Gilderfluke&Co 8 Bit Digital Audio Systems - Manual (Page 22)

adapter cable, so long as the wire isn't too long and there arenÕt too many
AB-100s and AB-Clocks attached to the same serial line. To gain the full ad-
vantage of the RS-422/RS-485 signal levels (multidrop networking, distances
of up to a mile) you will need to use a signal level adapter.
To cross wire the RS-422/RS-485 signals from the digital audio system to
the RS-232 serial port of an IBM compatible, cross connect the signals as
follows:
DB-25 DE-9 SIGNAL SIGNAL FROM/TO AUDIO SYSTEM
2 3 DATA OUT - SERIAL DATA IN TO REPEATERS (GREEN)
3 2 DATA IN - SERIAL DATA OUT FROM REPEATER
(BLACK)
7 5 GROUND SIGNAL GROUND (BLUE or WHITE)
Apple Macintosh computers have true RS-422 serial ports built in. To con-
nect to the digital audio system, the pin out is as follows (view is of connec-
tor on the outside of a Macintosh):
to + serial data in to repeaters (yellow)
to - serial data in to repeaters (green)
1 2
3 4 5
6 7 8
from - serial data out from repeaters (black)
from + serial data out from repeaters (red)
signal ground (white or blue)
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