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Chapter 2
Basic Functions
Alarm Occurrence and Clearing Alarms
Alarm Occurrence
When a protection function is activated, RMX programmable power supplies behave as follows.
Figure 2-13.
OHP Alarm Indication with Output Off
Figure 2-14.
OHP Alarm Indication with Output On
•
The output turns off. CONFIG setting CF03 allows the user to set the error clearing method
for overheat protection (OHP), fan failure protection (FAN), and low AC input protection
(AD-FAIL) errors. When CF03 is set to Auto, the output will automatically turn back on
when the problem that caused the alarm is fixed. When CF03 is set to Safe, the output will
remain off even after the problem that caused the alarm is resolved. This parameter is the
same for the OHP, FAN, and AC-FAIL alarms. You cannot set this parameter separately for
each protection function.
•
The ALARM LED in the front panel display area lights to indicate that an alarm has
occurred. The voltmeter display indicates the cause of the alarm.
•
The ALARM LED on the front panel blinks only when a POWER LIMIT alarm has
occurred.
•
The OUTPUT LED on the front panel blinks orange only when a protection function has
been activated while the output is on.
If the RMX programmable power supply is set so that output turns on automatically after
the problem that caused the alarm is fixed (CF03: Auto), the OUTPUT LED lights
automatically when the problem that caused the alarm is fixed. If the RMX programmable
power supply is set so that output remains off even after the problem is fixed (CF03:
SAFE), the OUTPUT LED remains off even after the problem that caused the alarm is
fixed.
•
The alarm signal is generated from pin 14 of the J1 connector (when the OVP/ OVP2/OCP/
OHP/ OHP2/ FAN/ SEN/ AC-FAIL/ SD/ WATCHDOG has been activated).
Note
When a CONFIG parameter is being displayed, only the ALARM LED turns
on; the cause of alarm is not displayed. To view the cause of the alarm, exit from the
CONFIG parameter display.
Lit
Lit
Blinking (in orange)
