UPS devices  > Tripp-lite pinouts
Part# 73-0743 (SmartPro UPS). Should work with PowerAlert software.
UPS
Signal Name
DB-9 Male
(UPS end)
DB-9 Female
(PC end)
PC
Signal Name
Tx 7 2 RxD
Rx 9 3 TxD
Common 8 5 GND

Pins 7 and 8 shorted at the PC end of the connector.

Pins 1 and 4 and 6 shorted at the PC end connector.

9 pin D-SUB male connector layout
9 pin D-SUB male connector
at the UPS
9 pin D-SUB female connector layout
9 pin D-SUB female connector
at the computer
According to 4 reports in our database (4 positive and 0 negative) this pinout should be correct.

Is this pinout
Tripp-lite SmartPro Cable visual pinout:
Tripp-lite SmartPro Cable diagram
click to enlarge
Source(s) of this and additional information: UPS FAQ in russian
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