Please help, I need to control projector and screen.

[rickc]

We need solution to control when projector turns on screen comes down and projector turn off screen goes up.

Screen and projector are inaccessible and control should be done in out media control room. may video signal to trigger screen control switchs, projector is control by eithernet, may be they have eithernet competible relay to control screen.

Thanks for help.

[jimfred]

This cinemasource.com/articles/screen_wire.pdf lists several options. If your projector has screen-relay outputs and you can run a cable from the projector to the screen control box, the solution may be simple.

Here's an example of an Ethernet relay: relaycontrollers.com/Relay/Relay/CAT_RELAY2_ETHERNET. Prices seem to be around $250 and the relay would need to be controlled by something: manual control thru a web interface, or a matched ethernet sender that is manually controlled with a switch or triggered by the projector.

If CAT-5 cabling is available and the Ethernet relay is too expensive then the CAT-5 cabling can be used to wire a relay circuit. Since Power-over-Ethernet (PoE) over CAT-5 is capable of 44 V DC @ 13 Watts, Cat5 would handle, say, a 12 Volt DC relay circuit.

[Borggren]

Kramer has several "media/room controllers" with relay, RS232 and ethernet connections. Another company is "Neets". They also make what you are looking for.
http://www.kramerelectronics.com/pro...pid=678&sf=109
http://www.neets.dk/

[daver2]

We control our projectors via the RS232 serial port from the A/V area. Our remote electrical screen is physically powered from the A/V area and the up/down control is located within the A/V area. There is no 'remote control' via ETHERNET (or otherwise) involved - just a standard switched-mains connection. This keeps the overall cost fairly low as not much in the way of technology is necessary and there is also less to break/go wrong. It does, however, mean that you have to lower the screen and switch the projector on separately rather than controlling the screen from the projector.

Dave

[[Admin] osborn4]

Our screen is controled by what looks like a garage door opener.

Four our projector, we ran a cable with 1/8 in plugs on both ends that plug into the projector and remote.