Used to connect APC Smart UPSs to PCs.
APC Part Number: 940-0024B
| UPS end DB9 Male | PC end DB9 female | |
| 1 | 3 | Data from PC |
| 2 | 2 | Data to PC |
| 3 | ||
| 4 | ||
| 5 | ||
| 6 | ||
| 7 | ||
| 8 | ||
| 9 | 5 | GND |
PC end: pin 1 to pin 4
APC Part Number: 940-0024C
| UPS end DB9 Male | PC end DB9 female | |
| 1 | 3 | Data from PC |
| 2 | 2 | Data to PC |
| 3 | ||
| 4 | ||
| 5 | ||
| 6 | ||
| 7 | ||
| 8 | ||
| 9 | 5 | GND |
PC end: pin 1 to pin 4, pin 7 to pin 8
Comms at 2400BPS 8N1 Xon/Xoff No FIFO
Manually query the UPS with a terminal program using above settings.
Shift Y should get a 'SM' response.
Shift A should make UPS beep and flashes LEDs.