[Rene Nuñez Paz]

Hello
I have a doubt about how connect a AC Relay for start an AC Motor. (I don’t want burn CNC controller-relay or Parallel port of my PC). I want to start-stop a 115 VAC/ 1Amp Universal Motor.
I have a CRYDOM EZ240D18 AC RELAY capable to drive an 18Amp motor, activate for a signal of 3-15Vdc / 125mA.
I read a lot about ways of connect this device, some of this tells about connect directly one selected Output pin of PP (1,14,16,17) to (+) connector and GROUND Pin (25) to (-) connector in Relay and it will be enough to start the AC device. (Tom Benedicts)
Other texts talks about use +5VDC source and use some resistors, using also some of Output pins of PP in combination.
Also I have a doubt if PP if capable of generate 125mA of current for activate DC Relay,
At the end, I have a lot of doubt, because and don’t know what kind of connection select.
I attach two different options of connection, in Option 1 is used one output pin and ground, in Option 2 are used one output pin to (–) connector and +5VDC source to (+) conector, using a 2.2K resistor. (Ground is not used). This is some confusing for me.
I will thanks some help about this,
Regard
Rene

[Regnar]

I use option 1 for both my router and dust collection. No ill effects and is simple. You didnt mention your Break Out Board as there should be directions on how to connect a relay somewhere in the instructions.

[Al_The_Man]

I see an operating current of 15Ma for that model?
Method 1 should work.
Personally I prefer to use a 2n7000 buffer on any low level port.
Al.

[Rene Nuñez Paz]

Hello
Thansk for your answer
Regnar
Attach complete diagram of connection, Iam not use breakout board, I use Hobby CNC controller, it will provide free access to PP port, NOT PULLED. That’s one reason of my questions. There are not instructions about use it, only the indication of this pins are free for use.
Al
“Personally I prefer to use a 2n7000 buffer on any low level port”
If it helps, can you send me some diagram of connection, please?
Thanks again.

Regards
Rene

[Rene Nuñez Paz]

Attchi is complete diagram
Bye
Rene

[Al_The_Man]

Do a search here for 2n7000 it should bring up a few examples.
http://www.cnczone.com/forums/genera...f_control.html
Al.

[Rene Nuñez Paz]

Hello
Thanks A LOT, AL
Verey useful information you provided me,,,,
I was never search in ELECTRONIC part in CNC ZONE....

Regards
Rene