Contec SPI-8451-LVA - Manual (Page 43)

4. Jumper Setting
36
SPI-8451-LLVA, SPI-8452-LLVA, SPI-8451-LVA
RS-422 Setting
RTS#
JP3: 7-8
TXD#
TX-
RTS-
TX+
RTS+
RX+
CTS+
RX-
CTS-
JP3: 7-8
JP2: 5-6
JP2: 3-4
JP2: 1-2
D
R
D
R
RXD#
RTS
CTS
SERIAL2
1
2
3
4
5
6
7
8
9
JP3: 5-6
JP3: 4-6
120 Ω
120 Ω
120 Ω
120 Ω
Figure 4.1. RS-422 Setting