Page 4-2 GMC 7XX Installation Manual
Revision F 190-00303-70
4.3 Serial Data
4.3.1 Serial Data Electrical Connections
4.3.1.1 RS-232
Pin Name Connector Pin I/O
RS-232 OUT 1 P7101 1 Out
RS-232 IN 1 P7101 2 In
RS-232 OUT 2 P7101 3 Out
RS-232 IN 2 P7101 4 In
SIGNAL GROUND P7101 6 --
SIGNAL GROUND P7101 8 --
The RS-232 outputs conform to EIA Standard RS-232C with an output voltage swing of at least ±5V
when driving a standard RS-232 load.
4.4 Lighting
Pin Name Connector Pin I/O
LIGHTING BUS HI P7101 11 In
LIGHTING BUS LO P7101 12 In
The GMC 7XX can be configured to track a 28 Vdc, 14 Vdc, 5 Vdc, or 5 Vac lighting bus using these
inputs. The GMC 7XX can also automatically adjust for ambient lighting conditions based on photocell
input. GMC 710 and GMC 715 units with software version 3.00 and later can be configured to adjust the
lighting based on a 10 Hz periodic lighting message from the GDU’s. GMC 705 units with software
version 2.00 and later can be configured to adjust the lighting based on a 10 Hz periodic lighting message
from the GDU’s.
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