tunze controllable pumps

[Bryan]

I think the only capability the RA would be able to do is send settings to the 7096 to program it. To contriol the pumps with the RA would require a fair bit of hardware additions. The tunze are not contolled by PWM, and use a variable DC voltage I believe.

So yes if you want the fancy customability for the tunze you would need a 7096. That's assuming you are using a controllable Tunze pump. 6080 and 6060 are AC not DC.

[reefer]

Is there any easy way to get variable DC voltage from RA to control my LED and Tunze pumps?

[rimai]

Simply add a resistor and a capacitor and you got yourself a variable DC channel.
You may want to read through this thread: http://forum.reefangel.com/viewtopic.php?f=3&t=162

[rimai]

Ok, so after some digging, I came to the conclusion that it is in fact very easy to control tunze pumps.
All it needs to be done is convert PWM to analog and feed it to pin #1 on the DIN5 connector.

[rimai]

Actually, it seems that they accept PWM straight up.
If this is correct, by just feeding the boosted PWM to pin #1 and using pin #2 as ground reference, one could control them.
I need to get me one tunze pump to verify.

[cain]

Actually, it seems that they accept PWM straight up.
If this is correct, by just feeding the boosted PWM to pin #1 and using pin #2 as ground reference, one could control them.
I need to get me one tunze pump to verify.

i can't wait...

[rimai]

correct

[cain]

correct

means it can be controlled?
i need the pwm epxansion module for this?
hopefully they're not on back order.

[rimai]

Yes, you need the PWM expansion module if you don't want to use the standard 2 channels.
I don't know if it can be controlled by using PWM yet. I'm hoping Bryan can help us out and test really quick when he has some time

[cain]

Yes, you need the PWM expansion module if you don't want to use the standard 2 channels.
I don't know if it can be controlled by using PWM yet. I'm hoping Bryan can help us out and test really quick when he has some time

ok, i'll wait then. TY.

[Bryan]

Later tonight I will first scope the outputs of the Tunze controller and see what it.

[Bryan]

Roberto:

Ok, here is the scope results from my 7091 controller. The minimum running voltage for the Tunze is supposedly 30%, which seems to jive with the scope at 3.9v. What is odd is the Full ON voltage was only 7.3, thought it would be 10v, perhaps it's my controller. Would have thought full power would be 10v

The pics should be self-explanatory. Does this help.?

[rimai]

Nice!!!
Thanks Bryan!!!
Just to confirm:
Pin 1 - PWM signal
Pin2 - GND
Is it correct?

[rimai]

Oh, and to explain your question, with PWM signals, the receiver (pump in this case) usually doesn't care how much voltage the controller is sending.
Meanwell drivers are an exception though. They actually built it so it does matter. My theory is that they wanted to make convertion between D and P very simple, so the core electronics actually checks analog signals, instead of just PWM.
So for the receiver, what matters is how long the "Pump On voltage" in your design, stays at that level.
I'm guessing the pump only looks as if is it above 5V or below 5V to determine 0 or 1 binary state.

[Bryan]

Oh, and to explain your question, with PWM signals, the receiver (pump in this case) usually doesn't care how much voltage the controller is sending.
Meanwell drivers are an exception though. They actually built it so it does matter. My theory is that they wanted to make convertion between D and P very simple, so the core electronics actually checks analog signals, instead of just PWM.
So for the receiver, what matters is how long the "Pump On voltage" in your design, stays at that level.
I'm guessing the pump only looks as if is it above 5V or below 5V to determine 0 or 1 binary state.

Hi Roberto:

I don't think I explained myself and should have documented the scope picture better, but from the picture of the 7091 there is three knobs, Pulse, power1 and power 2. Pulse sets the duty/switching rate between power 1 and power 2. Power 1 setting is between 30-100% in voltage. Power 2 is the same 30-100%. (tunze pumps can't be run below 30%). So in summary the pump will run at 100% for

So from the scope pic Power 1 is on for roughly 2.5 seconds (Pump On time in picture) and at a voltage of ~7.5v (was set to MAX for the test), then it switches to Power 2 for approx 1.75s (Pump Off time in picture) for a voltage of ~3.9v (was set to MIN for the test). Not sure how u would use PWM to control this. Basically the driver needs a voltage from the controller at 0-10v, although my 7091 peaks at around 8v, so I may have that point wrong.

So in summary what u are seeing on the scope is the pump running at full power for 2.5 seconds and then at minimum power for 1.75s. Full power being 7.9v and low power being 3.9v.

Hope this helps

[Bryan]

Nice!!!
Thanks Bryan!!!
Just to confirm:
Pin 1 - PWM signal
Pin2 - GND
Is it correct?

Sent PM

[Bryan]

So in summary what u are seeing on the scope is the pump running at full power for 2.5 seconds and then at minimum power for 1.75s. Full power being 7.9v and low power being 3.9v.

Hope this helps

Just to add, if I set the power 1 and power 2 knobs to MIN for both the scope would displaya flat line at 3.9v, if set to MAX for both Power 1 and Power 2 the scope would display a flat line of 7.9v.

So if the power 1 and power 2 are set identical there is no switching that takes place between the pumps, as they are running at identical voltage..

[rimai]

Thanks Bryan.
I now understand how they work and I can say for sure it is not PWM, but analog signal.

[Bryan]

Yup, afraid so, so don't think it would be a easy task on the existing RA hardware.

[rimai]

Oh no, it's still pretty simple.
All we need to do is smooth down the PWM signal.
We already have 0-10VDC PWM signal.
The cable assembly only needs a resistor and a capacitor, which is fairly simple to do.

[rimai]

tunze pinout.png (187.68 KiB) Viewed 6461 times

Tunze pinout

[Xender]

Hi

Do you think I can DIM my TUNZE Nano-Stream 6025 with one of the two PWM channel on the relay box?
Thanks.

[rimai]

I sent a cable to cain to test, but it did not work.
Without having one with me to test what kind of load is being applied by the Tunzes on the RC filter I created, it is hard to find out which values to use.
I tried 1uF and 10K and it did not work.
In theory, all you need is to do is convert the PWM signal to analog and plug it in on the Tunze connector.

[cain]

Hi

Do you think I can DIM my TUNZE Nano-Stream 6025 with one of the two PWM channel on the relay box?
Thanks.

NO, since a 6025 is not controllable.

[Xender]

thanks cain

[symon_say]

Have anybody found a solution to control tunze pumps??

[rimai]

I can give it another try.
My last attempt was unsuccessful, but I'm pretty sure I know how to fix the problem now.
PM me if you would like to test the module?

[hylik]

i maybe interested on this module too if it become available

[bluwinghawk]

following

[rimai]

Ok, so I got ahold of a Tunze
I was able to control it this time!!!
Requires the analog dimming version of relay box.