B&B Electronics ESR904W DB-9 Pin-outs for RS-232 and RS-232/422/485 Connections, DB-9M RS-232

RS-232/422/485 Connections

Appendix B: RS-232/422/485 Connections

DB-9 Pin-outs for RS-232 and RS-232/422/485 Connections

DB-9M	RS-232	RS-232	DTE	RS-422	RS-485
Pin	Signal Name
1	Carrier Detect	DCD	In	TXDA(-)
2	Receive Data	RXD	In	TXDB(+)
3	Transmit Data	TXD	Out	RXDB(+)	DATA B(+)
4	Data Terminal Ready	DTR	Out	RXDA(-)	DATA A(-)
5	Signal Ground	GND	---	GND	GND
6	Data Set Ready	DSR	In
7	Request To Send	RTS	Out
8	Clear To Send	CTS	In
9	Ring Indicator	RI	In

Figure 19. DB-9 Pin-outs for RS-232/422/485

RS-232/422/485 Connections

Terminal Block Pin-out for RS-422 and RS-485

(Vlinx ESR901W485 only)

				T
					X
						D
							B(
				T					+)		1
R						X
						D
X								A(
	D								-)		2
		+
		B(		)/
					D
R						a
							t
	X						a
								(
		D	(-						+		3
										)
		A			)/
					D
						a
							t
								a
									(
									-)		4
					G
						N
							D				5

Terminal	22	RS-422	RS-485	RS-485
		Signal Name
				Signal Name
1	(+)	Transmit Data (+)	--	--
2	(-)	Transmit Data (-)	--	--
3	(+)	Receive Data (+)	Data(+)	Data(+)
4	A(-)	Receive Data (-)	Data(-)	Data(-)
5	D	Signal Ground	GND	Ground

Figure 20. Terminal Block Pin-out for Vlinx ESR901W485 Serial

Connection

			32	Appendix B	Documentation Number: ESR90xW-4905m
Documentation Number: ESR90xW-4905m	Appendix B	31

B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104 – www.bb-elec.com	B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104 – www.bb-elec.com
B&B Electronics Ltd – Westlink Commercial Park – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445 – www.bb-europe.com	B&B Electronics Ltd – Westlink Commercial Park – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445 – www.bb-europe.com