Omega OMG-USB-SER-4 manual Technical Description, Features, RS-232 DB-9 Male

Technical

Technical Description

The OMG-USB-SER-4utilizes four USB UARTs. These chips feature programmable baud rate, data format, 128 byte Dual Port TX Buffer, and 384 byte Dual Port RX Buffer. The RS-232/422/485 transceiver supports data rates up to 921.6K baud for RS-422/485 and 460.8K baud for RS-232.

Features

∙Hot pluggable device that does not require opening the case

∙No system resources are required (i.e. I/O ports or IRQ’s)

∙LED status indicators for USB Enabled and port activity

Connector Pin Assignments
RS-422/485		(DB 9 Male)
	Signal		Name		Pin #	Mode
	GND		Ground	5
	TX +		Transmit Data Positive	4		Output
	TX-		Transmit Data Negative	3		Output
	RTS+		Request To Send Positive	6		Output
	RTS-		Request To Send Negative	7		Output
	RX+		Receive Data Positive	1		Input
	RX-		Receive Data Negative	2		Input
	CTS+		Clear To Send Positive	9		Input
	CTS-		Clear To Send Negative	8		Input
RS-232		(DB-9 Male)
	Signal		Name		Pin #	Mode
	GND		Ground		5
	TX		Transmit Data		3	Output
	RTS		Request To Send		7	Output
	DTR		Data Terminal Ready		4	Output
	RX		Receive Data		2	Input
	CTS		Clear To Send		8	Input
	DSR		Data Set Ready		6	Input
	DCD		Data Carrier Detect		1	Input
	RI		Ring Indicator		9	Input

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