Gilderfluke&Co PA System - Manual (Page 10)

COLOR Signal NAME:
LEFT White Signal Ground
Black - Serial Data OUT FROM PA SYSTEM
Red + Serial Data OUT FROM PA SYSTEM
Green - Serial Data IN to PA SYSTEM
Yellow + Serial Data IN to PA SYSTEM
RIGHT Blue Signal Ground
To cross wire the RS-422 / RS-485 signals from the PA System to the RS-232 serial port of an IBM com-
patible, 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 connect to the PA System, the
pin out is as follows (view is of connector 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)
The PA System expects to see the serial data in the following format
ONE START BIT
EIGHT Data BITS
ONE or TWO STOP BITS
If the odd parity is enabled, then the data appears in the following format:
ONE START BIT
SEVEN Data BITS
ODD PARITY BIT
ONE or TWO STOP BITS
When the parity is enabled, any data with a parity error in it is simply ignored.
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