• PRKT series | DC power supply Rackmount | Matsusada Precision
  • PRKT series | DC power supply Rackmount | Matsusada Precision

PRKT series

Programmable Turbo DC Power Supply

  • Max voltage: 80V to 900V
  • Max current: 16.7A to 170A
  • Max power: 5kW
  • Monitoring controlling web server

Constant Power Output for 3 Times Multi-range (V&I) Operation

PRKT series is DC power supply equipped with a turbo function, enabling a wide range of voltage/current three times higher than previous DC power supplies with approximately the same rated output power.

The PRKT series all allows flexible voltage and current output within its rated power, resulting user not to require to search for power supply with unnecessary wider rated voltage and current. Thus single PRKT unit can be used for much wider user application.

Not only its a wide range of output, but the general performance of the power supply is pursued to achieve overwhelming quality, providing power factor correction circuit with 0.99 power factor, color display panel having excellent visibility, and adoption of speedy and excellent precision rotary encoder.


Device evaluation
Devices with different rated value
Evaluation and charging of rechargeable batteries
Evaluation testing and charging of batteries and capacitors, etc.
Evaluation testing of communications equipment
Various testing of Sever and Rooter
Evaluation of power conditioners
Simulation of photovoltaic cells and fuel cells


  • Equipped with a turbo function to achieve a wide range of output
  • CV/CC priority setting function enables suppression of overshoot by setting the voltage/current rise sequence when output is turned ON
  • Variable internal resistance function enables simple simulation of rechargeable batteries, photovoltaic cells, fuel cells, etc.
  • The sink current suppression is used to reduce the reverse current flowing from the load to the unit in order to prevent a voltage drop on the load as the output is OFF or the set voltage is lowered.
  • Ideal for research & development with its low-noise switching method


Model Maximum output
Voltage [V] Current [A] Power [kW]
PRKT80V170A5kW 80 170 5
PRKT300V50A5kW 300 50 5
PRKT500V30A5kW 500 30 5
PRKT900V16.7A5kW 900 16.7 5


Output Range Graphs

With the turbo function, wide range of voltage and current output compared to conventional DC power supplies.


When output voltage is 80V, ouput current is 62.5A.


When output voltage is 300V, ouput current is 16.7A.


When output voltage is 500V, ouput current is 10A.


When output voltage is 900V, ouput current is 5.6A.

Supports Expansion with MASTER/SLAVE Control

Wide range output with parallel connections up to 4 units.

Connection Diagram

The example to connect to one MASTER and three SLAVE units
A legend of MASTER/SLAVE connection image

* Dedicated cable for master-slave connection is available. We offer the set of a parallel control cable and a cable with attached shared terminal. refer to "Master/Slave control cable" in the datasheet below.

  • Expandable to a total of four MASTER and SLAVE units.
  • During MASTER/SLAVE connections, values of output voltage/current for the overall unit are displayed on the output voltage/current meter of the MASTER. (Individual output values are not displayed on the output voltage/current meter of each SLAVE.)

Note: Make sure to use the same length of all the cables to connect to each load from the main unit.

Preset Memory Function

With the preset memory function, the preset values are automatically saved when turning power off. Furthermore, up to three different voltage, current, and power settings are also memorized respectively.

Sequence Function

In terms of programmable sequence functions of step time, step amplitude, ramp, CV/CC mode, sequence end setting, step jump, and jump count, the sequence control makes such parameter operations much easier with the attached software.

As this option enables to generate optional waveforms, you can use a great variety of applications including testing, evaluation, and verification.

Program image
Sequence Function
  • Step setting time 0.0 s to 3,600.0 s
  • For one program, a maximum of up to 1,024 steps can be configured and stored.
  • CV/CC mode can be set for each program.
  • Repetition frequency: infinity, 1 to 999

CV/CC Priority Setting Function

CV (constant voltage) priority/CC (constant current) priority modes can be selected and set. As is the case with diodes, a load tends to suddenly change the resistance at certain points. When the device is started in CV mode, the current will be momentary overshot.

Using the PRKT series, the occurrence of overshoot can be suppressed by selecting CC priority mode. The function can reduce the risk of damaging expensive loads such as high-power laser diodes.

CV priority mode

CV priority mode

CC priority mode

Always starts in CC

* Overshoot is less likely to occur as the CC value is set to the lowest in the range where the CC state can keep not by releasing the voltage setting even in the CC priority mode.

Sequence Setting Input/Output and Operation Log Output via Front USB Terminal

By inserting USB memory into the front panel USB port, you can readily perform not only reading the sequence settings arbitrarily created but also collecting operating logs.

Software Image
the attached software image

The attached software can read the log file output of the main unit.

The following action logs can be displayed.
  • Elapsed time
  • CC/CV mode
  • Output value (voltage, current, power)
  • Status
  • Error

Two-mode Lock Function

The locking is selectable from two setting modes: one is "Full LOCK" to lock all front panel operation, and the other is "Normal LOCK" to lock everything except ON/OFF switch.

The function is so user-friendly that the "Full LOCK" mode is provided to ensure the prevention of erroneous operation, and the "Normal LOCK" function facilitates the emergency stop while preventing erroneous operation.

Emergency stop operation using the POWER ON or OFF switch is possible in either mode.


All switches except for LOCK release, the touch panel, and encoder are locked. It is further effective to prevent the erroneous stop during the remote control and to completely avoid erroneous operation.

Full LOCK function

Normal LOCK

Switches other than ON/OFF, the touch panel, and encoder are locked. It is further effective to prevent the erroneous changes of output values during the local control and to facilitate emergency stops.

Normal LOCK function

Internal Resistance Variation Function (during CV mode)

A value set to the causes a voltage drop when the load current flows. Batteries, photovoltaic cells, and fuel cells can be simulated. (The setting range of the internal resistance value is from 0 Ω to the rated voltage/rated current.)

a graph of internal resistance

Sink Current Suppression

When supplying power to loads with capacities like batteries and capacitors, the sink current suppression is used to reduce the reverse current flowing from the load to the unit in order to prevent a voltage drop on the load as the output is OFF or the set voltage is lowered.

Sink Current

Note: Reverse current cannot be controlled and stabilized. Connect a dummy resistor or reverse current prevention diode when load of the reverse voltage is equal to or higher than the rated voltage (inductive loads, regenerative motors, etc.).

Status output

status output

The status output is provided by open collector. It has a floating common terminal which is used for each status output.

  • Withstand voltage: 30 Vdc
  • Sink current: 5 mA


For details, download the datasheet below.


For details, download the datasheet below.


-LCa: CAN interface board*

Using CAN communications, output controlling and operation status monitoring of these devices can be performed.

-LGob: Optical interface board*

  • -LGob: Optical interface board + 2 m optical cable
  • -LGob(Fc5): Optical interface board + 5 m optical cable
  • -LGob(Fc10): Optical interface board + 10 m optical cable
  • -LGob(Fc20): Optical interface board + 20 m optical cable
  • -LGob(Fc40): Optical interface board + 40 m optical cable

With optical communication, the unit is remotely controlled while it is isolated. As complete isolation is performed by means of optical fiber, this enables advance prevention of erroneous operation involved with transient phenomenon caused by surges, inductive lightning, external noise, etc.

The optical communication adapter at the control side should be purchased separately.
  • for LAN: CO-E32
  • for USB: USB-OPT
  • for RS-232C: CO-OPT2-25, CO-OPT2-9
  • for RS-485: CO-OPT4-25
  • for GPIB: CO-G32

-LRs: RS-232C/485 interface board*

Using RS-232C/485 communications, output controlling and operation status monitoring of these devices can be performed.

Furthermore, Modbus communications are available via RC-232C/485. Contact our sales representative for details.

* Selecting each individual option simultaneously in -LCa, -LGob, and -LRs is not allowed.

How to Order

When ordering, add Option No. in the following order by alphabet, and number to Model No.
  • PRKT80V170A5kW-LGob(Fc5)
  • PRKT500V30A5kW-LRs

AC input cable

Model Name: CABLE TYPE 18, CABLE TYPE 19

Cable length: 2.5 m

(Contact our sales representative for details when you would like to extend the cable length.)

* Install a breaker between the AC main power supply and the device when required by the local electrical code.
If the PRKT series is used in Europe, please be sure to contact our sales representatives beforehand.

Master/slave control cable

This is a cable with a cable with shared terminal attached (refer to right picture) and a parallel control cable (refer to P. 04) set. The length of each cable from the terminal to the terminal is approximately 1.5 meters. Therefore, when connecting two PRKT, the length is about 1.5 meters, and when connecting three PRKT, the length is about three meters.
When placing an order, please put a number from two to four in □.
For example, if two PRKT are to be connected as master/slave, two will be entered, and if four PRKT are to be connected as master/slave, four will be entered.


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