Chapter 3 Hardware Configuration
SP-7755 USER MANUAL
Page: 3-9
3.5 Setting Main Board Connectors and Jumpers
3.5.1
COM Connector
Connector Location: COM1, COM2
Description:
COM Connector
COM1(RS232) Connector Pin Assignment:
PIN
ASSIGNMENT
PIN
ASSIGNMENT
1
COM1_DCD
6
COM1_DSR
2
COM1_RX
7
COM1_RTS
3
COM1_TX
8
COM1_CTS
4
COM1_DTR
9
COM1_RI
5
GND
10
NC
COM2(RS232/RS422/RS485) Connector Pin Assignment:
PIN
ASSIGNMENT
RS232
(Default Setting)
RS422
RS485
1
COM2_DCD
TX-
D-
2
COM2_RX
TX+
D+
3
COM2_TX
RX-
NC
4
COM2_DTR
RX+
NC
5
GND
GND
GND
6
COM2_DSR
NC
NC
7
COM2_RTS
NC
NC
8
COM2_CTS
NC
NC
9
COM2_RI
NC
NC
10
NC
NC
NC
Notes:
1.
COM2 is selectable as RS232, RS422, RS485 by BIOS setting.
2.
Default setting is RS232. Please see
Chapter 5 “Advanced – Onboard Device
Configuration”
for selection details.
COM1/
COM2/