Analogue output : convert to Digital ?

[Sungray]

Hi there,

Simple question, is there any way to use an analogue output as a digital output ?

My point is to connect my ventilation system (Renson C+ Evo II) to Loxone, but I'm out of digital outputs. (I need 4 outputs, got 1 left)

Thanks !

[Duncan]

do you mean as a relay switched output? get a solid state relay and connect it to the 0-10v output which can deliver 20ma - more than enough to drive an ssr

make sure you get the correct ssr though - most are designed for AC and these ones wont switch DC, but DC ones are available if thats what you need

[smartbusinesstools.be]

We use these bi-stable relays on analogue outputs: http://www.smartbusinesstools.be/shop/product/double-switching-relay-283?category=20&page=2

It switches on at 10V DC (or any other higher DC or AC) and has a very low power consumption.

[Sungray]

Would this work ?

http://www.sainsmart.com/sainsmart-8-ch-ssr-5a-dc-dc-5v-220v-solid-state-relay.html

[Duncan]

the sainsmart one should - its dc to dc, you would just have to set your 0-10v to output 5v as the 'on'

[Ian Norton]

I blogged about my experiences with this here:

https://hackaday.io/project/4857-commercial-home-automation/log/20852-squeezing-a-quart-into-a-pint-pot

Hopefully that will provide some additional info to your choices :-)

Regards, Ian.

[Yannick Kalokerinos]

Hi Sungray. I would be interested in your findings when connecting the Renson to Loxone.

What aspects of the unit do you want to control.

We are going to install the Rensons E+ Endura which is essentially a C+ II evo system and a heatpump.

[Sungray]

Thanks ! I've read it, very interesting.

[Sungray]

Well the point is basically to do the same thing as the command switch. There are 4 modes : eco, normal, night and boost, which I want to be able to select through Loxone. I also want, for instance, if the temperature in the sleeping room is more than 25°C, and the external temperature is lower of 2 degrees or more than the internal temperature, switch mode to boost to cool down the house.

Also there's the wife factor, I don't want to have to get up in the middle of the night because the wife says the ventilation is too loud and I have to go below to use the switch to go back to a quieter mode.

I will update once I have received the relay in June I guess. Hopefully it will work :).

[Sungray]

Thanks I've read it, very interesting. :)

Le vendredi 20 mai 2016 07:34:41 UTC+2, Ian Norton a écrit :

[Simon Still]

On Thursday, 19 May 2016 08:25:51 UTC+1, Sungray wrote:

Hi there,

Simple question, is there any way to use an analogue output as a digital output ?

I've used some relays pre mounted on a board with DIN Rail adaptors - search for "relay din rail" on eBay.  They ship from Hong Kong so take a while to arrive but area available in 5V and 24V versions and work out cheap (they allow best offers and always seem to accept a few £ lower)

  

[Yannick Kalokerinos]

Great, looking forward to hearing from you. 

Are you located in Belgium as well?

[Sungray]

Indeed I am. :)

[Sungray]

Alright, so I've received the SainSmart 8 Channel SSR 5A DC-DC 5V-220V. http://www.sainsmart.com/sainsmart-8-ch-ssr-5a-dc-dc-5v-220v-solid-state-relay.html

I don't have much info on it. It's obviously chinese, no documentation whatsoever etc. but I was able to map the different plots, find the positives and the negative plot.

Unfortunately it doesn't seem to do anything. Unfortunately again I don't have a voltmeter so I'm not able to test it. Maybe I'm missing something. There are 10 input plots. 8 for the 8 outputs, 1 for the ground and 1 for I don't know what. So I've plugged the input/output I needed and the ground. Should I plug anything in the last one which I don't know what it's used for ? +24V maybe ?

Thanks for the help !

[Sungray]

To make it more clear, check the attached screenshot.

Should I plug anything in the '?' plot ?

[Neil]

Sungray

I think it needs to be connected as follows

Your analogue outputs from Loxone need to connect to the screwed paired terminals at the top of the picture. There is a pair (2No) terminals per relay which will carry your 5v  analogue output from Loxone and drive the channel on. As a result of the channel being driven on the output from the channel (equivalent to an old style relay closing) will switch on the equivalent of a digital output.
The terminals numbered 1 - 8 represent the eight outputs from the respective channels. Given these outputs will generally switch a 220V component like a light, central heating zone valve, boiler, pump etc the - would be a neutral wire and the ? would be 240v.

The reason it is marked ? is that it could be anything up to 220v (not sure if a 240v UK voltage would be an issue) but it could for example be switching 24v zone vale actuators or 24v window opening motors. I am following this thread with interest as I may use these SSRs to control heating and window opening for summer cooling.

I would be interested to hear the views of others on the Forum to see if my explanation is correct as to be honest I am not 100%. I just have some doubt on the - connection but as stated above I think it's sort of "common" output which could be a ground if 24v or neutral if 220 / 240v.

It seems the PCB itself does not have a supply in itself but simply the analogue inputs (outputs from Loxone) simply drive the channels on.

I hope all this makes sense!!

Neil

[Duncan]

dont forget this is a dc ssr - so dont connect the outputs to switch any ac supply of any voltage

its capable of switching a dc voltage of between 5v and 220v

[Neil]

Thank you Duncan for clearing that one up in terms of what load this SSR can switch so for anyone reading this thread in the future please ignore my reference to the neutral and 240v AC loads!!. However it can still be a useful way of using spare Loxone analogue outputs to switch on certain actuator types.
Neil

[Duncan]

the manual is at:

https://s3-ap-northeast-1.amazonaws.com/sain-amzn/20/20-018-959/8+solid+relay.zip