mechanical brake with ac tech scf series vfd

[chatter]

i am wanting to use a relay to operate a mechanical brake my problem is i dont have a relay terminal i see 14 15 have 1 to 10 vdc output is this what to use ? and would the run paremiter be the paremiter to use to energize the relay ? thanks for any help on this

 

[Steve Bailey]

Here is what I learned by Googling "ACTech SCF VFD".
From Page 21 of the manual

https://files.valinonline.com/userfiles/documents/ac-tech-scf-drives-installation-operation-manual.pdf

Connect a relay with a 12 VDC coil to terminal TB-11 and TB-14 (or TB-11 and TB-15). Then program parameter 6 or parameter 13 with a value of 2 depending on whether you used terminal TB-14 or TB-15 (Page 32).
The relay will be energized when the drive is running. If your holding brake is electrically released, use a NO contact from the relay to control it. If the brake requires power to function, use a NC contact. Make sure you select a relay with the capacity to handle the brake's current and voltage and that does not exceed the 50 mA current limit of the drive's open collector output.

 

[chatter]

thank you ! so to be clear i use tem 11 on the positve side and 14 on the neg.? sorry for exrra question . but i want to be sure . and thanks agian been reading 2 days and missed that

 

[Steve Bailey]

Look at the direction of the snubbing diode on page 21. Current flow is from Terminal 14 to terminal 11.

 

[chatter]

ok thanks agian

 

[GaryS]

I feel I have to bring this up but, is this a hoisting application
If so then would recommend replacing the VFD with a hoist certified VFD. The best I know of is Magnetek the original brand was the very first VFD’s to have a hoist rating.
They are designed with safety as a priority. They have proof of torque before they release the brake and proof that the brake can hold the load before releasing control of the motor and powering down.
They have many other features to enhance the safety and performance of the hoisting application.
I have been using them since they were first introduced under the original brand name.

 

[goghie]

@GaryS , what do you mean when you write "hoist certified VFD"?
I presume that you are talking about some specific official regulative for VFDs used with hoists. I know that there are "derivatives" from other standards ( like IEC 61800, EN 13849, IEC 62061, IEC 61508 etc) that are implied, but I am not aware that there is standard for Variable Speed Drives used for hoisting. I've used many drives from different producers that are specialized for crane and/or hoisting applications, but never knew there is specific standard for it. Do you know maybe exact name that standard?

 

[chatter]

thanks for the input but mine is not a hoist operation its for home use controling a motor on a cable car to move suplies up and down a hill to the lake thus the questions i try to program it myself i got it doin what i want just wanna use the brake to make sure it stops and was not sure how to energize the relay to release the brake steve has guided me in the rt direction i belive

 

[Inappropriate Jocularity]

thanks for the input but mine is not a hoist operation its for home use controling a motor on a cable car to move suplies up and down a hill to the lake thus the questions i try to program it myself i got it doin what i want just wanna use the brake to make sure it stops and was not sure how to energize the relay to release the brake steve has guided me in the rt direction i belive

I'm not sure if I should be sorry for this or not? (Think my Dem and Rep are having a argument right now)


BUT>>>> When did punctuation become NOT a thing?

 

[Steve Bailey]

just wanna use the brake to make sure it stops

You should think of a brake controlled by the the running status of the VFD as the emergency brake on your car, not as the brake controlled by the foot pedal. In other words, it is the brake you use after you have stopped to make sure the driven load doesn't move. It is not the brake you use to slow down.