does anyone have a copy of the Melco MC-9 9 station ICM module manual available? making the connections is pretty easy except for terminal: "PC" and "AUD SUP" I'm not sure what these are for....
AUD SUP is for whichever ringing source you are using for your intercom: 10 Volts AC for the newer buzzers, 18 VAC for the old Edwards Buzzers, or 90VAC for ringers...
PC? I don't recall that one.
A Battery: 24 VDC filtered (Talk path on intercom)
B Battery: 24 VDC unfiltered (for the line/hold relays or line cards)
10VAC: buzzers (intercom or common audible for outside lines)
18VAC: buzzers " " " " " " "
90VAC: ringers " " " " " " "
PC may be paging contact--you would dial one of the intercom codes and then be connected to the overhead paging system. I thought it was called something else.
BTW "AUD SUP" = AUDIBLE SUPPLY
Not sure if you still need one or not but I do have a copy, if you need one just PM me.
the MC-9 was bad, so its gone now.
Out of all the units I ever came across, melco was at the top for dead ones. Valcom was the most forgiving and long lasting.