VFD-Need Help Identifying Terminals

[npalen]

Been using this VFD to power a buffer for several years and now wanting to use it for a three phase motor on my lathe. I'm curious what the terminals are for that are circled in red. Any ideas? TIA

 

[hiddentacocatneddih]

Picture is really blurry

+ and - on a VFD typically is the DC bus internally.

 

[npalen]

Did you click on the thumbnail?

The four terminal markings left to right are: (/) +1 + -

The two middle ones are jumpered together.

 

[hiddentacocatneddih]

What brand VFD is it ?

 

[npalen]

It is a Polyspede brand but they were apparently acquired by Hitachi. The Polyspede number is XLT5-20 (2.0 HP) and the Hitachi number is L100-015NFU. I have the manual as well as a quick reference manual but neither show these terminals.

 

[npalen]

I'm wondering if those terminals are for an external braking resistor. Would that make sense?

 

[hiddentacocatneddih]

I'm wondering if those terminals are for an external braking resistor. Would that make sense?

That's pretty common as well.

Normally the manual will spell out what the terminals are.

 

[CalG]

http://www.polyspede.com/pdf/XLT3M.PDF

 

[npalen]

http://www.polyspede.com/pdf/XLT3M.PDF

Thanks for posting. I scanned thru it but don't see anything like the terminals.

I did find the Hitachi version manual but don't see anything in there either.

https://cdn.automationdirect.com/static/manuals/l100/l100.pdf

 

[Handloader109]

Uh, on most of these type devices, they aren't for you to mess with...
Truly, Stick with the front terminals. Just sayin