7i77 analog out 5

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7 years 8 months ago #126564 by mpvriens
Replied by mpvriens on topic 7i77 analog out 5
I have measured on a powered drive , the input measure very low resinstence.
We i put a 1.5 volt battery on the input the spindle runs fine

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7 years 8 months ago #126566 by PCW
Replied by PCW on topic 7i77 analog out 5
Very low?

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7 years 8 months ago #126570 by mpvriens
Replied by mpvriens on topic 7i77 analog out 5
100 ohms

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7 years 8 months ago #126571 by PCW
Replied by PCW on topic 7i77 analog out 5
umm that cant be right...

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7 years 8 months ago #126575 by Todd Zuercher
Replied by Todd Zuercher on topic 7i77 analog out 5

mpvriens wrote: 100 ohms


Should be more like 100 thousand ohms.

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7 years 8 months ago #126577 by tommylight
Replied by tommylight on topic 7i77 analog out 5
That might be the other analog input meant for 0-20mA current, but it looks to low even for that.
Does the drive have another "sollvert" input? Try that one if it does.

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7 years 8 months ago #126581 by PCW
Replied by PCW on topic 7i77 analog out 5

tommylight wrote: That might be the other analog input meant for 0-20mA current, but it looks to low even for that.
Does the drive have another "sollvert" input? Try that one if it does.


That does sound like a likely explanation...

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7 years 8 months ago #126814 by mpvriens
Replied by mpvriens on topic 7i77 analog out 5
Did some test on the 7i77 analog output4 : when put and resistor of 10Kohn on the output en setp to 5 volt, the output drops to 3 volt, if i put a resistor of 12kohm on the output the voltage keeps correct 5 volt

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7 years 8 months ago #126815 by PCW
Replied by PCW on topic 7i77 analog out 5
Sure its 10K resistor?
If a 10K resistor causes an output drop, that likely means the 7I77
opamp that drives that pin or the 7I77s +-14V power suppiy is damaged

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7 years 8 months ago #126853 by mpvriens
Replied by mpvriens on topic 7i77 analog out 5
yes i'm realy sure it is a 10 K resistor
output 5 has the same issue

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