2 Feb
2018
2 Feb
'18
4:54 p.m.
On Feb 2, 2018, at 7:26 PM, Paul Berger via cctalk
<cctalk at classiccmp.org> wrote:
On 2018-02-02 7:13 PM, Fred Cisin via cctalk wrote:
Pin 1 is supposed to be protective (shield) ground and pin 7 is signal ground.
Paul.
Similar to safety ground (green) and neutral (white, in the USA) on power wiring.
paul
they
might have different ground systems. If so, grounding both ends might produce a LARGE
current through the cable, possibly enough to be hazardous.
OB_Ignorant_Question: Is that the reason why RS232 DB25 has both pin 1 and pin 7?