User manual

8
© 2006, Elektro-Automatik GmbH & Co. KG
Irrtümer und Änderungen vorbehalten
EN
© 2009, Elektro-Automatik GmbH & Co. KG
Operating the device
Attention! When grounding one of the output poles always
check if one of the poles of the load (eg. electronic load) is
also grounded. This could result in a short-circuit!
Attention! Notice the potential shift of the output poles when
using series connection! Grounding is hereby only recommen-
ded at the pole with the lowest potential against ground.
5.4 Terminal „Sense“ (Remote sense)
In order to compensate the voltage drop along the load leads (max.
1V per lead), the power supply can „sense“ the voltage at the load
instead at the output. It will regulate the output voltage to that the
desired voltage is provided to the load.
The remote sense feature is wired with correct polarity to the
terminal Sense.
(+) Sense must only be connected to (+) at the load
application and (–) Sense must only be connected to
(–)! Else both devices can take damage.
For additional information also see section „Remote sense ope-
ration“.
5.5 Interface card slot
The unit can be equipped with an optional interface card. The slot
to insert the card is located at the rear side. Further information
about the interface cards can be found in section „Digital interface
cards“.
6. Handling
6.1 The display
Figure 3 shows an overview of the LED displays, the LEDs and the
control panel. During normal operation, the displays show the actual
values of voltage (upper) and current (lower). In preset mode, the
displays show the set values of voltage or OVP (upper) and current
(lower), while in setup mode the upper display shows the selected
parameter and the lower one the related setting.
The status LEDs (to the right) indicate following:
CV - Voltage regulation active (only if output is „on“)
OT - Overtemperature error
OVP - Overvoltage error
CC - Current regulation active (only if output is „on“)
Rem - Remote control active (digital or analogue)
Local - LOCAL mode active
6.2 Pushbuttons on the control panel
Pushbutton Preset V/C/OVP
This button is used to switch to set values display (preset mode).
One push switches to the set values of U and I, a second push to
the set value (threshold) of the OVP. Hereby, in the lower display
the text „OVP“ is displayed. The LED above the button indicates
the preset mode. Set values can adjusted with both of the rotary
encoders between 0...100% for Unom or Inom, or between 0...110%
Unom for OVP. The values are instantly submitted.
A third push exits the preset mode. It also ends automatically if no
set value is changed for more than 5 seconds.
During remote control by analogue or digital interface the button is
used to display the set values that are currently given or set by the
controlling interface. When controlling with the analogue interface,
the OVP threshold can not be adjusted from external, so the display
shows the least adjusted value.
The pushbutton may be locked by the LOCK state. See below.
Pushbutton Memory M1...M5
Thispushbuttonhastwofunctions:iteitherselectsoneoftheve
memory sets with U, I, OVP for submission or it lets the device save
the memory sets. It only works if the output is switched off. The
memory mode is indicated by the LED above the button.
Available actions:
a) Select and submit
Outputoff,buttonpushedonce,thedisplayshowstherstmemory
set M1, indicated by shortly showing the set number as this:
!
Figure 3