Is RDM supported over local DMX outputs?

I will be using ETCNomad with a Gadget II (which is described as compatible with RDM) in addition to an Element console occasionally. Does both Nomad and Element support RDM through local DMX outputs? I was under the impression that they do, however I am now doubting this assumption after having read in the Element manual that a Net3 Gateway is required wherever references to RDM have been written.

I notice the current manual is labelled as v2.1 while the latest version of EOS is 2.4, so is such information simply outdated and no longer the case?

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