Additional UPS Features
The Powerware 5125 is
To establish communication between the UPS and a computer, connect your computer to the UPS communication port using the supplied communication cable.
When the communication cable is installed, power management 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 15 and the pin functions are described in Table 1.
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| 5 | 4 | 3 | 2 | 1 |
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| 9 | 8 | 7 | 6 |
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| Figure 15. Communication Port |
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Table 1. Communication Port Pin Assignment |
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Pin | Signal Name | Function |
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| Direction |
Number |
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| from the UPS |
1 | Low Batt | Low Battery relay contact | Out | ||||
2 | RxD | Transmit to external device | Out | ||||
3 | TxD | Receive from external device | In | ||||
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) | — | ||||
6 | DSR | To external device (tied to Pin 4) | Out | ||||
7 | RTS | PnP from external device | In / Out | ||||
8 | AC Fail | AC Fail relay contact |
| Out | |||
9 | Power Source | +V (8 to 24 volts DC power) | Out | ||||
30 | Powerware® 5125 Tower |