ROM-2820 COMA

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COMA (RS232/RS422/RS485)
Pin	Signal	Pin	Signal
1	+12V	2	GND
3	RS232 TXD or 422/485RX+	4	RS232 RXD or 422/485TX+
5	GND	6	-
7	RTS#	8	CTS#
9	-

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