102 PWR-01
Master-Slave Parallel Operation
Master-slave parallel operation is a function used to control a whole parallel-connected sys-
tem from a master unit. One unit is the master unit, and other PWR-01s connected in parallel
are slave units. The master and slave units must all be the same model.
You can use master-slave parallel operation to increase the output current (maximum output
current: the rated output current of one unit × the number of units connected in parallel).
The difference in the output voltage and output current between the master unit and the slave
units is within approximately 5 % of the rating.
Features
The functions of the PWR-01 during master-slave parallel operation are as follows:
Voltage display and current display
The voltmeter on the master unit displays the voltage. The master unit displays the last volt-
age that was set, and the voltmeter on the slave units displays “SLAV.”
The master unit’s ammeter displays the total of the currents of all the units connected in par-
allel. For slave units, the current display of each slave unit can be set (CF35: OFF/ ON).
The maximum current display is 999.9.
You can switch the display so that it shows power (p.34). The master unit’s ammeter displays
the total of the powers of all the units connected in parallel. For slave units, the power display
of each slave unit can be set (CF35: OFF/ ON).
If the number of units in parallel operation (CF44) set on the master unit does not match the
actual number of units connected in parallel, the correct current will not be displayed.
External control
This is only available on the master unit (p.83).
400W model 800W model 1200W model
Maximum number of
units connected in
parallel
Up to three units
including the master
unit
Up to three units
including the master
unit
Up to two units includ-
ing the master unit
When using a PWR-01 independently or when there are PWR-01s not using parallel opera-
tion, disconnect the parallel operation connections. Otherwise, the PWR-01 may not operate
properly.
Master unit Slave unit
Example of the panel display
during parallel operation
(Output current at 20 A, slave
unit display set to on)
CV
CC
/
W
V
A
AL M RMT LOCK LAN
BCA
PRESET
DLY SEQ HBSSVIR
CV
CC
/
W
V
A
AL M RMT LOCK LAN
SC2 SC3 LOCKALM CLR SC1
SHIFT
FINE
FINE
REGULA TED DC POWER SUPPLY
OUTPUT
VOLTAGE
CURRENT
CONFIG
PWR DSPLMEMORY
LOCALSET OVP•OCP
CV
CC
/
W
V
A
AL M RMT LOCK LAN
BCA
PRESET
DLY SEQ HBSSVIR
CV
CC
/
W
V
A
AL M RMT LOCK LAN
SC2 SC3 LOCKALM CLR SC1
SHIFT
FINE
FINE
REGULA TED DC POWER SUPPLY
OUTPUT
VOLTAGE
CURRENT
CONFIG
PWR DSPLMEMORY
LOCALSET OVP•OCP
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