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How does the shield connection of the comm port on ION8600/8650 connect to earth ground?

The RS485 shield is connected to earth ground through a 120ohm resistor.
The RS232 shield is connected to earth ground through a 15V sidactor, 1Mohm resistor, and a 1nF capacitor.


Legacy KB System (APS) Data: RESL209509 V1.0, Originally authored by MaTh on 10/27/2012, Last Edited by MaTh on 10/27/2012
Related ranges: ION8650, ION8600
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