Orion Car Audio 1892 1335 manual Pin No RS232 RS422 RS485, Txb

Serial Port

9-way D-type male connector - NOT a standard serial port

vProtocol (RS232, RS422 or RS485) is fixed by soldered links. See page 10.

Pin No		RS232		RS422		RS485
1	SHDN	Modem on/off input
		If < 0.6V, Modem = OFF
		If o/c (internal pull-up to +5V) Modem = ON
2	RXD	Receive Data	OP	Receive Data	IO	Inverting
		output		inverting output		input/output
3	TXD	Transmit Data	IP	Transmit Data input	NC	No function
		input
4	TXB	Secondary	NC	No function	NC	No function
		Transmit Data
		input
5				0V
6		VSENSE External Battery Monitor input +50VDC max
7	RTS	RTS input	IP	Transmit Data	NC	No function
				inverting input
8	CTS	CTS output	OP	Receive Data	IO	Non-inverting
				output		input/output
9	RXB	Secondary	NC	No function	NC	No function
		Receive Data
		output

8 1892 1335 - Orion Radio Modem Operating Instructions - v1.3 / Aug 2006