connector or cable wiring Should work with Windows NT UPS Service
9 pin D-SUB male connector to the UPS
9 pin D-SUB female connector to the computer
| UPS Signal Name | DB-9 Male (UPS end) | DB-9 Female (PC end) | PC Signal Name | |————-|———–|————-|————-| | Shutdown | 2 | 4 | DTR | | PWR Fail | 5 | 8 | CTS | | LOW BATT | 6 | 1 | DCD | | 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)
- Power_Failure - Negative, Low_Battery - Negative, UPS_Shutdown - Positive.