HP 6259B User Manual

or the load, the current controls of the slave supplies
should be set to maximum and the master supply's current
controls used to establish the output current or current
limit.
3-64 Overvoltage Protection in Auto-Series. The inter¬
connections shown in Figures 3-12 and 3-13 between the
external crowbar trigger terminals on the master and on the
slave(s) must be made to permit the overvoltage crowbar in
any one of the interconnected supplies to fire the SCRs in
all of them if an overvoltage condition occurs. Be sure to
connect them with correct polarity, plus to plus and minus
to minus. Set the overvoltage potentiometer in each supply
so that it trips at a point slightly above the voltage that
supply will contribute.
3-65 Auto-Series With Remote Sensing. To combine
auto-series operation with remote sensing, connect the
supplies as described above but remove the +S jumper
from the master supply and the -S jumper from the last
slave supply and connect the +S and -S terminals directly
to the (+} and (—) ends of the load. Observe the precautions
outlined under paragraph 3-27.
3-66 Auto-Series With Remote Programming. When
two or three supplies are connected in auto-series, their
combined output voltage, current, or both can also be
remotely programmed, Refer to the appropriate sections
of paragraph 3-34 for the additional rear panel connections
required and make these connections to the master supply
only. Observe all precautions outlined in the paragraphs on
EXT
CROWBAR
TRIGGER
Figure 3-1 2. Auto-Series Operation of Two Units
remote programming. The simultaneous use of remote
sensing and remote programming is also possible during
auto-series operation.
3-67 Auto-Tracking Operation
3-68 Figures 3-14 and 3-1 5 show the rear panel inter¬
connections required to operate two or three supplies in
the auto tracking mode. This mode of operation allows two
or three supplies that share a common negative output bus
to power separate loads and have their outputs simultaneous¬
ly programmed by the voltage and current controls of a
master supply. Unless their outputs are to be equal, the
supply that is to have the greatest output voltage must be
selected as the master. The output voltage of each slave
supply remains a constant percentage of the master's
with the percentage for each slave established by that
slave's voltage control settings and the choice of its
external programming resistor R^. Any of the supplies
included in this manual can be used as an auto-tracking
slave, and any well-regulated variable output supply can be
used as the master.
EXT
CROWBAR
TRIGGER
Figure 3-13. Auto-Series Operation of Three Units
3-10

HP 6259B Specifications

General

Brand	HP
Model	6259B
Category	Power Supply
Language	English