APC Smart UPS cable pinout

connector or cable wiring

UPS Signal Name	DB-9 Male (UPS end)	DB-9 Female (PC end)	PC Signal Name
TX / AC Fail	2	2	Rx, Received Data
RX / Shutdown	1	3	Tx, Transmitted Data
Common	9	5	GND

At the PC end: pins 1,4 (DCD, DTR) shorted; pins 7,8 (RTS, CTS) shorted.

9 pin D-SUB female connector
to the PC

Pinouts.ru > GPS, UPS, Switches and other devices cables and adapters schematics > Pinout of APC Smart UPS cable and layout of 9 pin D-SUB male connector and 9 pin D-SUB female connector	Document status:	correct
Source(s) of this and additional information: UPS FAQ in russian	21 reports
Last updated at Sat Jun 25 2005. Submit additions or corrections for this document.	Is this document correct or incorrect? What is your opinion?

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