UPS devices  > Tripp-lite pinouts
Should work with Windows NT UPS Service
Signal Name
DB-9 Male
(UPS end)
DB-9 Female
(PC end)
Signal Name
Shutdown 2 4 DTR
PWR Fail 5 8 CTS
Common 1,4 5 GND

Pin 7 at the PC end (RTS) connected by R1 2k0 to pin 8 (CTS) and connected by R2 2k0 to pin 1(DCD)

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 1 reports in our database (1 positive and 0 negative) this pinout should be correct.

Is this pinout
Tripp-lite OmniPro-450 (675) WinNT Cable visual pinout:
Tripp-lite OmniPro-450 (675) WinNT Cable diagram
click to enlarge
Source(s) of this and additional information: UPS FAQ in russian
This page contain parts under Copyright © 2000-2018 by team.
No portion of this webpage may be reproduced in any form without providing visible HTML link to . Webmaster permission required in any other cases.
Efforts have been made to ensure this page is correct, but it is the responsibility of the user to verify the data is correct for their application.