ADDITIONAL UPS FEATURES
ÊSerial Port
To establish communication between the UPS and a computer, connect your computer to the UPS serial port using the supplied communication cable.
When the communication cable is installed, HP Power Manager software can exchange data with the UPS. The software polls the UPS for detailed information on the status of the power environment. If a power emergency occurs, the software initiates the saving of all data and an orderly shutdown of the equipment.
The cable pins are identified in Figure 16, and the pin functions are described in Table 2.
UPS Rear Panel
6 | 7 |
| 8 | 9 |
1 | 2 | 3 | 4 | 5 |
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| Figure 16 Serial Port |
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Table 2 | Serial Port Pin Assignment |
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Pin | Signal Name | Function | Direction from | |
Number | the UPS | |||
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1 | Low Batt | Low battery relay contact; 20 mA, 30 Vdc | Out | |
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| contact rating |
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2 | TxD | Transmit to external device | Out | |
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3 | RxD | Receive from external device | In | |
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4 | DTR | PnP (Plug and Play) from external device | In | |
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| (tied to Pin 6) |
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5 | GND | Signal common (tied to chassis) | — | |
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6 | DSR | To external device (tied to Pin 4) | Out | |
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7 | — | No connection | — | |
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8 | AC Fail | AC fail relay contact; 20 mA, 30 Vdc | Out | |
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| contact rating |
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9 | Power Source | +V (8 to 24 volts DC power) | Out | |
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HP T750 G2, HP T750J, HP T1000 G3, HP T1000J, HP T1500 G3, and HP T1500J UPS Models User Guide S | 15 |