Anyone Have aRS485 Daisy Chain Wiring Example they can share?

[sjames99]

I understand the concept of daisy chaining the devices, but have never done it when you have more devices than terminal blocks. So in this case 5 devices and 2 blocks. I am not a wiring expert, border on an intermediate one 😄. I was hoping someone had a photo of their aqualink wiring with a daisy chain as the diagrams are just clouding my mind and keep second guessing myself. I did try it once and lost all connection to all devices so quickly reverted it last year.

[sfeakes]

I don't have any pic's. But it's as simple as putting both sets of wires into the device terminal block. So would look like.
The picture in the wiki is also a good depiction. https://github.com/sfeakes/AqualinkD/wiki#RS485-adapters

Panel Terminal Block -------- Device #1 Terminal Block -------- Device #2 Terminal Block.

(Device # 1 simply has 2 sets of wires in it's terminal block.)
As opposed to below where the panel terminal block has both sets of wires.

Panel Terminal Block 
                   |-------- Device #1 Terminal Block 
                   |-------- Device #2 Terminal Block

To use daisy chain, you really need to know which device is terminated though, as only the first and last can be terminated.
Also remember that the 2 panel terminal blocks (if you have 2) are hard wired together, so treat them as 1 (just makes it easier to connect devices.
You can also mix this up if needed if you know what is and isn't terminated.
Below is how my setup looks.

Panel Terminal Block #1
                   |-------- Pentair VSP 
                   |-------- Jandy LXi heater
Panel Terminal Block #2
                   |-------- Haywood SWG 
                   |-------- AqualinkD USB --------- AqualinkD2 USB --------- Jandy Allbutton Keypad

Both the AqualinkD USB's are not terminated, everything else is. (I only have 2 for debugging purposes)

[sjames99]

Thank you!

I have to give it another try, I have six sets of wires coming in to two terminal blocks. I haven't been able to add any additional devices to the first terminal block. Nothing will work if I add another device. So that leaves with four devices on the last terminal block.