Com1/2 Connector - JHCTech ALAD-K2120T(P) User Manual

4 USB3.0 ports by type A connectors in rear IO. Please refer to Table 2.5 for their pin assignments.
Table 2.5: USB3.0 Port Pin Assignments
Pin
1
2
3
4
5
6
7
8
9
Shell

2.4.5 COM1/2 Connector

COM 1 and COM 2 are D-sub 9-pin connectors , they
BIOS setting. The serial ports are asynchronous communication ports with 16C550A-compatible UARTs
that can be used with modems, serial printers, remote display terminals, and other serial devices.
Table 2.6: COM1/2 Serial Port Pin Assignments
Pin/Type RS232 Signal
1 DCD
2 RXD
3 TXD
Figure 2.18 USB3.0 Connector
Signal Name
VBUS
D-
D+
GND
StdA_SSRX-
StdA_SSRX+
GND_DRAIN
StdA_SSTX-
StdA_SSTX+
Shield
1 2 3 4
6 7 8 9
Figure 2.19 COM1/2 Connector
RS422 Signal
TX-
TX+
RX+
17
can be configure as RS232/RS422 and RS485 by
5
RS485 Signal
DATA-
DATA+
NC
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