Rs232 Serial Port; Figure 2-7 Pins Of The Rs232 Serial Port Socket; Table 2-2 Meanings Of The Pins Of The Rs485 Serial Port Socket - Huawei EMU User Manual

2 Overview of the EMU
Table 2-2

Table 2-2 Meanings of the pins of the RS485 serial port socket

PIN
1
2
3
4
5
6
7
8
9

2.4.2 RS232 Serial Port

This describes the RS232 serial port on the EMU. An RS232 serial port is an RJ-45 socket and
suitable for a dedicated serial port cable that has an RJ-45 plug.
For the position of the RS232 serial port on the EMU, see
Figure 2-7

Figure 2-7 Pins of the RS232 serial port socket

2-8
lists the meanings of the pins of the RS485 serial port socket.
NOTE
The signals shown in this table are defined in terms of transmission and reception by the EMU.
l
When the TXD+ pin is connected to the RXD+ pin and the TXD- pin is connected to the RXD- pin,
l
the RS485 serial port can be used for two-wire connection.
The EMU works properly even if only one RS485 serial port is connected. It is recommended that you
l
use two RS-485 serial ports in active/standby mode. In this case, set serial port 1 to the active port.
shows pins of the RS232 serial port socket.
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Copyright © Huawei Technologies Co., Ltd.
Meaning
NULL
RX1+: positive reception terminal of serial
port 1
TX1+: positive transmission terminal of
serial port 1
RX2+: positive reception terminal of serial
port 2
TX2+: positive transmission terminal of
serial port 2
RX1-: negative reception terminal of serial
port 1
TX1-: negative transmission terminal of
serial port 1
RX2-: negative reception terminal of serial
port 2
TX2-: negative transmission terminal of
serial port 2
2.2 Exterior of the
EMU
User Guide
EMU.
Issue 13 (2009-12-30)