PWM to Analog

[jedimasterben]

Hello all,

I have a PWM RA. My relay box has the jumper inside to switch Analog/PWM, like this:


(that's where the jumpers started off at)


I don't believe that the PWM has the extra circuitry to do analog, as well, or does it? And if it does, I just move the jumpers to 2 and 3 on both instead of 1 and 2?

I want to control my two Tunze pumps and don't want to have to have another relay box

[rimai]

Yes, the label is actually wrong.
Should be PWM/Analog.
So, if you move them to 2-3, you will change the signal to analog.

[jedimasterben]

Yes, the label is actually wrong.
Should be PWM/Analog.
So, if you move them to 2-3, you will change the signal to analog.

AWESOME! So do all RA now have this and future users don't have to choose between the PWM/0-10v?

I'm so happy - now I can control my two Tunzes directly and get rid of my controller I just bought for them... LOL

[rimai]

Only relay boxes Rev 8.1 can do that.

[jedimasterben]

Only relay boxes Rev 8.1 can do that.

Of course, but I'd imagine only 8.1 will be sold going forward.

[rimai]

Yes

[jedimasterben]

Ok, so I have the jumpers set to 2/3 on both of the sets of pins. I have the code inserted in my RA to control both channels, and I'm measuring the voltage change as the RA sends out the 0-10v signals, but the powerheads are not responding. I thought maybe my wiring was backwards (pins 4 and 5 on the DIN connector), so I flipped it around, and they still won't change from 100%. When I plug the Tunze 7096 controller back in to them, they cycle up and down.

Any ideas? I'm measuring the voltage going all the way to the pins on the DIN connector, so the voltage is getting to the powerheads' little control box bits.

[rimai]

I think it is 1-2 and not 4-5

[jedimasterben]

I was going by this post here:

tunze pinout.png

Tunze pinout

EDIT: sorry, the quote didn't work right. This post: http://forum.reefangel.com/viewtopic.php?p=2616#p2616

[jedimasterben]

Do you think that the PCB could be properly labelled, and it was already set to Analog?

[rimai]

I found that tunze pinout on google. The original author may have it wrong.
The picture above is set to PWM signal. As I said in the previous post, the label is inverted. It should be PWM/Analog instead of Analog/PWM.
The rev 8.1 of the relay box is soon to be no more, so there is no point of changing/correcting anything.

[jedimasterben]

Ok, just checking on that.

Do you know which pins the Tunze cable for the RA uses?

[rimai]

That's what I said before.
I think it is 1-2.
http://i761.photobucket.com/albums/xx25 ... 4c3679.jpg

[jedimasterben]

And that is the missing link! You're the man, Roberto!

[jedimasterben]

Well, sat down to make that change and... no dice. Wired it exactly like yours above (mine is different since it is prewired, but I used a multimeter to confirm continuity.

Tried it with two different wires and two different Tunzes, and both had no change in their speed (controller is currently at 63 and 76%, and output voltage is spot on).