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> I'm working on a user manual for a SCADA-driven programmable logic
> controller (PLC). The unit accepts add-on cards, much like a desktop
> personal computer.
> Referring to the contextual samples below, my question pertains to the use
> of "backpan" vs. "backplane." I think it's the latter, and can find online
> support for this. The engineer who designed this unit, and its
> predecessors, thinks it's the former. I can find no definition for this,
> nor online support.
> - These terminal boards provide excellent lightning/surge protection and
> alleviate the need to install discrete interposing devices to the enclosure
> - <Model number> Card Chassis
> <Company name> 5 slot card chassis, including *backplane*: 1lb 3.5oz.
> ( 552g )
> <Company name> 12 slot card chassis, including *backplane*:
> What's your take?
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