9 pin D-SUB female connector at the UPS
|1||Battery Mode||out||This pin is shorted to PIN 5 (ground) if the mains power supply fails or is out of tolerance. (NORMALLY OPEN)|
|5||Ground||-||Ground terminal and common root of contacts at PIN 1, 8 and 9|
|7||UPS shut-down||IN||If a positive signal level (+5V to +12V DC) is applied, the UPS system switches off (PIN 5 is ground)|
|8||Battery Capacity Low||OUT||This pin is shorted to PIN 5 (ground) if the batteries have been discharged to such an extent that the remaining stored energy time is less than 2 minutes. (NORMALLY OPEN)|
|9||Battery Mode||OUT||The connection between this pin and PIN 5 (ground) is disconnected if the main power supply fails oe is out of tolerance. (NORMALLY CLOSED)|
Note: Direction is relative to UPS.