Sentry PTPD-H0, Installation And Operation Manual, Page: 15 / 26

Alarm Status field
The display-only Control Status field indicates the PTPD ’s current alarm state.
Alarm Status Field Values
Display Description
No Alarm Current PTPD load is under overload threshold setting.
ALARM -> Over Threshold Current PTPD load exceeds overload threshold setting.
ALARM (Cleared) -> Over Threshold Alarm reset - Current PTPD load exceeds overload threshold setting.
Power Tower PDU Version 1.0b
Location:
Input Current: 20.25 Amps
Alarm Status: ALARM -> Over Threshold
Threshold: 20 Amps
Press ‘C’ to clear Alarm
Press ‘L’ to edit Location
Press ‘T’ to adjust Threshold
Press ‘Enter’ to refresh
Figure 3.2 Example Control Screen in an over-threshold condition
Clearing an Over-Threshold Alarm
The over-threshold alarm may be cleared from the Control Screen or by pressing the Alarm Reset button.
Clearing the alarm resets both the audible alarm and the contact-closure alarm output.
NOTE: The alarm is automatically cleared if the Input Current returns to 1/8 ampere below the overload threshold.
To clear an alarm from the Control Screen:
Type c .
To clear an alarm using the reset button:
On the front of the PTPD, locate the recessed reset button directly below the Input Current LED. You
will need a non-conductive, non-metallic tool that fits inside the recess.
Insert the tool, then depress and hold the reset button until the audible alarm is silenced.
NOTE: The reset button should be released immediately after the audible alarm is silenced. Failure to release within 7
seconds will result in resetting the PTPD to factory defaults. See Appendix A: Resetting to Factory Defaults for more
information.
Power Tower PDU Version 1.0b
Location:
Input Current: 20.25 Amps
Alarm Status: ALARM (Cleared) -> Over Threshold
Threshold: 20 Amps
Press ‘L’ to edit Location
Press ‘T’ to adjust Threshold
Press ‘Enter’ to refresh
Figure 3.3 Example Control Screen with a cleared over-threshold condition.
Ending a Session
Sessions are ended automatically after each refresh of the Control Screen.
Sentry Power Tower Power Distribution Unit Operations (PTPD-x0 models only)
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Installation and Operations Manual