Gecko g540 and spindle relay question

[Claytonc]

Of course I now have a Gecko g540 and I want to control my router (120v) with it. I already have a 24v/120v relay and am using a 24v PS. My question is, does the G540 simply make a connection from pin 5 to ground (a relay itself?) or does it acutally supply voltage for the relay itself? I was using a TB6560 before this and it had two connections for the relay and it simply connected the two terminals when the spindle button was pressed. Is the G540 the same or not? (before I blow something up lol)

[BanduraMaker]

The manual states that it sinks the power. i.e. it connects it to ground, but not using a relay.

[JD68]

You might find this helpful.

http://www.rpc-electronics.com/g540.php

[Claytonc]

Originally Posted by BanduraMaker The manual states that it sinks the power. i.e. it connects it to ground, but not using a relay.

Hmm... So... I'm still a little confused.. Should I run my +24v to my relay and the relay '-' to pin 5?
Sorry if I sound ignorant.. If so it’s because I am lol

PS: I'm useing the same power supply for the G540 and the relay.

[Al_The_Man]

The manual appears to show it fairly plainly with an example showing one side of the relay coil goes to pin5 and the other side of the coil to +24v?
IOW, the G540 sinks the power to common.
You should use a reverse emf diode across the coil, the + band on the diode would go to the +ve side of the coil.
Al.

[JD68]

Originally Posted by JD68 You might find this helpful. http://www.rpc-electronics.com/g540.php

Since you are using a 24V supply please disregard my suggestion. The relays on the interface board are 12V.

[Claytonc]

I am now clear on this. A diode did come with the relay and I will install it as well.


Thank you all for the help.

[BanduraMaker]

Originally Posted by Claytonc Hmm... So... I'm still a little confused.. Should I run my +24v to my relay and the relay '-' to pin 5? Sorry if I sound ignorant.. If so it’s because I am lol PS: I'm useing the same power supply for the G540 and the relay.

Yes, that's right. This diagram shows the correct way to wire the diode: Diodes

[DonFrambach]

Are you sure that a blocking diode is required for relays controlled by a g540? I was told that Gecko has said blocking diodes are not required with the g540. Consequently, I have been using my g540 to control two relays without blocking diodes for several months.

[Al_The_Man]

It probably won't hurt, something has to dissipate the energy collapse, it can easily be in the 100's of volts?
Al.

[DonFrambach]

I must confess that my information from Gecko is second hand. I'll drop an email to them and post the response I get.

[BanduraMaker]

Originally Posted by DonFrambach Are you sure that a blocking diode. Is required for relays controlled by a g540?

I absolutely do not know if it's required but it's a best practice in the Electrical Engineering world when it comes to relays or solenoids, especially when they interface with solid state devices. My guess is that it's not required but, a diode costs a few pennies. A G540 a bit more than that.