User manual

Page 37
EA Elektro-Automatik GmbH
Helmholtzstr. 31-33 • 41747 Viersen
Germany
Fon: +49 2162 / 3785-0
Fax: +49 2162 / 16230
www.elektroautomatik.de
[e-mail]
PSI 5000 A Series
3.6 Alarms and supervision
3.6.1 Denition of terms
Device alarms (see „3.3. Alarm conditions“)aredenedasconditionslikeovervoltageorovertemperature,which
can occur in relation to protection feature with partly adjustable thresholds.
The alarms are always indicated in the front display and are as well available as readable status via digital interface
when controlling or just monitoring remotely.
3.6.2 Device alarm handling
A device alarm incident will lead to DC output switch-off in most cases. The alarm must always be acknowledged,
which can only happen if the cause of the alarm is not persistent anymore. Ways to acknowledge:
• in manual control by switching the DC output on again or just by pushing button On/Off.
• indigitalremotecontrolbysendingaspeciccommandtoacknowledgealarms(ModBus),usually after the
actual alarm has been recorded.
Somedevicealarmsarecongurablebyadjustingathreshold.Thisisdescribedin„3.4.4. Manually congure
protections“:
Alarm Meaning Description Range
OVP
OverVoltage
Protection
TriggersanalarmiftheDCoutputvoltagereachesthedenedthreshold.
This can be caused by the device being faulty or by an external source.
The DC output will be switched off.
0 V...1.1*U
Nom
OCP
OverCurrent
Protection
TriggersanalarmiftheDCoutputcurrentreachesthedenedthreshold.
The DC output will be switched off.
0 A...1.1*I
Nom
OPP
OverPower
Protection
riggersanalarmiftheDCoutputpowerreachesthedenedthreshold.The
DC output will be switched off.
0 W...1.1*P
Nom
Thesedevicealarmscan’tbeconguredandarebasedonhardware:
Alarm Meaning Description
PF Power Fail
Only available with 640 W models.
ACsupplyover-orundervoltage.TriggersanalarmiftheACsupplyisoutofspecication
or when the device is cut from supply, for example when switching it off with the power
switch. The DC output will be switched off.
OT
OverTem-
perature
Triggers an alarm if the internal temperature reaches a certain limit. The device will also
stop supplying power for an uncertain time and until it has cooled down again, in order to
automatically continue supply afterwards.
SE Sense
Remote sense error. Triggers an alarm in case the remote sense connection to the load
or the sense bridges on the rear is interrupted (bridges have to be placed when remote
sense is not used) or in case the remote has reached the maximum possible compensa-
tion. This can only happen with the DC output being switched on. If the alarm occurs, the
DC output is not switched off. This is just to inform the user that the voltage on the load
can not be regulated to the adjusted output voltage.