Description of device terminal
3 Serial port Module
The serial port module terminal is green 20-wire Phoenix terminal, which is for
the use of RS232 and RS485 of 6 serial ports and the common terminal of
two methods shall be selected by dialing up or jumper on the panel. See table
2 for the terminal definition.
Table 2 Serial port module terminal definition description
Serial No.
1 2 3 4 5 6 7 8 9 10
Mark
A1 B1 GND A2 B2 GND A3 B3 GND A4
Serial No.
11 12 13 14 15 16 17 18 19 20
Mark
B4 GND A5 B5 GND A6 B6 GND NC NC
Meanwhile, there is a small table on the baffle on the top of the module
terminal, indicating the corresponding relation of AX and BX above under
RS232 and RS485 working mode as shown in table 3.
Table 3 Serial port module working mode definition
A B
RS232 RXD TXD
RS485 A B
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