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TOPIC: Modbus Relay Board and RGBIO8

Modbus Relay Board and RGBIO8 3 years 2 months ago #431

  • pjnowak1213
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Does any one now of a compatible relay board that works with the RGBIO8?

I see that they are out of stock here.
www.widgeneering.com/boards/modbus-rs485...ort-relay-board.html

Also with the RGBIO8 can I use that with they Phoenix board and have it work with they 12 volt outputs on the board meant for they valves?
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Modbus Relay Board and RGBIO8 3 years 2 months ago #433

  • adam
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What you need is a high trigger relay board, you can get them on amazon pretty easily.

Something like this:
www.amazon.com/GEREE-8-Channel-Module-Op...nel+12v+relay+module

However, you don't need a relay board for 12v items like valves, they can run direct from the outputs.

And yes, the RGBIO boards work fine with the Phoenix!
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Modbus Relay Board and RGBIO8 3 years 2 months ago #436

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Thanks. Sorry for my lack of knowledge here, but how do I hook that up and get it to work with the RGBIO8? I thought that the RGBIO8 is using a RS485 for connection and that you daisy chain them together?

Does the RGBIO8 talk back to the Phoinex and tell it what to turn on and off?
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Modbus Relay Board and RGBIO8 3 years 2 months ago #437

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Ok, I'll back up a little...

RGBIO is an I2C board that daisy chains along with your LCD controller and PID displays. It gives you 3 way switches and RGB led indicator connections for every output on the board. So it doesn't get "connected" to the relays at all.

BrewTroller boards have outputs.. the Phoenix has 20 of them, that provide 12v signals to control devices (some of the older boards used a low trigger or ground sink) So a relay board like I linked would connect a channel on the relay board to an output on the BrewTroller. The brewtroller would turn the relay on and off.

The RS485 board you linked to on Widgeneering is an expansion board. It provides more outputs for the BrewTroller to use, and it uses the RS485 protocol. That is different than the RGBIO (which is I2C)

Does that help?
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Modbus Relay Board and RGBIO8 3 years 2 months ago #438

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Ok, I think I got it, so for the Phoenix I need to hook up my pumps and gas valves through the relay board and then to one of the 12v outputs on the Phoenix. They other valves can hook up right to the Phoenix. Then I hook up the RGBIO8 the way you described.

Thanks for your help.
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Modbus Relay Board and RGBIO8 3 years 2 months ago #439

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Yep, any 12v item like a valve can be run from the output directly up to about 100ma, your gas valves and pump are likely 120v, so you would need the relay in there. You can also use SSRs if you want.
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