4 serial ports (com1, com2), Rs-232, Rs-485 – Acrosser AR-B1640 User Manual
Page 11
AR-B1640 User’s Guide
11
3.4 SERIAL PORTS (COM1, COM2)
•
COM1 D-SUB 9-PIN
•
COM2 10-pin Connector
1
10 2
9
3.5 COM1 RS-232/RS-485 SELECT (XP1, XP2)
•
RS-485 Terminator Select (J2)
J2 (ON)
•
RS-485 Header (J1)
1
2
3
PIN
Signal
PIN
Signal
1
/DCD1
2
RXD1
3
TXD1
4
/DTR1
5
GND
6
/DSR1
7
/RTS1
8
/CTS1
9
/RI1
10
GND
PIN
Signal
PIN
Signal
1
/DCD2
2
/DSR2
3
RXD2
4
/RTS2
5
TXD2
6
/CTS2
7
/DTR2
8
/RI2
9
GND
10
NC
JUMPER
FUNCTION
XP1
1
3
5
1
2
3
XP2
RS-232
FACTORY PRESET
XP1
1
3
5
1
2
3
XP2
RS-485
PIN
Signal
1
N485+
2
N485-
3
GND
1
5
6 9
FACTORY PRESET
* When there is only one line the setting should be left off
(please take off the jumper), if multiple blocks are used on a
single line this should be set to “ON”(place a jumper) in order
to properly terminate the connection for better transmission