wiring a raspberry pi and 8 port relay station

[kimbhoot]

Hi,
I have the software part configured on my Raspberry pi model B with two 4 port relay modules. Now time to swap out my Hunter controller with this one. I’ve attached a pic of the existing wiring and you can see there’s a rain sensor wire and several wires going to the DC 24v ports! Also, there’s a master valve as well. The zone wiring is straight forward but what do I do with the other wires?
->Rain sensor
->Master valve
->power

Thanks.

Attachments:

1. 

   20170929_231746.jpg
   

[Ray]

It’s hard to tell from the picture which are the wires that go to the 24VAC port. The transformer wires should go there at least. Then the rain sensor may be a type that’s powered by 24VAC (especially if you have a wireless rain sensor). Again, from the picture it’s kind of hard to tell, but you can use a multimeter and its conductivity measurement to figure out which wire goes where.

[kimbhoot]

Hi Ray,
I was actually trying to understand the mapping of these wiring to my diy R-Pi. So I connected all the zone wires to the relay ports (3rd port on each relay module). From the pic on the post above, you can clearly see that 2 white wires going to one of the 24V ports and a red+white wire goes to the other 24V port. I took the 2 white wire and plugged in on the middle port of a relay module, wired the red+white to the C wire. Tried to fire off that port but didn’t work. How do I wire the power onto the relay module?

[Author]

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