Contec SPI-8450-LLVA Manuale Utente
CHAPTER 2 –Hardware Installations
SPI-8450-LLVA
13
2.7
Serial Port connector: CN6 /CN9
COM1(CN6) and COM2(CN9) are use in the 10-pins box-headers, are onboard serial
ports of the CPU card SPI-8450-LLVA. The following table shows the pin assignments of
these connectors.
CN6,CN9
PIN No.
RS-232C
RS-422*
RS-485*
1
DCD
TX-
TX-
2
RXD
TX+
TX+
3
TSD
RX+
RX+
4
DTR
RX-
RX-
5
GND
GND
GND
6
DST
RTS-
N.C
7
RTS
RTS+
N.C
8
CTS
CTS+
N.C
9
RI
CTS-
N.C
CN6,9
1
6
5 10
10
N.C
N.C
N.C
* RS-422/485 assigned for COM2(CN9) connector only.
Pin assignment after conversion by attached cable (DB-9 connector)
Note:
y
For RS-485, TX+(pin 2) and RX+ (pin 3) must jumper together inside the D type
connector.
y
TX- (pin 1) and RX- (pin 4) is the same.