User manual

53
© 2009, Elektro-Automatik GmbH & Co. KG
EN
Using the power supply
Output off (emergency off)
Pin „REM-SB“ is always operative and does not depend on the
remote mode. It can thus be used to switch off the output without
extra means, for example as an emergency power off function.
All the user has to do is to ensure the level of the input is held.
Remote control of current and voltage
Two potentiometers between VREF and ground, sliders at the
inputs VSEL and CSEL. The power supply can be controlled as
with the rotary encoders on the front and can either operate as
current or voltage source. In compliance with the max. 3mA for
the VREF output, potentiometers with at least 10kOhm have to
be used.
The power set value is here, for models with power regulation
feature, tied to VREF and thus 100%.
or
Remote control with power
Similiar to the example above, but with adjustable power limit.
Power adjustment only works at models from 1000W.
10. Miscellaneous
10.1 Remote sense
Remote sense operation is used to compensate voltage drops
along the leads between the power supply and the load. Because
this is limited to a certain level, it is recommended to match the
cross section of the leads to the output current and thus minimise
the voltage drop. On the frontpanel if the device there is a terminal
Sense where the sense leads are wired to with correct polarity.
The power supply will detect the external sense automatically
and compensate the output voltage by the actual voltage at the
load instead of the output. The output voltage will be raised by the
value of the voltage drop between power supply and load.
Maximum compensation: 1V per lead.
Seegure
10.2 Connecting different types of loads
Different types of loads, such as ohmic loads (lamp, resistor),
electronic loads or inductive loads (motor) behave differently and
can retroact to the power supply. For example, motors can induce
a countervoltage which may cause the overvoltage protection of
the power supply to shut off the output.
Electronic loads have regulator circuits for voltage, current and
power that can counteract to the ones of the power supply and
may result in increased output ripple or other, unwanted side
effects. Ohmic loads are nearly 100% neutral. It is recommended
to consider the load situation when planning applications.
10.3 Mains undervoltage or overvoltage occurs
ThedevicefeaturesanactiverecticationwithPFCandawide
range input. This means, it can be operated at input voltages of
approx. 90V...264V. Input voltages below 90V are considered as
blackout, respectively as complete switch-off and will store the
last condition, as well as switch off the power output.
Permanent input undervoltage or overvoltage must be
avoided!
Important! Models with 1500W nominal power will derate
the output power down to 1000W at input voltages below
approx.150V.