Roller shutters steering with (negative) -24V DC

[esde]

Hello,

First of all I would like to thank you for your hardware. Works perfectly and it pretty much powers my house now (with help of ESPHome) Good job!

Now, my challenge is to manage roller shutters. I do have a separate hardware that contains relays and I would like to use it because it has built-in safety features. The problem is that the coils are managed using a -24V DC. Please note the minus there. So, to open, or close a shutter I need to connect the wire that's coming from the relay module to -24V DC. Meh.

What would be the best way to achieve it? If possible I would love to refrain from using another hardware in between the board and the relay module. Maybe is there something on your product list that could be used for this? I would need 32 channels (16 up, 16 down). If not, what would be your suggestion?

Thanks!

[admin]

i think you can use A32 Pro or A32 or KC868-H32B Pro relay controller. These models all are 32 channel relay version. just A series board made by ESP32 , so that can use ESPHome with home assistant. H32B Pro use by Tuya app support voice control by alexa or google home speaker. Because all our prudoct's relay is dry contact output, so if you want output -24v, just let relay's COMOM port connect with your -24v power supply.

[esde]

Right. I was thinking about it, but didn't like that much the idea of having a relay to control a relay and was searching for options that do not require to use mechanical parts to achieve the same.

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I think I'll just take the bullet and order KC868-A32. This should definitely do the job. Thanks!

[admin]

ok, A32 have COM,NO,NC ports.