re: PMBus and Power Supply Telemetry by colporteur

colporteur — Thu, 30 Jul 2020 18:37:56 GMT

I enjoyed the presentation. The content for me, was down in the weeds around system development and design level.

The analogy I would use is, a user has asked what is the bandwidth of particular network interface on a networking device. In order to provide that detail the device needs to support collecting the data, the SNMP needs to be configured and the correct MIB (data maps) need to be in place to gather the data and a user interface needs to be in place to display the data.

The users sees a bandwidth number but not the underlying infrastructure to achieve it. PMbus is a conduit to power numbers and controls similar to that provided in SNMP MIB's.

I didn't immediately see where it PMbus provided much advantage over vendor specific diagnostic tools. Like I said, it is way down in the weeds where the data originates. Do I need to know the VCC on a particular Camera? I know the presenter suggested lowering voltages to save power but that is overhead that the companies I worked for would avoid.

re: PMBus and Power Supply Telemetry by phoenixcomm

phoenixcomm — Fri, 31 Jul 2020 14:57:32 GMT

I to the most part agree with colporteur In real -life I don't know how much it would help. I work in the aviation field, it would be nice to have my power instrumented. But I know how much power and voltage is on the bus. I have two-panel meters one for the voltage and the other the Current, and there is a switch, to switch between the buses.

~~Cris