[Graphicman]

Thank you mactec54 very much

but like i mentioned, my missing information is about the relay requirements., i just want to make sure that the 36v, 7.5A is safe enough to use with the VFD
i have no idea what the VFD control requires for this

[mactec54]

Thank you mactec54 very much

but like i mentioned, my missing information is about the relay requirements., i just want to make sure that the 36v, 7.5A is safe enough to use with the VFD
i have no idea what the VFD control requires for this

No that would not be good to use 36V for switching the VFD on, Not at anytime, the voltage for this type of switching is supplied by the VFD so your relay should only be working like a switch, with no voltage on it's outputs

[Graphicman]

Thanks but i am still confused
here is a link for the driver manual
https://www.machsupport.com/forum/in...0;attach=23971

on the first page there is the only line for the relay
it syas it is up to 36v 7.5A max

please let me know i feel it should work with the vfd!

[doorknob]

The TB6560 board that I have has relay contact output pins that are either open or connected to ground.

The DCM terminal in the image that mactec54 appended (from the manual) is shown elsewhere in the manual as being connected to ground.

So you should be able to use those relay contacts to do the switching that mactec54 described. Just make sure that you determine which of the relay output pins is directly connected to ground and which one is the switched terminal (so that you can wire it up to the VFD correctly).

While I have not found an explicit statement of how much voltage and current would be switched, typically a control input such as that one would involve a relatively low voltage and low current.

So if it were my system, I would hook it up and not be concerned about exceeding the relay's contact ratings.

But to be completely certain, you could use a multimeter to measure the voltage to ground from that input terminal, and you could also use the multimeter (in current-measuring mode, inline) to short that pin to ground and read the actual current that is drawn.