EFX48 e-Fuse System Operation
Copyright © 2019 Eaton Corporation. All Rights Reserved.
IPN March 2019
115
Output fail alarm
Alarm trigger
When output is off and the measured current is greater than 3A the
load fail alarm is raised
Alarm cancel
The load fail alarm is cancelled when conditions that raised it have
ceased
Action required
If this alarm does not self-clear then the EFX48 needs to be replaced
Output disc alarm
Alarm trigger
When any load is disconnected for any reason other than being in
button state off or having tripped then the load disconnected alarm is
raised
Alarm cancel
The load disconnected alarm is cancelled when the condition for
raising it ceases
GPIO Digital Input alarms
GPIO1, GPIO2, GPIO3, GPIO4, GPIO5 Digital input 1-5 alarms
Alarm trigger
When any GPIO is set as a digital input and has been in the active
state for greater than the DI dwell time (individually settable for each
GPIO DI) then if set as ‘battery disconnect function’ this will be
actioned, after a further time (global alarm qualification period) any
set alarm and DO destination(s) will be actioned (outputs activated
and SNMP message issued)
Alarm cancel
When a GPIO input has been in the non-active state for greater than
the set DI dwell time then if set as battery disconnect function this
will be released, after a further time (global alarm qualification period)
the set alarm will cancelled (outputs de-activated and SNMP message
issued)
Rectifier alarms
Rectifier single fail alarm (Rect fail)
Alarm trigger
If one and only one rectifier reports that it is in a fail condition then
the rectifier single fail alarm is raised
Alarm cancel
When no rectifiers report a fail condition then the alarm is cancelled
Action required
Replace the faulty rectifier. Check the status of the LEDs on the
rectifiers in order to identify which one is faulty.
Rectifier multiple fail alarm (Multi rect)
Alarm trigger
If more than one rectifier reports that it is in the fail condition then
the rectifier multiple fail alarm is raised
Alarm cancel
When no rectifiers or only one report a fail condition then the alarm is
cancelled
Action required
Replace both rectifiers
Rect temp, Rectifier high temperature alarm
Alarm trigger
If any rectifier(s) reports a high temperature condition then the
rectifier high temperature alarm is raised
Alarm cancel
When no rectifiers report a high temperature condition then the alarm
is cancelled
Action required
If the alarm does not self-cancel then replace the faulty rectifier. Check
the status of the LEDs on the rectifiers in order to identify which one
is faulty.
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