Profilux 4 vs. Jebao RW8

[LC8Sumi]

Hello!

Is it allowed to control a Jebao RW8 with the P4 via L ports?
I mean with a voltage divider (for example two 4.7k resistors) to make it 0-5V?

Will this void warranty and/or fry the L port?

Thanks!

[MatthiasF]

Hi,

You would need a pump controller, that has support for external 0-10v interfaces. The L-ports have a rated current max of 20 mA and are not meant to drive a pump directly.

[LC8Sumi]

Hello!

I didn't mean to drive the (24V ~1A) pump with the L-ports, only to control it, like a Tunze pump. The Jebao takes a 0-5V signal as a control signal, and was thinking that by using two resistors with the same value it would be possible to divide the 1-10V to 0.5-5V. That's how I've used it on my previous controller (not GHL, it was an Arduino & an RC circuit).
I just don't know if the current that it takes for controlling is higher or lower than 20mA, but I guess if it didn't blew the arduino, then the P4 would also be fine with it..
I understand it's a poor quality pump & because of that it doesn't fit the GHL point of view of quality, so it might be the best to swap it for a Tunze at least, especially if hooking it up to the P4 like such would void the warranty.

[MatthiasF]

I'm sure you can use this pump.
You can configure the minimum and maximum voltages for each interface seperately without having to use a voltage divider.

See this screenshot of GHL Control Center->1-10V-interfaces:
0.jpg

[LC8Sumi]

Thank You very much!

I already have the voltage divider soldered in the wiring, so I'll just transfer it from my old controler as-is, and hope for the best

[courlet]

But how would you get the control over the Jebao pumps? I have RW20 pumps with each a controller but without any option to transfer the lead to a separate controller.