LE-37F User’s Manual
-17-
CN_COM3/4,5/6
: RS232 20-pin header (Pitch 1.27mm x 2.54mm)
Pin
Signal
Pin
Signal
1
DCD1
2
RXD1
3
TXD1
4
DTR1
5
GND
6
DSR1
7
RTS1
8
CTS1
9
RI1
10
NC
11
DCD2
12
RXD2
13
TXD2
14
DTR2
15
GND
16
DSR2
17
RTS2
18
CTS2
19
RI2
20
Key
JP1, JP2
: COM1, COM2 pin-9 setting
Jumper settings Function
1-2
5V
3-4
12V
5-6
RI (Default)
Effective patterns of connection: 1-2 / 3-4 / 5-6
Other may cause damage
JCSEL1, JCSEL2
: For configure COM2 communication mode
Function
JCSEL1
JCSEL2
RS232
RS485
RS422
2
5
6
1
2
5
6
1
2
5
6
1
2
1
11
12
2
1
11
12
2
1
11
12
