How to connect STOP on projector screen to NI3100 relays

ajay thomas

Hi

I have 4 wires coming from the Da Lite 150 "screen UP,DOWN,GRND,+5V
My problem is how to connect to the relays a STOP function in the NI3100 relay ports.I want to know exactly what goes where

Right now i have the NI3100 setup like this

Projector Lift up- Relay 1 (UP,GRND)
Projector Lift Down- Relay 2 (DOWN,GRND)
Projector Screen Up-Relay 3 (UP,GRND)
Projector Screen Down - Relay 4 (DOWN,GRND)
Projector Screen Stop - ?

Thanks

felixmoldovan

ajay thomas wrote: »

Hi

Right now i have the NI3100 setup like this

Projector Lift up- Relay 1 (UP,GRND)
Projector Lift Down- Relay 2 (DOWN,GRND)
Projector Screen Up-Relay 3 (UP,GRND)
Projector Screen Down - Relay 4 (DOWN,GRND)
Projector Screen Stop - ?

Thanks

Ajay

Isn't maybe

Projector Lift up- ON[Relay, 1] (UP,GRND)
Projector Lift Down- ON[Relay, 2] (DOWN,GRND)
Projector Screen Up- ON[Relay, 3] (UP,GRND)
Projector Screen Down - ON[Relay, 4] (DOWN,GRND)

In this case, the screen (or lift) will stop when you will switch OFF[Relay, 3] AND OFF[Relay,4]
Most of the screens I have worked with will only drive the motor for the time you have a closure (as opposed to pulse), and, will stop as soon as you open the relays.
The motor should also have stop-switches so it releases when the up most/bottom most position has been reached.

I think you will also agree that you must take some precautions in programming for avoiding the simultaneous closure on both UP and DOWN relays.

Ishlachi

With most DaLite screens, you need a simultaneous push of Up and Down to get the screen to stop before the set limits.

Thomas Hayes

I use 'stop' on all my systems just in case the limits switches fail. I also use the Da-lite screens with their LVC. There is a small wiring with some diodes that must be done on the AMX conector but besides that it is very easy.
Here is the info on how I wire and program it.
AMX relay:
1A- GND, buss strip to 2A and 3A.
1B- UP, diode to 3B
2A- GND
2B- DOWN, diode to 3B
3A- GND
3B- STOP, 2 diodes from 1B and 2B
I use a small glass diode, NTE-519, I connect the leads from the 2 diodes nearest the black line together and tie them to 3B. The 2 remaining leads then goto (1 lead each) 1B and 2B

I pulse the relay in the direction that is required and after a wait (this will vary depending on screen size) I will pulse the stop relay. Hope this helps.

ajay thomas

thanks everyone for your help

much appreciated