| UPS Signal Name |
DB-9 Male (UPS end) |
DB-9 Female (PC end) |
PC Signal Name |
| Ground | 1 | 3 | |
| AC Fail | 5 | 8 | CTS |
| LOW BATT | 6 | 1 | DCD |
| Inverter shutoff- | 4 | 5 | GND |
| Inverter shutoff+ | 2 | 7 | this wire includes one 1N4148 or 1N4149 diode |< |
Two 10 k resistors present DB9F 8-4, 4-1. Pin 4 at the PC end (DTR) connected by R1 10kOhm to pin 8 (CTS) and by R2 10kOhm to pin 1(DCD)
PC End
1 - Black
3 - Brown
5 - Orange
7 - Red
8 - Yellow
Cover - Bare Metal
правильная
с ошибками