Kikusui PLZ-3WH Series, Operation Manual

Page: 97 / 172

Chapter 4: Operating Procedure
4-57
4.7 Parallel Operation
When multiple identical load units are connected and operated in parallel, the current and power capacities can be
increased. In parallel operation, one master unit controls multiple slave units. Since the master unit is connected to the
slave units with flat cable control lines equipped with a MIL-compliant connector, the system can easily be expanded.
CAUTION
• To run PLZ153WH and PLZ303WH load units in parallel, be sure to use the load terminal on
the rear panel.
• Operation in series is not possible.
J1
− ＋
J1
J2
−
＋
J2
− ＋
※
2
※
1
P.S
＋
−
※ 1 ： Power cable
※ 2 ： Control flat cable
Master load unit
Slave unit 1
Slave unit n
Fig. 4.7-1
● ●
● ● ●
Setup procedure
(1) Turn off [POWER] switches of all the connected load units.
(2) Be sure to connect the load terminals [DC INPUT] of the master and slave units (see the figure above).
(3) Connect J1 of the master unit to J2 of the slave unit 1 using a flat cable. Connect J1 of the slave unit 1 to J2 of the
slave unit 2 using a flat cable. Connect J1 of the slave unit 2 to J2 of the slave unit 3 using a flat cable. Repeat the
connections until all the load units are connected to each other.
(4) Set the dip switch [SW1-1] on the rear panel of each slave unit to the “ON” position.
(5) Call the Configuration Menu using [SHIFT] + [R SET] (CONFIG) keys on the master unit operation panel, and select
the menu item, “14: Parallel Ope.” This sets all the load units to be operated in parallel, including the master unit.
(6) Press the [ESC] key to return the display to its pre-setup status.
(7) Although the set ranges for the current, power, and resistance are all increased on the master unit, the pre-setup
values still appear on the display.
Turn on all the [POWER] switches simultaneously, or turn on the [POWER] switch(es) of the slave unit(s) first. An
alarm “*ALARM EXT” may appear on the display.
Note that if J1 and J2 are connected incorrectly, the load units may be damaged. Up to five load units can be operated
in parallel as long as they are all of identical type. If you want to operate more than five load units in parallel, contact
your Kikusi agent.