User's Manual

Trailblazer Installation and User Manual version 1.03 42
Standard “AT” Pinout for a DB9 Connector
Figure 14: Serial Data Cable Schematic
Table 11: Serial Data Cable Pinout
Serial Data Cable Pinout
Pin
Signal
Description
Direction
1
DCD
Data Carrier Detect
To PC
2
RD
Receive Data
To PC
3
TD
Transmit Data
From PC
4
DTR
Data Terminal Ready
From PC
5
GND
Signal Ground
Common
6
DSR
Data Set Ready
To PC
7
RTS
Request to Send
From PC
8
CTS
Clear to Send
To PC
9
RI
Ring Indicator
To PC