Yes, the shields around the ethernet jacks. I presume they have a little metal tab that would engage with a shielded plug if inserted. I think the USB shield should be connected to internal ground as well.
From: Mike Hammett Sent: Monday, June 25, 2018 8:06 AM To: AnimalFarm Microwave Users Group Subject: Re: [AFMUG] Fw: -48 vDC to 48 vDC When you say chassis, I assume the case, but this is a plastic case, so something inside? https://mikrotik.com/product/RB960PGS ----- Mike Hammett Intelligent Computing Solutions Midwest Internet Exchange The Brothers WISP -------------------------------------------------------------------------------- From: ch...@wbmfg.com To: af@af.afmug.com Sent: Monday, June 25, 2018 8:44:01 AM Subject: [AFMUG] Fw: -48 vDC to 48 vDC Hard to answer. Power up the MT with it resting on something that is not conductive. Measure from both sides of the incoming power to the chassis and ethernet shield connection. If there is no voltage between chassis and shield and either side of the power input it is probably a floating load. If it is a floating load you can hook it up to any source of 48 volts. However, if you measure a voltage from chassis to the positive input, then it is a negative ground load and will short out a –48 input. From: Mike Hammett Sent: Monday, June 25, 2018 7:27 AM To: AF Subject: -48 vDC to 48 vDC I have a Mikrotik hEX PoE plugged into a telco -48 vDC plant by reversing the polarity of the power wires. Should I expect a cat 5 connection between the router and the DSLAM to cause issues? ----- Mike Hammett Intelligent Computing Solutions Midwest Internet Exchange The Brothers WISP -- AF mailing list AF@af.afmug.com http://af.afmug.com/mailman/listinfo/af_af.afmug.com -------------------------------------------------------------------------------- -- AF mailing list AF@af.afmug.com http://af.afmug.com/mailman/listinfo/af_af.afmug.com
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