Datasheet

LD400 & LD400P Electronic DC Loads | 80 amps, 80 volts, 400 watts
Versatile solution for testing dc power sources
Constant current, resistance, conductance, voltage and
power modes
Wide voltage and current range, 0 to 80V and 0 to 80A
400 watts continuous dissipation at 28
o
C (360W at 40
o
C)
600 watts short-term dissipation (up to 60 seconds)
Low minimum operating voltage of <1V at 40A
High resolution and accuracy for level setting
Built-in transient generator with variable slew
Current monitor output for waveform viewing
Variable drop-out voltage for battery testing
High resolution backlit graphic LCD with soft key control
Analog remote control of levels and TTL control of on/off
and transient switching
Front and rear input terminals (front terminals 30A max.)
Full bus control via USB, RS232, GPIB and LXI compliant
LAN interfaces (LD400P)
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Compact electronic DC load
The LD400 is an inexpensive electronic load which is suitable for
testing and characterising a wide variety of dc power sources.
It can be used to investigate the behaviour of many different
types of power source such as batteries and solar cells, as well as
electronic power supply units.
Its wide voltage/current range, multiple operating modes and built-
in transient generator give it the versatility to offer test solutions
from the design laboratory through to the component test area.
The LD400P adds full bus remote control via USB, RS-232, GPIB and
LAN (Ethernet) interfaces.
Low minimum operating voltage
The LD400 can operate at voltages below 500mV for currents up to
10 amps. At higher currents the fixed minimum resistance (typically
better than 25mW) gradually raises the minimum operating voltage,
but it remains below 1 volt up to 40 amps and below 2 volts up to
80 amps.
This low operating voltage allows it to be used for many low voltage
applications for which other electronic loads are unsuitable.
600 watts intermittent power
The LD400 can operate at power levels up to 600 watts for periods
of up to 1 minute.
Short term loading can be sufficient for many testing applications and
significantly extends the usefulness of the LD400.