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leosmendes
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-48v (-53) for CRS309

Wed Dec 07, 2022 4:35 pm

-hello good morning, I want to unify my power system to -48v. I have two PCS one running mikrotik, in these I have M4-ATX sources being fed at 24v, I also have two CRS309 being fed by the same source at 24v. It so happens that I also have an olt huawey ma5800 still operating on AC but I have a -48v source and battery bank for it (-53 real). I recently acquired atx power supplies capable of operating at -48v, and I know that the CRS is capable of accepting up to 57V. My question is... will I have a problem connecting these three pieces of equipment? I noticed that both the pc and the olt, if you measure the sfp port frame, and any of the source poles are 0 or -48, the potential difference is always equal to 0 , but if you measure the sfp port frame on CRS with the positive source that feeds it I have the 24v.

*I forgot to mention that I use a dac cable to connect the equipment

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