Help with wiring a 12V 4PDT Relay

I am trying to follow the following schematic:
http://www.scied.science.doe.gov/nmsb/pdfs/Buzzerset.pdf

Radioshack no longer caries the listed 12V 4PDT relay. I was able to
get a hold of a different 12V 4PDT relay, however I don't know if I can
use it. I know nothing about the wiring of relays. The relay that I
found has 14 pins instead of the 12 listed in the schematic. The pins
are in 3 rows of 4 with the 13th and 14th pins on the 4th row and it
looks like they connect directly to the coil. (I can email you a jpg
of the schematic of the relay if this helps).

Any help or direction would be appreciated.

Thanks,
Sam

 

A 4pole double throw relay (4PDT) should have 14 pins. 2 for the coil and 3
for each pole.

Probably the 3 pins in a row go to one pole. You should be able to use an
ohm meter to figure out which pins are which


--
Dan Hollands
1120 S Creek Dr
Webster NY 14580
585-872-2606

www.QuickScoreRace.com

 

Hi, Sam. First off, I think the parts list for your circuit is in
error. That looks like a standard pinout for a 3PDT relay (note that
pin 8 isn't listed -- it's blank in the schematic). If you look at the
schematic and wiring diagram, you can infer there are only 11 pins
used, as follows:

Relay coil -- pin 4 and 12
Pole 1: Common 3, Normally open 2, Normally Closed 1
Pole 2: Common 7, Normally open 6, Normally Closed 5
Pole 3: Common 11, Normally open 10, Normally Closed 9

That looks like a standard relay pinout.

You should be able to determine the pinout of your relay by doing one
of the following:

* Look on the relay case itself. Many of them have the relay pinout
printed there

* Look at the relay itself, particularly if it has a clear
polycarbonate cover. Sometimes you can actually see the mechanism
itself (do not, however, remove the cover unless you know what you're
doing)

* Look up the data sheet for the relay. It tells all.

If this is over your head, let us know. Also, if you could just
provide the manufacturer and model number of the relay, we should be
able to look it up ourselves to help. Knowing the relay model, we
should be able to give you a pin-to-pin equivalent for your circuit,
which might be all you need to complete what you're doing.

Good luck
Chris

 

Thank you all for your helpful answers. I was able to successfully
follow the schematic and the buzzer system is working. Could not have
done it without your help.

Sam