User manual

Page 29
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
3.4.4 Manually congure protections
Along with adjustable set values, the device offers excess protections related to voltage, current and power, which
areintendedtoprotectthepossiblyexpensiveloadhardware.Theyarecongurableinformofadjustablethresh-
olds that the device supervises and in case of excess it will switch off the DC output. Those protections are OVP
(overvoltage protection), OCP (overcurrent protection) and OPP (overpower protection). Any of these values is
adjustable between 0% and 110% of the related nominal value.
The thresholds are manually adjustable at any time. There is a dedicated mode OVP/OCP which can be accessed
via the equally named pushbutton.
The control panel lock (see 3.4.7) can block the user from adjusting the thresholds.
► How to manually adjust the thresholds of OVP and OCP
1. In normal operation, push button OVP/OCP once to enter OVP/OCP
adjustment mode
2. The display switches to show the OVP and OCP thresholds, as indicated
in the example screenshot to the right.
3. Adjust those values as desired, like when adjusting voltage or current.
The adjustment range here is 10% bigger so the thresholds can also
be adjusted above the maximum voltage or current.
4. Leave this adjustment mode by pressing button OVP/OCP again.
► How to manually adjust the threshold of OPP
1. In normal operation, press button OVP/OCP once. After this, push both
rotary knobs simultaneously to enter OPP adjustment mode. This
modecanalsobereachedbydoingitviceversa,meansrsttopush
both knobs and then pushbutton OVP/OCP.
2. The display switches to show the OPP threshold (unit W), as indicated
in the example screenshot to the right.
3. Adjust the value like you would adjust the power set value. The adjustment range here is 10% bigger so the
threshold can also be adjusted above the maximum power.
4. Leave this adjustment mode again by pressing button OVP/OCP and then pushing both rotary knobs si-
multaneously. Or do it vice versa.
With the DC output being switched on, the thresholds immediately become effective while
adjusting and they might generate an alarm, in case any of these three thresholds is adjusted
lower than the related set value.
The value OVP and OCP are part of the recall sets (see 3.4.6), the value OPP is not.
3.4.5 Switching the DC output on or off
The DC output of the device can be manually or remotely switched on and off. Switching it on can be restricted in
manual operation by the control panel being locked (see 3.4.7), whereas switching it off manually is always pos-
sible for safety reasons, unless the device is in remote control.
Switching the DC output on during manual operation or digital remote control can be disabled by
pin REM-SB of the built-in analog interface. For more information refer the example a) in 3.5.4.6.
► How to manually switch the DC output on or off
1. As long as remote control is not active, push button On/Off anytime to switch the DC output off, in case it is
on. As long as the control panel (HMI) is not locked, press the button anytime to switch the DC output on,
in case it is off.
2. The button toggles between the two states, as long as a change is not restricted by an alarm or the device
being in “remote” mode. The current condition is displayed as “On” or “Off”.
► How to remotely switch the DC output on or off via the digital interface
1. See the external documentation “Programming Guide ModBus & SCPI” if you are using custom software,
or refer to the external documentation of LabView VIs or other software provided by the manufacturer.