IEI Technology IMBA-9454ISA, User Manual

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IMBA-9454ISA ATX Motherboard
Page 74
CN Location: See Figure 4-19
CN Pinouts: See Table 4-21
The 14-pin serial port connector connects to the COM 2 serial communications channels.
COM 2 is a multi function channel. In default mode COM 2 is an RS-232 serial
communication channel but, with the COM 2 function select jumper, can be configured as
either an RS-422 or RS-485 serial communications channel.
Figure 4-19: RS-232/422/485 Serial Port Connector Location
PIN NO. DESCRIPTION PIN NO. DESCRIPTION
1 DCD 2 DSR
3 RXD 4 RTS
5 TXD 6 CTS
7 DTR 8 RI
9 GND 10 GND
11 TX+ 12 TX-
13 RX+ 14 RX-
Table 4-21: RS-232/RS-485 Serial Port Connector Pinouts
4.2.19 Serial Port Connector (COM 2)( RS-422 or RS-485 only)
CN Label: CN1
CN Type: 4-pin header (1 x 4)