ETC ColorSource Relay

Just opened a box of three new ETC ColorSource (Wired) relays. Luckily I see that these are addressed as 512 by default. I've never used RDM.  We have several hard wired opto-isolators in the line going back 25 years! So definitely not two way. Question: If I really wanted  to change the address could I plug a temp DMX cable out of the ELE2 and directly into the relay to program it? And once a new address was programmed I am assuming that address will 'hold' when not in use! I.E. Does RDM have to police its targets all the time? I'm totally RDM illiterate, at this time

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