34
RS-232 Port (COM1)
Pin
Signal
Description
1
DCD
Data carrier detect (input)
2
RXD
Receive data (input)
3
TXD
Transmit data (output)
4
DTR
Data terminal ready (output)
5
GND
Signal/power ground
6
DSR
Data set ready (input)
7
RTS
Request to send (output)
8
CTS
Clear to send (input)
9
RI / PWR
Bar code scanner power (1 A max) or Ring indicator (input)
