DB-9 Pinouts
Pin Number |
Pin Name |
Description |
---|---|---|
n/a | Shield | Frame/case ground. |
1 | Frame Ground | Frame/case ground. |
3 | Remote Shutdown | If a positive signal level (+5V to +12V DC) is applied for at least 1 seconds, while the UPS is operating on battery, shuts the UPS off after 120 seconds. |
4 | Normally Closed On-Battery Contact | A normally closed contact that opens (releases from Common) after the UPS switches to battery power. |
5 | Signal Ground (Common) | The signal ground for all signal pins. |
7 | Normally Open Low-Battery-Alarm Contact | A normally open contact that closes (pulls to Common) during a Low Battery Alarm. |
9 | Normally Open On-Battery Contact | A normally open contact that closes (pulls to Common) after the UPS switches to battery power. |
Contacts consist of open collector circuits capable of switching up to +30 VDC, 6 mA resistive load.
Note: for additional information how to connect this UPS to the computer, please look APCUPSD Voltage Signalling Simple-Custom Cable for MGE Pulsar EL 7.