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RS232 SG (pin 5) floating?

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atferrari

atferrari

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RS232 - pin 5 (signal ground SG)

I see it usually connected to the circuit's common at the DCE side.

Is it correct? What is the risk in leaving it floating?

Shouldn't it be floating, strictly speaking?
 
atferrari said:
RS232 - pin 5 (signal ground SG)

I see it usually connected to the circuit's common at the DCE side.

Is it correct? What is the risk in leaving it floating?

Shouldn't it be floating, strictly speaking?
Click to expand...
hi,
If its pin 5 on the 9 way 'D' RS232 connector, it is ground/0v/common and should NOT be left disconnected.


What is the risk in leaving it floating?
You could damage the line driver/receiver.
 
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