Fibaro 2xrelay switching schools 0v (ground)

[webdesco 0]

Has anyone used the fibaro relay module to switch a 0v signal?

The module is powered by 240v

I want the module to interface with my alarm system and wondered if I connect 0v from the alarm to the IN terminal and connect O1 and O2 to two zone inputs on the alarm panel.

I have my smoke detectors and a fibaronrelay door/window sensor integrated with my z-wave controller but no way of setting off the alarm (tried using the envisilink to trigger the dsc alarm panel but can't get it to work). Figured I could use the relay outputs to directly interface with an alarm zone.

[AutoFrank 372]

Hi,

I use a relay to switch a low voltage for my gates and I'm reasonably sure it leverage potential free switching.

My understanding that the inputs/outputs I, O1 and O2 are completely isolated from the mains (240V) feed but it would be better to get Fibaro to verify this

 

I think Peter B had a thread on this type of discussion but it relates to to the UBS and not the relay

Please login or register to see this link.

 

 

-F

[webdesco 0]

Thanks very much for your reply, the spec does imply that they are isolated but you're right it would be good to hear what Fibaro has to say. Do they monitor/reply to this forum or should I post the question somewhere else?

Once again thanks for your reply.

Philip

[AutoFrank 372]

They are on the forum but I have seen few replies

 

options as I see it...

-Monitor other replies

-Post a query in the hardware section of this forum

-Ask the company that supply your devices

[webdesco 0]

Thanks for that, never thought to ask Mark at vesternet, he's pretty clued up. I'll post whatever I find out

Cheers.

[Guest Kuuno]

i confirm it works that way. used many many times

[AutoFrank 372]

Slight variation to this ...

 

Do you know if you can connect the two outputs of a single twin fibaro relay to the same potential free circuit

 

why ??

I have my gate opener operated by one half of the relay

- If I set this as a normal toggle it will open the gate and hold it open. In this mode I cannot close it from the native gate controller.

- I can set the relay to auto-off (current setup) and this allows me open the gate and it will close automatically

 

It would be great to be able to operate the gate in either mode from my HC2 and I could achieve this if I could connect both sides of a single dual relay to the one set of gate opener contacts

 

any do this ? (if this makes sense)

 

Thanks

-F 

[petergebruers 1,268]

The relay has only one "IN" for both relays, and two outputs, Q1 and Q2, that makes 3 connections. As I understand it, you have 2 x 2 connections = 4 connections on the gate opener. Let's call then IN1a and IN1b (gate contact 1) plus IN2a and IN2b (gate contact 2). You have to find out (manual?) if perhaps IN1a and IN1b share in fact a "common ground" (or common supply voltage). In that case, you can connect IN1a to IN2a and "IN" of the relay, and IN1b to Q1 plus IN2b to Q2. Link to the doc of the controller if you're in doubt, I'll have a look.

[petergebruers 1,268]

A word of caution to all. Please be careful, know what you are doing! If you accidentally connect something at "mains" level to circuits that run on voltages < 50 Volt (usually 12 or 24V) like gate controllers, you might case damage and personal injury. Those 12V and 24 V were designed to be safe for user to touch. All equipment should be "double insulated". People assume they are safe to touch. If you connect them accidentally to a live wire, this can kill a person.

[AutoFrank 372]

The relay has only one "IN" for both relays, and two outputs, Q1 and Q2, that makes 3 connections. As I understand it, you have 2 x 2 connections = 4 connections on the gate opener. Let's call then IN1a and IN1b (gate contact 1) plus IN2a and IN2b (gate contact 2). You have to find out (manual?) if perhaps IN1a and IN1b share in fact a "common ground" (or common supply voltage). In that case, you can connect IN1a to IN2a and "IN" of the relay, and IN1b to Q1 plus IN2b to Q2. Link to the doc of the controller if you're in doubt, I'll have a look.

 

Thanks peter, I didn't explain it well enough and I knew this was going to be difficult to explain

I've attached a diagram to help .. hopefully

Please login or register to see this attachment.

[petergebruers 1,268]

Those connections are valid, but I'm not sure if it does what you want. I'm also not sure if you have considered what exactly this circuit does, so please forgive if I'm going to say something you already now. These are the 4 possible states of the relays:

A) Relay one: off, Relay two: off -> controller input "open".

B) Relay one: on, Relay two: off -> controller input "closed".

C) Relay one: off, Relay two: on -> controller input "closed".

D) Relay one: on, Relay two: on -> controller input "closed".

Because B=C=D it does not seem a useful setup. When you transition to A, or from A, something happens. But transitioning between B,C, or D doesn't do anything. Or did I miss something?

Also, why you want to use auto-off on the relay, when the controller can do that? Is it because you want it to function when the controller is down?

[AutoFrank 372]

Those connections are valid, but I'm not sure if it does what you want. I'm also not sure if you have considered what exactly this circuit does, so please forgive if I'm going to say something you already now. These are the 4 possible states of the relays:

A) Relay one: off, Relay two: off -> controller input "open".

B) Relay one: on, Relay two: off -> controller input "closed".

C) Relay one: off, Relay two: on -> controller input "closed".

D) Relay one: on, Relay two: on -> controller input "closed".

Because B=C=D it does not seem a useful setup. When you transition to A, or from A, something happens. But transitioning between B,C, or D doesn't do anything. Or did I miss something?

Also, why you want to use auto-off on the relay, when the controller can do that? Is it because you want it to function when the controller is down?

 

Thanks for the reply and I'm starting to question my logic now

 

the original idea was to to have both options but take your point that I could do that a scene

By doing it at the relay level and using a dual relay I could trigger either condition by selecting one relay side or the other but not both together. This way I can take the controller out of the equation and operate via a physical switch if required.

 

The problem that spurned this issue on the first place was two scenarios

-- If I open the gates and help them open via the native gate controller I could close them via the HC2

-- If I open the gates and held them open via the HC2 I could close them via the native gate controller

The gate is easier to open via the gate controller rather than going into an app

 

I was trying to resolve this and think I can do it via the dual relay idea we have been discussing and have a physical switch on the wall connected to the relay. By having a physical switch on the wall we could use that to open (and either hold open or auto-close) without going through the app. This approach should also work if the HC2 is offline. Everybody at home would then need the new switch rather than the native gate controller.

 

Now that I have talked it through perhaps it's over engineered or over complicated 

....back to the drawing board I think

 

thanks for the feedback

-F

Please login or register to see this attachment.

[webdesco 0]

just as an update to my scenario, got everything working fine, wired the fibaro 2x1.5kw relay module as follows

N - neutral
L  - live
IN - GND from alarm control panel
O1 - to the SD2 Speech Dialler (smoke detector alert)
O2 - Roof access door Relay (activated by the Fibaro door contact switch in the Loft) to Z5 of the alarm control panel (resistor between O2 and IN as it it a normally open contact)
S2 - N/C
S1 - 240v signal from smoke detector relay base station

seems to make sense, O2 will get triggered when S1 goes live from the smoke detector relay base, O1 will get triggered from a scene/PLEG with the logic if roof access door opened and is armed (initially thought I’d just associate the devices, but it doesn’t take into account the armed/disarmed state).

Thanks for your help in getting this working (Mark and the guys from Vesternet confirmed that they are 'dry' contacts isolated from L/N/S1/S2