Vecow EAC-2000, User Manual, Page: 26 / 63

19 ©Vecow EAC-2000 User Manual GETTING TO KNOW YOUR EAC-2000/2100
2.3.1.2 COM Port
There are two Serial ports (COM1, COM2) can be configured for RS-232 or
RS-485 mode. In RS-485 mode it needs to change the Jumper setting to on/off
terminal resistor. Please refer to CH 2.5.4.
Software Setting Function
COM 1
COM 2
RS-232
RS-485
The pin assignments are listed in the following table :
COM Port Pin No. RS-232 RS-485 (3-wire)
1, 2
1 ----------- DATA-
2 RXD DATA+
3 TXD -----------
4 ----------- -----------
5 GND GND
6 ----------- -----------
7 RTS -----------
8 CTS -----------
9 ----------- -----------
COM 1 & COM 2 MB connector table :
COM Port MB Connnector COM Port MB Connnector
COM 1 JCOM1 COM 2 JCOM2
COM 1 & COM 2 MB connector pin out :
CN Pin No. Signal Name Pin No. Signal Name
JCOM1
JCOM2
1 ----------- 2 GND
3 ----------- 4 -----------
5 CTS 6 TXD
7 RTS 8 RXD/D+
9 ----------- 10 D-
1 2
4
1
4
1
1
5
1 5
3 1
L1
3
2
1
5 4 6
L2
1 10
1
10
1
10
1
10
1
3
1
3
1
3
1 3
3
3
2
1
74
58
M
75
67
57
9
10
18
1 4
13
14
5 9
10
18
1 4
13
14
5
6 5 4 3 2 1
9
1
3
Y
R9
R10
R8
O
G
R12
R1
R
11
Y
R9
R10
R8
O
G
R12
R1 R
11
Y
R9
R10
R8
O
G
R12
R1
R
11
Y
R9
R10
R8
O
G
R12
R1
R
11
19
1
50 49
2 1
JCOM2 JCOM1