Resolved STF-8300EN What are the two included jumpers for?

Discussion in 'STF Series' started by Dave Allmon, Jul 31, 2020.

  1. Dave Allmon

    Dave Allmon Standard User

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    Jul 6, 2020
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    Hi,

    I just received my STF-8300EN and on the packing list and in the box there were two shorting jumpers. I can't find what they are for in any documentation.

    Thanks,
    Dave
     
  2. Doug

    Doug Staff Member

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    Sep 25, 2014
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    6,963
    It's a bit of an hangover from the days when it was common to use an external relay box on the guide port.

    If you install the two jumpers on the J8 jumper block, it will apply ground and +12V to the guide port common and AUX pins, respectively. This can be used to power the external relay box.

    The output is already optoisolated so it is very rare to need the relay box these days.
     
  3. Dave Allmon

    Dave Allmon Standard User

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    Jul 6, 2020
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    I'm pretty sure I won't be doing that. Thanks Doug!
     

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