TME-EPIC-HURPM-R1V5.doc
Rev 1.5
Page 21 of 41
3.12
Serial Ports
Serial Port 1 is located at the I/O panel while Serial Port 2 is an IDC10 pin header (X8). An adapter
cable with a standard DB9 male connector is available.
The ports either work in RS232 or RS485 mode, selectable in the BIOS.
When entering in BIOS Setup the item Special Features, the Serial Port 1 Mode and Serial Port
2 Mode can be selected.
Termination resistors for RS485 Mode can be set with Jumpers on pin header X10.
To enable transmitters of Serial Port 1 and 2 in RS485 Mode set RTS signal to ‘1’.
The serial ports can be configured in BIOS setup. When entering item Integrated Peripherals ant
then SuperIO Device configuration of the serial ports is accessible.
The following settings are possible for Serial Port 1 and Serial Port 2:
•
Disabled
•
3F8 / IRQ4 (base address / interrupt channel)
•
2F8 / IRQ3 (base address / interrupt channel)
•
3E8 / IRQ4 (base address / interrupt channel)
•
2E8 / IRQ3 (base address / interrupt channel)
•
Auto
The modes can be switched between RS232 and RS485.
COM1 Connector
Connector type: D-SUB9, male (X11C)
Pin assignment:
Pin
RS232
Signal
RS485
Signal
Pin
RS232
Signal
RS485
Signal
1
DCD
Not used
6
DSR
RXD+
2
RXD
RXD-
7
RTS
TXD+
3
TXD TXD-
8
CTS Not
used
4
DTR
Not used
9 Not used
Not used
5
GND GND
