2. Hardware Installations
16
SPI-8150-LVA, SPI-8151-LVA
2.11 Serial Port connector: CN9 / CN10
COM1 and COM2 are 10-pins box-header, are onboard serial ports of the CPU
card SPI-8150/1-LLVA. The following table shows the pin assignments of these
connectors.
CN9: COM1 CN10: COM2
PIN
RS-232
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
CN9/CN10
1
6
5 10
10
N.C
N.C
N.C
* RS422/485 assigned for COM2 connector only
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.
