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Wiring
Section 3-3
13
Table 3.2: Pin layout of port COM1
3-3-2-2 COM2 port
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
Description
1
TX+
RS-422 tr
2
TXD
RS-232 transmit
3
RXD
RS-232 receive
4
RX+
RS-422 r
5
GND
Signal Ground
6
NC
Not connected
7
NC
Not connected
8
TX
−
RS-422 transmit -
9
RX
−
RS-422 receive -
shell
shield
Pin number
Pin name
Description
1
NC
Not connected
2
TXD
RS-232 transmit
3
RXD
RS-232 receive
4
NC
Not connected
5
GND
Signal Ground
6
NC
Not connected
7
NC
Not connected
8
NC
Not connected
9
NC
Not connected
shell
shield
Содержание NQ HMI
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