On Mon, 05 May 2008 09:24:59 -0700, baranovus wrote:

> Hello All.
> I have two distant locations connected with 3-wire cable - "+", "-" and
> "common". Voltage 24V DC can occasionally appear between "+" or "-" and
> "common". I have to install Ethernet communication through this cable.
> Modification of  special Netgear  "Ethernet over Power line" switch
> solves the problem but I have to disassemble the switch, cut and
> reconnect some wires.
>  It's too difficult to rebuilt about 200 Netgear switches. Maybe
> somebody knows the device, which does it 'as is'? Thanks.

Try this question on sci.engr.control -- there's a lot of industrial 
control guys on that group, one of whom may know the answer.

-- 
Tim Wescott
Control systems and communications consulting
http://www.wescottdesign.com

Need to learn how to apply control theory in your embedded system?
"Applied Control Theory for Embedded Systems" by Tim Wescott
Elsevier/Newnes, http://www.wescottdesign.com/actfes/actfes.html

Hello All.
I have two distant locations connected with 3-wire cable - "+", "-"
and "common". Voltage 24V DC can occasionally appear between "+" or
"-" and "common". I have to install Ethernet communication through
this cable. Modification of  special Netgear  "Ethernet over Power
line" switch solves the problem but I have to disassemble the switch,
cut and reconnect some wires.
 It's too difficult to rebuilt about 200 Netgear switches. Maybe
somebody knows the device, which does it 'as is'?
Thanks.