Return Of Ac Input Power; Ups Remote Control Functions - HP 1U User Manual

4. Operation
Low-battery warning
• The and
• The audio alarm beeps every three seconds.
• The remaining battery power is low. Shut down all applications on the connected equipment because
automatic UPS shutdown is imminent.
End of battery backup time
• LCD displays "End of backup time."
• All the LEDs go off.
• The audio alarms stops.

4.5 Return of AC input power

Following an outage, the UPS restarts automatically when AC input power returns (unless the restart
function has been disabled) and the load is supplied again.

4.6 UPS remote control functions

The 1U UPS offers a choice between two remote control functions.
• RPO: Remote Power Off allow a remote contact to be used to disconnect all the equipment connected
to the UPS. Restarting the UPS requires manual intervention.
• ROO: Remote On/Off allows remote action of the
These functions are obtained by opening a contact connected between the appropriate pins of connector (4) on the rear
panel of the UPS.
4
Remote control connection and test
1. Check that the UPS is off and disconnected from the AC input source.
2. Remove connector
3. Connect a normally closed volt-free contact (60 Vdc/30 Vac max., 20 mA max., 0.75 mm
between the two pins of connector
4
4
4. Plug connector
5. Connect and restart the UPS following the previously described procedures.
6. Activate the external remote shutdown contact to test the function.
Warning. This connector must only be connected to SELV (Safety Extra-Low Voltage) circuits.
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indicator illuminates.
4
.
4
.
4
Contact open: UPS shutdown
Contact closed: UPS start up (UPS connected to AC power and AC power is available)
Note: The local on/off control using the
Contact open: UPS shutdown, LED
To return to normal operation, deactivate the remote external contact and restart
the UPS by pressing the
4 into the back of the UPS.
button to shut down the UPS.
button overrides the remote-control function.
illuminates.
button.
[18 AWG] cable cross-section)
2
792518-001 Edition 1