7i96s drive Lenze 8200 VFD

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18 Feb 2024 18:26 #293695 by kevin_allein
Hi all,
I am trying to use a 7i96s and want to drive a Lenze 8200 VFD. I am using the analog spindle 0--5 V to control the spindle speed, and that seems to work well. For the rotation direction, I need to drive a separate pin (E4) to either 0 or ~20V. The VFD supplies that voltage on another pin.
But how can I use the generic output pins, e.g. Out0+ and Out0- to drive either 0 or 20 V ? The Lenze pin seems to have an internal pull down, so if I do nothing my multimeter shows 0 V, but how can I drive 20 V ?


 

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18 Feb 2024 18:57 #293699 by PCW
Replied by PCW on topic 7i96s drive Lenze 8200 VFD
The SSR outputs are just a switch so if you need to drive the input with 20V
you connect OUT0+ to +20V and OUT0- to the drives direction input pin.

Then when SSR0 is on, the direction pin is driven to +20V and when
SSR0 is off, the direction input is pulled down to 0V.

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