Contec SPI-8451-LLVA User Manual
3. Hardware Installations
SPI-8451-LLVA, SPI-8452-LLVA, SPI-8451-LVA
23
Serial Port connector: CN6, CN7
Serial1 (CN6) and Serial2 (CN7) are 10-pins box-headers. Both are on board serial ports of the product.
The following table shows the pin assignments of these connectors. RS-232C/422/485 assigned for
Serial2 (CN7) connector only.
The following table shows the pin assignments of these connectors. RS-232C/422/485 assigned for
Serial2 (CN7) connector only.
Table 3.8.
Serial Port connector
Pin No.
1
2
3
4
5
6
7
8
9
10
RS-232C
DCD
RXD
TSD
DTR
GND
DST
RTS
CTS
RI
N.C.
RS-422*
TX-
TX+
RX+
RX-
GND
RTS-
RTS+
CTS+
CTS-
N.C.
RS-485*
TX-
TX+
RX+
RX-
GND
N.C.
N.C.
N.C.
N.C.
N.C.
CN6/CN7
1
6
5
10
*RS-422/485 assigned for Serial2(CN7) connector only.
Pin assignment after conversion by attached cable (D-SUB 9Pin Male Connector, No.4-40UNC)
Table 3.9.
Attached cable (9pin D-SUB) pin assignment
Pin No.
1
2
3
4
5
6
7
8
9
RS-232C
DCD
RXD
TXD
DTR
GND
DSR
RTS
CTS
RI
RS-422
TX-
TX+
RX+
RX-
GND
RTS-
RTS+
CTS+
CTS-
RS-485
TX-
TX+
RX+
RX-
GND
N.C.
N.C.
N.C.
N.C.
1
5
9
6
CAUTION
-
For RS-485, TX+(pin 2) and RX+ (pin 3) must jumper together inside the D type connector.
-
TX- (pin 1) and RX- (pin 4) is the same.