M520086-01
3-9
NOTE
The following modes of operation are used for
applications requiring more current or voltage than
is available from a single power supply. To meet
the requirements for greater output voltage or
current, two or more supplies may be connected in
series or parallel.
3.1.6
Auto-Parallel Operation
In the auto-parallel mode of operation, a master/slave configuration is established.
CAUTION
When using two or more supplies in parallel,
damage may occur to slave(s) crowbar circuits if
slave overvoltage level is set lower than the level
set on the master. To prevent damage, set all
slave units overvoltage-set potentiometers fully
clockwise; and set the master unit to the desired
trip level. If overvoltage protection is not desired,
set to trip at maximum rated voltage (less than fully
clockwise).
To set up the auto-parallel mode of operation, connect all outputs in parallel to the load.
Connect jumper from master TB1-12 to slave TB1-9 and TB1-10. Remove jumper between
slave TB1-8 and TB1-9. Rotate slave voltage control potentiometers to maximum, and
adjust current control potentiometers for balanced output currents during operation. Once
adjusted, output currents will track automatically. If tracking is not close, perform the
calibration procedures listed in Chapter 4. See Figure 3-10 for connection requirements.
3.1.7
Auto-Series Operation
In the auto-series mode of operation, a master/slave configuration is established. With two
more supplies connected in series, one is established as master and the remaining supply
as the slave. The master supply must always be the most positive unit. When operating in
the auto-series mode, voltage control potentiometer settings determine the percentage of
total load voltage contribution by the slave unit. Current control potentiometer of the slave
unit is active and should be set to maximum clockwise position. See Figure 3-11 for
connection requirements.
3.1.8
Auto-Tracking Operation
In the auto-tracking mode of operation, a master/slave configuration is established. In this
configuration, two or more supplies may be connected with common negative outputs. The
slave(s) output voltage is a percentage of the master as controlled by the value of Rx.
