the valve is installed in a way that could potentially contact a hazardous voltage. This is used to keep the body of the valve at ground potential. Since your robot has no ground reference, it will not be needed in this application. The two black wires must be connected to a switched 24 volt output. To use the solenoid module, look at the side for a equivalent circuit. You need to supply the battery power (+24 volts in your case) from the cRio power supply to the module. You will use both a red and black wire with the red going to the V supply terminal and the black going to the common terminal. Then select which output use want to use to control the valve. When that output turns on, an LED will light and the internal relay will close supplying +24 and common to the valve.

[boschwah]

Originally Posted by Al Skierkiewicz

Sorry to start off with this..
R77
The only pneumatic system items permitted on 2014 FRC ROBOTS include the items listed below.
C. Solenoid valves with a maximum 1/8 in. NPT port diameter

You linked a 1/4" valve.

Good call Al, but no worries, just a bad link. we've got the avs-5211, it's rated at .67 Cv which should be enough for our application.

Please let me know if I understand your description of the wiring correctly. I takeaway that the solenoid breakout is wired via wago to the same 24v black terminals on the PDB as the cRIO, so that 24v reach the breakout. Then the black signal wires from the solenoid itself are connected to a particular port on the breakout to transmit that signal. My description is not as eloquent, but please let me know if we got this right.. Thanks..

[Alan Anderson]

Originally Posted by boschwah

\I takeaway that the solenoid breakout is wired via wago to the same 24v black terminals on the PDB as the cRIO, so that 24v reach the breakout.

You shouldn't actually use the same terminals for both. The 24v output on the Power Distribution Board has four connections. 24v is present on two of them, and common is on the other two. You can wire the first pair of connections to the cRIO, and the second pair to the Solenoid Breakout.

[Al Skierkiewicz]

Bosch,
Alan has suggested the method most teams use to get the +24 volts to the module. You can only use one module this way for 24 volt solenoids. The PD power supply was not designed to feed the cRio and other loads. If you use the FIRST breakout, the spacing is the same as PWM connectors. You can make your own with just two position blocks instead of the three position for PWM lines.

[boschwah]

Thank you very much gentlemen... you've been a great help.