protech PA-6225

Chapter 2 System Configuration
PA-6225 SERIES USER MANUAL
Page 26
2-4-1. COM Port RI & Voltage Selection
JP_COM1, JP_COM2, JP_COM3, JP_COM4: Pin-headers on board.
SELECTION
JUMPER
SETTING
JUMPER ILLUSTRATION
RI
1-2
5
6
1
2
JP_COM1
5
6
1
2
JP_COM2
5
6
1
2
JP_COM3
5
6
1
2
JP_COM4
+12V
3-4
5
6
1
2
JP_COM1
5
6
1
2
JP_COM2
5
6
1
2
JP_COM3
5
6
1
2
JP_ COM4
+5V
5-6
5
6
1
2
JP_COM1
5
6
1
2
JP_COM2
5
6
1
2
JP_COM3
5
6
1
2
JP_ COM4
Note: Manufacturing Default is RI for JP_COM1 & JP_COM4, and no connection for
JP_COM2 & JP_COM3.
Caution:
1. The voltage of external COM 2 & COM3 ports can be controlled on BIOS for your
convenience. The corresponding jumpers JP_COM2 & JP_COM3 are set open (no connection)
by default. Refer to the Voltage Adjustment Configuration section of Chapter 3 for detailed
jumper setting (BIOS default: RI).
2. JP_COM2 & JP_COM3 can be enabled when COM2 & COM3 voltage adjustment is disabled
on BIOS.
3. The voltage of COM port is adjustable by BIOS or jumpers. You can select to adjust the
voltage of COM ports either through BIOS or by setting jumpers. DO NOT use these two
methods at the same time in case of system error, component damage or serious boot failure.