RO/DI automation with GHL

[CEReefer]

@Lasse I really loved the programming thread with the multiple solenoids this week, and gave me some thoughts.

I am trying to automate my RO/DI station, in a much easier way (simple on/off based on float switches). But I want to integrate an automatic TDS monitoring system. Using this. Now this monitor, sends signal in 4-20 mA format, applying a 500 ohms resistor, you convert that signal into a 2 (yes 2!)-10v.

Is there a way with an ADIN card to make sure that if the Profilux detects a voltage above 2 it gives an alarm and prevents the solenoids involved with making RO/DI from opening?

 

[CEReefer]

Because obviously I don't want a container full of water with more than 0 TDS

 

[Lasse]

Yes I think it is possible. The Add in chard have two 1-10 V channels. When you install this card - this two sensors show up

Here you can decide a nominal value (when your TDS increase or decrease a certain value). You can also knit it to a PL or switch channel

Sincerely Lasse

 

[CEReefer]

@Lasse this is amazing! They should hire you at GHL! ;)

 

[kw1816]

How did you get on with this ? I’m interested in doing something similar, would be good to know if you got it working :)

 

[CEReefer]

Working great, TBH

 

[n1ng]

Bumping an old thread. Does know which pins correspond to voltage 1 & 2? Thanks!

 

[Macca_75]

Bumping an old thread. Does know which pins correspond to voltage 1 & 2? Thanks!

https://www.reef2reef.com/threads/digital-input-pl-adin-card-usage-example.273773/