Serial Port Connector (Rs-232); Figure 3-16: Serial Port (Com3) Connector Pinout Locations; Figure 3-17: Serial Port (Com2) Connector Location; Table 3-15: Serial Port Connector Pinouts - IEI Technology KINO-PVN-D5251 User Manual

Figure 3-16: Serial Port (COM3) Connector Pinout Locations

Pin Description
1 Data Carrier Direct (DCD)
3 Receive Data (RXD)
5 Transmit Data (TXD)
7 Data Terminal Ready (DTR)
9 Ground (GND)

Table 3-15: Serial Port Connector Pinouts

3.2.13 Serial Port Connector (RS-232)

CN Label: COM2
CN Type: 14-pin header (2x7)
CN Location: See Figure 3-17
CN Pinouts: See Table 3-16
Used for RS-232/422/485 communications.

Figure 3-17: Serial Port (COM2) Connector Location

Pin Description
1 DCD
3 RXD
5 TXD
7 DTR
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KINO-PVN-D5251/D4251/ Mini ITX SBC
Pin Description
2 Data Set Ready (DSR)
4 Request To Send (RTS)
6 Clear To Send (CTS)
8 Ring Indicator (RI)
10 N/C
Pin Description
2 DSR
4 RTS
6 CTS
8 RI