StarTech.com PEX2S553S - Manual (Page 5)

Instruction Manual
2
Jumper Settings
Power over serial Enable/Disable (per-port):
Each port has 2 sets of jumper pins (labeled above) that can be configured to provide
power over Pin 1 and/or Pin 9, or neither.
RS232 Pinout
NOTE: Pin 1 and/or 9 of the DB9 connector will output DC power if the corresponding
jumper was enabled.
DCD (Data Carrier Detect): No power
sent over Pin 1
5V: DC5V, from LP4 (LP4 power
connection required)
12V: DC12V, from LP4 (LP4 power
connection required)
RI (Ring Indicator): No power sent over
Pin 9
5V: DC5V, from LP4 (LP4 power
connection required)
12V: DC12V, from LP4 (LP4 power
connection required)
Pin 1 DCD
Pin 2 RXD
Pin 3 TXD
Pin 4 DTR
Pin 5 GND
Pin 6 DSR
Pin 7 RTS
Pin 8 CTS
Pin 9 RI
Pin 1 Pin 9
DCD 5V 12V RI 5V 12V