Toshiba 1800 manual RS-232C, Cts

RS-232C

RS-232C serial communication interface is a standard feature that can be used by authorized service personnel. It is provided through a DB9 female connector located on the back of the UPS (see “Layout “, page 15). This interface allows communication between the UPS and a personal computer. The chart below shows the signals and the connector pinout.

Pin	I/O	Symbol	Description	In the UPS
1		This pin not used		N/C	1
2	Input	RXD	Receive Data	RXD		2
3	Output	TXD	Transmit Data	TXD		3
						4
4	Output	DTR*	Data Terminal Ready
				GND		5
5	-	GND	Signal ground
6	Input	DSR*	Data Set Ready		6
7	Output	RTS**	Request to Send			7
8	Input	CTS**	Clear to Send			8
9		This pin not used		N/C		9

(*)(**) These pins are tied together internally in the UPS. Signals DTR, DSR, RTS, and CTS are not used.

DB9 Female Connector Outline (facing connector)

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