Accessory Project for powering air solenoids

[Jim Agnew]

Has anyone developed an accessory project for the AM-1S, that can control an air solenoid? If so, I would appreciate knowing what logic was used. Thanks.

[G8B4Life]

No one's posted anything like that here but it does sound like a cool project, and something I had though about before; though not specifically with RailPro as the control system.

If I may ask, what's the use case? If your thinking of throwing points (switches for most of you) you might be better off using the plain AM-1 and not the 1S as the plain version is designed for turnout control and the 1S is not. What the actual internal difference is I don't know but it's how Ring sells them.

If you post the the air solenoids you plan to use we might be able to make some suggestions for making a program.

- Tim

[Jim Agnew]

The “S” is my mistake. I currently am using the AirWire Linker and Activator to throw 5 air powered turnouts on my garden layout. Since I’ve converted some of my engines to Railpro, I’d like to eliminate the need for the AirWire controller.
I’ll see if I can get the specs on the solenoid.
When I asked Ring, they replied that someone had informed them that they had in fact accomplished what I wanted to do.

[Jim Agnew]

https://www.clippard.com/part/ET-3-12

[G8B4Life]

Ok, so normally if your using the plain Accessory module you shouldn't need to write a program, it'll come set for you use for turnouts and you just need to define the type of point machine (switch machine) you are controlling. However, this sounds like a non normal case so how does it work for you currently? Does energising the solenoid throw the points and de-energising the solenoid restore the points, or does it work some other way (a diagram would be really good if you can do that)?

- Tim

[Jim Agnew]

Energizing the solenoid opens the valve to allow air pressure to throw the points, unenergizing the solenoid closes the valve and allows the air pressure to escape the solenoid through the 3rd port.

[G8B4Life]

Ok, so energising the solenoid throws the points one way, how do the points return to the other position when you de-energise the solenoid? Return spring? Energising another solenoid to throw the points back?  Whether you have to keep the solenoid energised to keep the points thrown and how the points return the non thrown position will determine whether you can use the standard turnout program or have to write another program.

- Tim

[Jim Agnew]

Points return by spring pressure in the air cylinder. My project is now on hold due to the fact that I somehow managed to screw up the AM-1, can’t connect with it (red target). I had a lose connection due to the spring terminal and this must have been enough to damage it. Will be ordering the AM -2 when available.

[Jim Agnew]

Wow, I didn’t screwup after all. I have 3 AM-1’s on the HC and I was trying to access the wrong one. The HC assigns duplicate turnout numbers???

[G8B4Life]

Wow, I didn’t screwup after all. I have 3 AM-1’s on the HC and I was trying to access the wrong one. The HC assigns duplicate turnout numbers???

In the manual it shows you to name them so I'm not sure why they are numbered.

Anyway, This is the scenario. I do not believe that the AM-1 program that controls turnouts allows for the turnout buttons to be maintained instead of momentary and does not allow a forever activation time. At least that's what I get from reading the manual. If that's the case your options are:

Lobby Ring to allow a forever activation time for solenoids that can handle being energised all the time, which I suggest you do, and

Create a program for use in the meantime, which is probably going to be a very long time, possibly forever.

Because one can't simply share accessory programs and only you know your layout and where the turnouts are you'll have to make your own in RailPro Assistant. The below example should get you started on what you want. I'd suggest grouping the turnouts into area's for naming the project, and naming the AM-1's the same. Remember, this way you will not find the AM-1 under Turnouts on the HC anymore but they'll appear under Accessories.






- Tim

[Jim Agnew]

Thank you, that’s what I needed. I’m I correct in assuming output equals the terminal number on the AM-1?

[G8B4Life]

Yes, with additional information.

Output 1 and Output 2 are Motor 1
Output 3 and Output 4 are Motor 2
Output 5 through Output 8 are Output 5 through Output 8.

Look at the AM-1S or AM-2S manual under Wire LED's or Wire Light Bulbs to see how you should wire the solenoids. I don't think there's any reason you probably couldn't use the motor outputs as well as long as the solenoids aren't polarity sensitive.

Also, the max current the AM-1 is rated for isn't specified but the max current the AM-1S is rated for is only 400mA continuous combined across all outputs; just something to be aware of.

Another thought, if it doesn't quite work out because there's not enough grunt to power the solenoids directly:

• You could use the turnout program in the AM-1 to drive latching relays (push the button to turn on, push the button again to turn off) to drive the solenoids.
• You could drive normal relays from the project you write to drive the solenoids.
  

It's more money etc but it could be a last resort to provide enough grunt.

- Tim

[Jim Agnew]

Couple more questions, if you don’t mind.
Once the project is downloaded, is it no longer available for editing and must be recreated from scratch?
I’m getting a message that my project name can’t be associated with a picture?