Aplex Technology ARCHMI-707 - Manual (Page 30)

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7 HDMI1:
(HDMI 19P Connector), High Definition Multimedia Interface connector.
8. JP1:
(2.0mm Pitch 2x3 Pin Header),COM1 jumper setting, pin 1~6 are used to select signal out
of pin 9 of COM1 port.
JP1 Pin# Function
Close 1-2 COM1 RI (Ring Indicator) (default)
Close 3-4 COM1 Pin9=+5V (option)
Close 5-6 COM1 Pin9=+12V (option)
9. S_232:
(Switch), COM1 jumper setting, it provides selectable RS232 or RS422 or RS485 serial
signal output.
Function S_232 Pin#
RS232 (Default) ON: Pin1, Pin2, Pin3, Pin4
RS422 (option) OFF: Pin1, Pin2, Pin3, Pin4
RS485 (option) OFF: Pin1, Pin2, Pin3, Pin4
Note:
How to reach the switch position?
Step 1: Unscrew the storage cover