Omron NQ HMI Getting Started Manual page 27

Wiring
3-3-2-2 COM2 port
Table 3.2: Pin layout of port COM1
Pin number Pin name
1
2
3
4
5
6
7
8
9
shell
COM2 is a RS-232 communication port. It communicates with external
peripherals at baud rates of 4800 kbps to 115.2 kbps with None, Even or Odd
parity.
The connector is a standard D-type 9-pin female connector (see Figure 3.6: 9-
pin sub-D connector) with pin layout as shown in Table 3.3: Pin layout of port
COM2.
/i
Table 3.3: Pin layout of port COM2
Pin number Pin name
1
2
3
4
5
6
7
8
9
shell
Description
TX+ RS-422 transmit +
TXD RS-232 transmit
RXD RS-232 receive
RX+ RS-422 receive +
GND Signal Ground
NC Not connected
NC Not connected
TX− RS-422 transmit -
RX− RS-422 receive -
shield
Description
NC Not connected
TXD RS-232 transmit
RXD RS-232 receive
NC Not connected
GND Signal Ground
NC Not connected
NC Not connected
NC Not connected
NC Not connected
shield
Section 3-3
13