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Chapter 2: Installation and wiring
Vigilant VS1 and VS2 Technical Reference Manual
73
DB-9 pin connections
DB-9 male
(front view)
SA-232 card to computer DB-9 connections
SA-232 card
DB-9
Description
GND
COM (pin 5)
Black wire (ground connection)
RTS - Not
used
TXD
RXD (pin 2)
White wire (communication)
RXD
TXD (pin 3)
Red wire (communication)