I thought it was the relay but I got a second one and replaced it, but same behavior. They always get recognized by ST.
When I set it up with NO in Konnected, ST triggers an alarm that smoke was detected. I have to set it “Inverse” so ST clears the alarm. However, when I test the alarm in First Alert, it dos not trigger in ST.
When I set it up as NC(Konnected also set to inverse otherwise ST also triggees the alarm), ST sees the sensor and it is clear (not triggered), but when I test in First Alert, ST does not trigger it either.
I currently set up the relay for both (my cable has 4 wires). I set port 2 to NC and port 6 to NO. Regardless of what I do, neither triggers the alert in ST when testing from First Alert.
Here are some pictures although not sure how well anyone can identify but let me know if this helps. You can see 2 pictures on the relay, the one connecting ting to First Alert detectors and the ones connecting to the cable that goes to Konnected panel, currently using both NO and NC and ground, and 2 pictures on the cable that goes to Konnected panel, you can see that one goes to zone 2 (NC) and one that goes to zone 6 (NO). Also a picture of the Konnected setting.
The wiring looks correct, although you only need to use either the NC or NO connection to Konnected, not both. I recommend using the NC (gray) and COM (brown) wire and connecting those to a zone and G respectively on Konnected.
Are you sure that you are testing the smoke alarm properly? You should just need to hold down the test button until the first one starts sounding, and that should trigger the interconnect.
Do you have more than one of these smoke alarms wired in the series? Do they all sound when you test?
I can’t tell from your pics where the smoke alarm is receiving the onward power or connections to the other smoke alarms along the interconnect. I only see the RM4 connected to one other Black/Red/White wire – is that going directly to one smoke alarm or spliced in a loop somewhere else?
I know I only need one, but since neither worked correctly I decided to connect both and test until I get the correct behavior and disconnect the other one.
The relay is connecting to one of the smoke detectors (I took the wires that the detector connects to and spliced to another cable that connects to the relay, what you see there).
When I test the alarm, all other smoke detectors trigger as well, I have 8 total), includong the one that I used to connect the relay to.
This is why I am at a lost since it does not seem that complicated yet I cannot get it to work.
One thing that you might have noticed is that I have to set both configurations in Konnected to “Inverse”, regardless of it is NO or NC. Otherwise, Smartthings says that smoke have been detected for both. As soon as I set it to Inverse, it clears.
It doesn’t make sense if they both need inverted to show clear. By definition the NO and NC circuits are inverse of each other, so they couldn’t both need to be inverted and report the same state. Something doesn’t make sense here.
By default open means detected and closed means clear. It’s simplest to use the NC circuit and then you don’t have to invert anything.
I’d suggest double-checking your wiring. Also, remove Konnected and ST from the equation and test the NC and NO circuits on the relay with a multimeter to make sure they’re opening and closing as expected.
Did you check that the relay is functioning with a multimeter? It seems unlikely that the relay itself would be defective (twice in a row?).
There are really only a couple hardwired smoke alarm relays on the market. There’s the RM4 for First Alert and BRK brands, SM120X for Kidde, and USI-960 for USI/Universal brand smoke alarms.
I have not yet, will do it later today. However, given that I have to set Inverse for both in Konnected to have it clear, I think it only means that neither cable from the relay (NO and NC) are currently sending any signal, and the fact that when I test also neither one sends a signal to detect, I have to assume that nothing is coming out of the relay ever.
I did check yesterday that the relay was getting power. I will check all connections one more time today (I have checked endkess times) and will test with a multimeter, but I cannot think of something else even if the odds of receiving a second one defective is unlikely.
I appreciate the help and support through this.
It I cannot make it work today, I will likely buy Zooz relay that connects directly to Smartthings through z-wave. If that also does not work, well, it is definitely me and I will take it as a sign to stop trying to integrate it .
A relay by definition does not send a signal. It simply opens and closes a circuit. Internally there’s a reed switch in there and if one side is open then the other side MUST be closed. It doesn’t make sense that both sides are open at the same time.
Disconnect grey, brown, and blue wires, then the put your multimeter on continuity tester mode. Verify that the multimeter is working by touching the two probes together, it should beep/light up indicating continuity.
Now touch the probes to the gray and brown leads (NC). The multimeter should beep indicating continuity. Next, touch the probes to the blue and brown leads (NO). The multimeter should not beep because this circuit is open.
Now, trigger the smoke alarm and repeat the tests. The results should be inverted while the alarm is active.
I did not know the relay did not send signals. Your test helped me find the issue. The relay is working as expected. I connected the relay again to the cables that go to Konnected, and when I tested there was no beep. I thought the cable might have been broken along the path. However, I decided to test with another cable coming form another detector the house had (second owner of this home) that I had removed and it beeped. Long story short, the labels on the 2 cables (basement detector and second floor detector) were switched.
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