
Table 10. RS-232 connector pin assignments
Pin
Signal name
Function
Direction from the
uninterruptible power
supply
1
Unused
Not applicable
2
Tx
Transmit to external device
Out
3
Rx
Receive from external device
In
4
Unused
Not applicable
5
GND
Signal common (tied to
chassis)
Not applicable
6
Unused
Not applicable
7
Unused
Not applicable
8
Unused
Not applicable
9
Unused
Not applicable
Note:
Unused pins must remain free on all models.
USB port
The uninterruptible power supply can communicate with a USB-compliant computer
by using the IBM UPS Manager software, which is compatible with a human
interface device (HID). To establish communication between the uninterruptible
power supply and a computer, connect the USB cable that comes with the
uninterruptible power supply to the USB port on the uninterruptible power supply.
Connect the other end of the USB cable to a USB port on a computer.
Chapter 4. Additional uninterruptible power supply features
31
Summary of Contents for 1500VA
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