Current Sink
(Downprogramming) Capability
• 40 W/80 W High/Low
Voltage Outputs current
sink limits are fixed
approximately 10% higher
than the maximum current
source limits for a given
operating voltage at
any voltage above 2.5 V.
• 25 W Precision Outputs
can sink up to 0.5 A.
• 50 W Precision Outputs
can sink 1 A above 16 V
and 2 A below 16 V.
• All 662xA Outputs, when
the negative current limit is
reached, go into –CC mode
and the –CC status bit is set.
• N67xxA: Current sink is
limited by power. The
downprogrammer can
dissipate approximately 7 W
continuously. For example,
if the voltage at the output
terminals is 10 V the power
supply will limit the negative
current to approximately
0.7 A. When the voltage and
negative current combination
exceeds approximately 7 W
the power supply goes into
CP- mode and the CP- status
bit is set. The N675xA
modules can sink 7 A peak.
The N676xA modules can
sink 3 A peak.
Positive and Negative Voltages
The 662xA are capable of
producing either positive or
negative voltages by grounding,
or “commoning”, one of the
output terminals. The supply
can be operated with any
output terminal ±240 Vdc
(including output voltage)
from ground.
The N672xA have the same
capabilities.
Remote Voltage Sensing
40 W/80 W High/Low
Voltage Outputs:
The maximum voltage
available at the output
terminals during remote
sensing is the maximum
voltage rating plus one volt.
This allows a voltage drop
of 0.5 V per load lead, or 1 V
total, when the maximum
voltage is set.
25 W and 50 W
Precision Outputs:
The maximum voltage available
at the output terminals during
remote sensing is 50.5 V. This
allows a voltage drop of 0.25 V
per load lead, or 0.5 V total
when the maximum voltage is
set. The maximum voltage drop
in both leads cannot exceed
10 volts total or the overvoltage
protection circuit will shutdown
the power supply.
N67xxA Modules: The maximum
voltage available at the output
terminals during remote sensing
is the maximum voltage rating
plus 5 volts. This allows a volt-
age drop of 2.5 V per load lead,
or 5 V total, when the maximum
voltage is set.
Parallel Operation
662xA: Each output contains
an active downprogrammer
that is capable of sinking
current from only ONE identical
output, therefore, you can par-
allel no more than two outputs.
N67xxA: Each output contains
an active downprogrammer,
which limits the input current
(negative) to approximately
7 W depending on the voltage
at the output. Up to four
modules (same model numbers
only) can be paralleled for
more current. For example,
the N6724A’s four N6751A
modules can all be paralleled
for a maximum current of 20 A.
Series Operation
662xA: The outputs can be
connected in series to obtain
greater voltage capability.
Outputs connected in series
must have equivalent current
ratings. If the current ratings
are not equivalent, the higher
rated output could potentially
damage the lower rated output
by forcing excessive current
through it under certain load
conditions. Floating voltages
must not exceed 240 Vdc.
Therefore, no output terminal
may be more than 240 Vdc
from chassis ground.
N67xxA: The outputs have
the same capabilities when
used in series.
7
(6 pages)
(177 pages)
Manymanuals.com
Manymanuals.de
Manymanuals.fr
Manymanuals.it
Manymanuals.pl
Manymanuals.cz
Manymanuals.es
Manymanuals-pt.com
Comments to this Manuals