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Communication Interface (continued)
8-2 Dry Contact
NC ----------------- 1 6-------------- Low Battery
NC ----------------- 2 7-------------- NC
Shut Down-------- 3 8-------------- NC
AC Fail ------------ 4 9-------------- NC
Signal Ground ---- 5
Pin 4: Output signal transfers from HIGH to LOW when utility fails.
The pin is normally at high level.
Pin 6: Output signal transfers from HIGH to LOW upon low battery.
The pin is normally at a high level.
Pin 3: The UPS will shut down when a high level sustained for at least
3.8 seconds is applied.
Pin 5: Signal ground.
Other: Not used.
The communication port at the back of the UPS may be connected to a
computer. This port allows the computer to monitor the UPS and control the
operation of the UPS in some cases. Its major functions normally include
the following:
• To broadcast a warning when power fails.
• To close the files before the battery is exhausted.
• To turn off the UPS and computers.
Some computers may have a special connector to link this communication
port, or require a special plug-in card, or need a special UPS monitoring
software. Contact your dealer for details of different interface kits.
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