2
Installation
32
Series N5700 User’s Guide
Setting up the Slave Units
Set the rear panel setup switch SW1 position 2 to it’s up position.
Connect J1 pin 10 (Current Program) of the slave unit to J1 pin 25
(Parallel) of the master unit. Also connect a short between J1 pin 8
and J1 pin 12. The output voltage of the slave units should be
programmed
higher
than the output voltage of the master unit to
prevent interference with the master unit’s control. The current limit
of each unit should be programmed to the desired load current limit
divided by the number of parallel units.
Setting the Over-Voltage Protection
The master unit OVP should be programmed to the desired OVP level.
The OVP of the slave units should be programmed to a
higher
value
than the master. When the master unit shuts down, it programs the
slave unit to zero output voltage. If a slave unit shuts down when its
OVP is set lower than the master output voltage, only that unit shuts
down and the remaining slave units will supply all the load current.
Setting the Over-Current Protection
Over-current protection, if desired, may only be used with the
master
unit. When the master unit shuts down, it programs the slave units to
zero output voltage.
Series Connections
WARNING
SHOCK HAZARD
For models up to 60 VDC rated output, no point on the output shall be more
than ±60 VDC above or below chassis ground.
For models greater than 60 VDC rated output, no point on the Positive output
shall be more than ±600 VDC above or below chassis ground.
For models greater than 60 VDC rated output, no point on the Negative output
shall be more than ±400 VDC above or below chassis ground.
CAUTION
Only power supplies that have identical voltage and current ratings can be
connected in series.
Two units of the same voltage and current rating can be connected in
series to provide up to two times the output voltage capability.
Because the current is the same through each element in a series
circuit, outputs connected in series must have equivalent current
ratings. Otherwise, the higher rated output could potentially damage
the lower rated output by forcing excessive current through it under
certain load conditions. Refer to the following figures for typical
series connections using either local or remote sensing.
