How should I activate a brake on the Z axis and mist coolant air valve?

[fusion]

Hello,
I am using a Nema 42 stepper with 24V DC brake on my Z axis. My stepper drives are Leadshine AM882m drives. They have an alarm output for when the drive has a fault. I have a separate 24V power supply for the brake.
My first thought is use one of the 8 relays to control the 110V power going into the 24V power supply. Does this seem OK? How would I wire the alarm output from the Leadshine drive to the Acorn board. I would like to do this to all 3 drives. Can they be wired in series and use only one input?

Second, I have a 110V solenoid valve that controls the air going to my coolant mister. Is it OK to control this with another one of the 8 relays?

As always, thank you for your help.

Mike

[martyscncgarage]

I didn't see current specs on either.
But I suspect you'd probably be OK.

[fusion]

Thanks Marty! Would I wire the alarm output from each drive, in series to an input on the DB25 header? Would it be the + or - that goes to the header?

Mike

[slodat]

Make sure you put a quencharc in the air solenoid circuit.

[martyscncgarage]

Thanks Marty! Would I wire the alarm output from each drive, in series to an input on the DB25 header? Would it be the + or - that goes to the header?

Mike

It appears to me that you need a 2K 1/8w resistor if you feed 24VDC (this is what is standing at Acorn input) no the ALM+
The manual says the Alarm signal can be programmed. I would put a 2k 1/4W resistor on the input you want to use and then tie all 3 alarm+ signals to it, and then connect the alarm- signal to COM

Also, yes, put a quecharc across the coil of your solenoid.

Gary Campbell might have more to add since he's the Leadshine guy.

Marty

[fusion]

Hi Marty,
If I used 5V for VCC would I need a resistor? Would I then wire it to an input on the DB25 BOB? If yes, would it be the ALM- that connects to the DB25?

Thanks!
Mike

[martyscncgarage]

Hi Marty,
If I used 5V for VCC would I need a resistor? Would I then wire it to an input on the DB25 BOB? If yes, would it be the ALM- that connects to the DB25?
AM882 Connections.JPG

Thanks!
Mike

You can wire the drives AND the alarm input to the DB25 with no resistor. Use a DB25 Male breakout board (Amazon stocks them cheaply)
I forgot to mention that! Just set all the drives to have the alarm CLOSE the circuit (ground) so the 3 drive alarms can be wired in parallel.

Good catch!