User Manual

Page 52
PS 9000 2U Series
www.elektroautomatik.de
[e-mail]
EA Elektro-Automatik GmbH
Helmholtzstr. 31-33 • 41747 Viersen
Germany
Fon: +49 2162 / 3785-0
Fax: +49 2162 / 16230
3.5 Alarms and monitoring
3.5.1 Denition of terms
Device alarms (see „3.2.4. Alarm conditions“)aredenedasconditionslikeovervoltageorovertemperature,sig-
nalled in any form to the user of the device in order to take notice.
Those alarms are always indicated in the front display as readable abbreviated text, as well as status readable via
digital interface when controlling or just monitoring remotely and, if activated, emitted as audible signal (buzzer).
Furthermore, the most important alarms are also signalled by output pins on the analog interface.
3.5.2 Device alarm handling
A device alarm incident will usually lead to DC output switch-off. 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
• in analog remote control by switching the DC output off (pin REM-SB = LOW) and on again (pin REM-SB = HIGH)
• indigitalremotecontrolbyreadingtheerrorbuffer(SCPIprotocol)orbysendingaspeciccommandtoac-
knowledge alarms (ModBus)
Somedevicealarmsarecongurablebyadjustingathreshold:
Alarm Meaning Description Range Indication
OVP
OverVoltage
Protection
Triggers an alarm if the DC output voltage exceeds 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
Display, analog
IF, digital IF
OCP
OverCurrent
Protection
Triggers an alarm if the DC output current exceeds the
denedthreshold.TheDCoutputwillbeswitchedoff.
0 A...1.1*I
Nom
Display, digital
IF
OPP
OverPower
Protection
riggers an alarm if the DC output power exceeds the
denedthreshold.TheDCoutputwillbeswitchedoff.
0 W...1.1*P
Nom
Display, digital
IF
Thesedevicealarmscan’tbeconguredandarebasedonhardware:
Alarm Meaning Description Indication
PF Power Fail
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.
Display, digital
IF
OT
OverTem-
perature
Triggers an alarm if the internal temperature exceeds a certain limit. The
DC output will be switched off.
Display, analog
IF, digital IF
► How to congure the device alarms OVP, OCP and OPP
1. Switch off the DC output and push button to call the setup menu.
2. In the menu navigate to “Settings” and push . Then in the submenu navigate to “Protection Settings”
and push again.
3. Set the limits for the equipment alarm relevant to your application if the default value of 110% of nominal is
unsuitable.
4. Accept the settings with or discard them with .
Those thresholds are reset to defaults when using the function “Reset Device” in setup menu.