7i77 analog out 5
15 Feb 2019 15:57 #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
We i put a 1.5 volt battery on the input the spindle runs fine
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15 Feb 2019 16:13 #126566
by PCW
Replied by PCW on topic 7i77 analog out 5
Very low?
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15 Feb 2019 17:02 #126570
by mpvriens
Replied by mpvriens on topic 7i77 analog out 5
100 ohms
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15 Feb 2019 17:06 #126571
by PCW
Replied by PCW on topic 7i77 analog out 5
umm that cant be right...
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- Todd Zuercher
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15 Feb 2019 18:02 #126575
by Todd Zuercher
Should be more like 100 thousand ohms.
Replied by Todd Zuercher on topic 7i77 analog out 5
100 ohms
Should be more like 100 thousand ohms.
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15 Feb 2019 18:23 #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.
Does the drive have another "sollvert" input? Try that one if it does.
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15 Feb 2019 19:03 #126581
by PCW
That does sound like a likely explanation...
Replied by PCW 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.
That does sound like a likely explanation...
The following user(s) said Thank You: tommylight
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20 Feb 2019 12:52 #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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20 Feb 2019 13:29 #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
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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21 Feb 2019 09:23 #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
output 5 has the same issue
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