6-3 Parallel operation (master-slave control)
*Two or more units of the same machine can be hooked up in parallel to give
an increase in output current. The total output current w i l l be the sum
of the output currents of the individual machines.
* In p a r a l l e l operation, one machine wi11 act as the masster and a l l others
wi 11 act as slaves. The output voltages and output currents are a l l set
from the master machine.
*When hooking the machines up in p a r a l l e i , be sure that a l l the power ON/
OFF switches are OFF.
HOOK-UP PROCEDURE;
DTurn the power switches of the master unit and slave unit(s) a l l to "OFF"
2) Turn the MASTRE/SLAVE switch (located on the back panel) on a l l the slave
units from "MASTRE" to "SLAVE".
3) Hook up the p a r a l l e l operation-use terminals (IN/OUT, located on the rear
panel) of the master and slave(s) as shown in Figure 5.
4) For connecting the output terminals of each of the machines to the load, use
a l l cords of the same length.
5) For ( + ) and ( - ) grounding to the GND terminal, hook up the master and
slave machines v i a the terminals on the panels.
Figure 7 shows the output connection scheme for ( - ) grounding.
6) Set the voltage and current knobs of a l l the slave u n i t ( s ) to the maximum
setting.
7) Turn the power switches of the master unit and slave unit(s) a l l to "ON".
Control the output voltage and current as desired v i a the voltage and
current knobs on the master unit.
*When the output goes to 0 amperes in the p a r a l l e l operation mode, output
voltage can no longer be control led by the master machine. Be sure to
keep a current flowing that i s several % of the rated current.
Hook-up of rear panel terminals in the parallei operation mode
12
Figure 5.
Master
Slave 1
Slave 2
