Asus P5LD-MR - Manual (Page 49)

ASUS P5LD-MR 2-29
6. Serial port connector (10-1 pin COM2)
This connector is for a serial (COM) port. Connect the serial port
module cable to this connector, then install the module to a slot
opening at the back of the system chassis. The serial port module is
purchased separately.
7. Ambient thermal sensor (2-pin TRPWR1)
If you want additional thermal monitoring, connect the thermal sensor
cable with thermistor (of 1ºK or at 25ºC, B=3435) to this connector.
R
P5LD-MR
P5LD-MR Serial Port2 (COM2) Connector
PIN 1
COM2
R
P5LD-MR
P5LD-MR TRPWR Connector
TRPWR1
SYS-THEAMAL
2
GND
The thermal sensor cable is purchased separately.