Host Engineering Forum
General Category => General Discussion => Topic started by: maciek on March 24, 2022, 08:30:50 PM
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is the analog signal coming out of the brx plc or the analog madules that you guys have isolated? some of the cheaper dc drives that i like to use require an isolated analog signal.
ideas welcome.
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What you need is a signal conditioner.
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The onboard BRX analog is floating. I recently had an app that will field with a variety of unknown existing VFDs, and I was concerned that some might need a floating analog, so I asked BobO and he said they were.
Although, if you have multiple drives connected to the same module, isolators is a better idea.
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what does floating analog mean?
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It's a differential signal without a fixed reference to ground. If you wire it to a receiver that is referenced to ground, and the voltage is non-zero, the signal will "float" to meet it and nothing will burn up. Same type of signal you'd get from a signal isolator or signal conditioner.
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Not related to the question, but we are prototyping a redesign of Host analog that will eliminate the FPGA. Think it has a fairly decent chance of working, and if so, we'll fast track production.
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Excellent news! Thanks for working on that! Fingers crossed.
Similar specs to the current Host product?
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Excellent news! Thanks for working on that! Fingers crossed.
Similar specs to the current Host product?
Ideally identical. Analog section the same. Processor and backplane redone, but should be comparable.
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so to be sure and excuse my ignorance, what you are saying is that i can take the brx plc onboard analog out signal and wire it directly to one of my kb drives
that require an isolated analog signal and i will not blow anything up? BOB O