Tangent: Interest Check: Belden Thicknet 10base5 Ethernet Coax
phb.hfx at gmail.com
Fri Feb 2 18:26:15 CST 2018
On 2018-02-02 7:13 PM, Fred Cisin via cctalk wrote:
>> 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?
Pin 1 is supposed to be protective (shield) ground and pin 7 is signal
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