Aplex Technology ARCHMI-707 - Manual (Page 32)

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Step 5: The function switch setting shows up
10. S_422:
(Switch), COM1 setting, it provides selectable RS232 or RS422 or RS485 serial signal output.
Function S_422
RS232 (Default) OFF: Pin1, Pin2, Pin3, Pin4
RS422 (option) ON: Pin1, Pin2, Pin3, Pin4
RS485 (option) ON: Pin1, Pin2, Pin3, Pin4
11. COM1:
(Type DB9),Rear serial port, standard DB9 Male serial port is provided to make a direct connection to
serial devices. COM1 port is controlled by pins No.1~6 of JP1, select output Signal RI or 5V or 12V, For
details, please refer to description of JP1 and S_232 and S_422 setting.
RS232 (Default):
Pin# Signal Name
1 DCD# (Data Carrier Detect)
2 RXD (Received Data)
3 TXD (Transmit Data)
4 DTR (Data Terminal Ready)
5 Ground
6 DSR (Data Set Ready)
7 RTS (Request To Send)
8 CTS (Clear To Send)
9 JP1 select Setting (RI/5V/12V)