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Forums > CI World > Custom Installers' Lounge
Basic Relay circuit design help... (Page 2)
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Topic:
Basic Relay circuit design help for lift!!
This thread has 19 replies. Displaying posts 16 through 20.
Post 16 made on Friday September 17, 2004 at 14:45
Audible Solutionns
Super Member
Joined:
Posts:		March 2004
3,246
Here a cool site with lots of diagrams:[Link: the12volt.com]

Here is how to decipher how the numbers corruspond to contacts:[Link: the12volt.com]

I still beleive that sound engineering requires you to interlock the coils so that it is impossible to activate both directions at the same time. Remeber if you use a change of direction as a brake you will probably fuse the relay's contacts. Hence, my advice use TPDT
"This is a Christian Country,Charlie,founded on Christian values...when you can't put a nativiy scene in front fire house at Christmas time in Nacogdoches Township, something's gone terribly wrong"
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Post 17 made on Friday September 17, 2004 at 19:04
Evil Twins
Long Time Member
Joined:
Posts:		November 2003
132
Mike, most Infocus proj. have both outputs pulsed and latched. Assuming yours has the latched you could easily do this with 3 spdt 12v automotive relays and a 12 volt power supply to provide power to the lift motor. 3 relays at $1.25 and power supply for $20 with 2 limit switches.

We build our own lifts, masking systems or whatever that needs to motorized, with these simple to obtain parts. If you need a diagram on this just let me know and I'll email one to you.

Bob
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Post 18 made on Friday September 17, 2004 at 21:21
Ernie Bornn-Gilman
Yes, That Ernie!
Joined:
Posts:		December 2001
30,104
On 09/17/04 01:04 ET, Larry Fine said...
Owning a B&K AVP-4090, I'm very familiar with
the 15ma. output capacity. I used a 12v. reed
relay (which has a coil current of 11ma.) to activate
a 120v. relay with 10a. contacts, which in turn
powers a 25a., 4-pole contactor which control
4 of the 8 circuits in my sub-panel.

Look, everybody -- it's an AMPLIFIER!

11 ma turns into 25 amps via some mechanics!
A good answer is easier with a clear question giving the make and model of everything.
"The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw
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Post 19 made on Friday September 17, 2004 at 21:23
Ernie Bornn-Gilman
Yes, That Ernie!
Joined:
Posts:		December 2001
30,104
On 09/17/04 18:45 ET, Audible Solutionns said...
Hence, my advice use TPDT

Dude! That's usually written 3PDT so you can't confuse it with 10PDT (also TPDT, you see) or DPDT (two-pole [dual, actually])
A good answer is easier with a clear question giving the make and model of everything.
"The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw
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Post 20 made on Friday September 17, 2004 at 21:47
installer_574
Long Time Member
Joined:
Posts:		November 2003
220
my brain hurts...
Go phuq yourself!
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