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.
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