Datasheet

Figure 2. Output sequencing
Module 1
Output on
V1
V2
V3
Module 2
Delay 2
Delay 3
Module 3
Output Sequencing
Each DC power module or electronic load
can be individually set to turn on or to turn
off with a delay. By adjusting the delay
times and then commanding the N6700 to
turn on, you can set the N6700 modules
to sequence on in a particular order. The
same sequencing capability is available
to shut down the modules in a particular
order.
For applications that require more than
four DC power or electronic load modules
to be sequenced, this output sequencing
can be extended across multiple N6700
mainframes. When the I/O ports on the
rear panel of the main-frames are wired
together, a pair of synchronization signals
can be sent between mainframes, allowing
the output sequences of all mainframes
to be synchronized. This capability is sup-
ported on N6700C, N6701C and N6702C
mainframes.
Programmable Slew
For some applications, like inrush limiting
or powering rate-sensitive devices, it is
necessary to slow down and control the
speed of the power supply to maintain
a specific voltage slew rate. The N6700
provides programmable voltage slew
rate, so that you can easily control the
speed at which the output slews from one
voltage to another. You can set the speed
of a voltage change anywhere from its
maximum up/down programming speed
to its slowest change of up to 10 seconds.
Programmable voltage slew is available
from the front panel when operating the
N6700 manually or via computer control.
For the electronic load family, slew control
is available for voltage or current or
resistance or power.
Series Operation
To increase available voltage and power,
similarly rated outputs can be operated
directly in series on power supply modules.
Easy Parallel Operation With
Virtual Channels
To increase available output power and
current, identical outputs can be operated
in parallel. To simplify parallel operation
for applications requiring currents greater
than any single output can provide, the
N6700 offers virtual channels, a firmware-
based feature that allows the N6700 system
to treat up to 4 channels as a single,
synchronized channel. Once configured,
all functions (sourcing, measurements,
triggering, protection, and status monitor-
ing) behave as if there is 1 channel of up
to 4 times the capacity of a single channel,
without writing a single line of code to
manage the interaction and synchroniza-
tion of the paralleled power supplies or
electronic loads.
Virtual channel capability is available from
the front panel when operating the N6700
manually or via computer control.
Power Management Feature
Allows You Allocate Mainframe
Power
Often, a DUT requires a single high power
DC source and several very low power DC
sources. Since the DUT does not require
full power to all outputs, you may choose
to save money configuring a system where
the sum of the power modules installed
in a mainframe exceeds the total power
available from the mainframe. In this case,
the power management features of the
N6700 allow you to allocate mainframe
power to the outputs where it is needed,
achieving maximum asset utilization and
flexibility. This feature provides safety from
unexpected and dangerous shutdowns
that can occur with power systems without
power management when operated in a
similar way.
For example, if your DUT requires 280 W
on its main input, and 10 W each on three
auxiliary inputs, you can configure a
system consisting of one 300 W DC
module and three 100 W DC modules.
Even though the sum of the module power
is 600 W, you can still use the N6700C
400 W MPS mainframe. Thanks to the
power management feature, you can al-
locate the full 300 W to the 300 W module
while you allocate only 33 W to each of the
100 W modules.
Note that if you install one of the new
500 W modules in an N6700C 400 W MPS
mainframe, you cannot run this module at
its full rated output power.
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