HC 800 relay and Motorized Projector Screen

[Luis Guilherme]

Does anyone knows if have any problem to use any motorized screen with the hc 800 relays?

Does it possible to have a short circuit from it?

I`m asking that cause my local dealer told me that i should buy a 12v power source to connect to hc800 relay then to my motor!!!!

It doesn't seen right for me, cause i think control4 should deal with that without problem!!1

Any thoughts about it????

[dogdvr]

The HC800 can provide the 12 volts needed for the screen, some people still prefer to have a seperate power supply.

[LSDave]

by using a separate 12v supply you avoid any risk of damaging your controller. Altho i have used the 12v from the controller as well for some screens.

[Cyknight]

Note the relay (and virtually NO relay) supplies 12v, or any voltage. It IS possible to steal the 12v from a SENSOR on the 800 and use that power. However that output is counted in a few milliamps so it certainly is possible that that won't be enough - that would depend on the screen. This is only if the screen is actually controlled by a second relay, for instance a high voltage relay.

The controller is NOT meant to have 120v run direct through it's relays.

Now it's possible to use the relay on a screen with dry contact closures, in which case the SCREEN will be supplying the voltage - in which case no powersupply is needed at all.

[Luis Guilherme]

Thanks everyone for helping me.

I decide to use dry contacts because could be safer... and i think it will work!!!