• RK series
  • RK series

RK series

Compact and High Power Programmable DC Power Supply

  • Max Voltage: 6V to 800V
  • Max Current: 0.6A to 1800A
  • Max Power: 385W to 1200W
  • Multiple functions
  • CE marking
    (For some models with option)

A 2.76-inch (70 mm) wide, this 400 W compact size

Low noise, multiple functions, and digital communication are highlights of supply which can be used from R&D to a variety of applications. All this convenience in a small DC power supply.

RK series is a small, programmable desktop 400 W, 800 W, 1200 W high output power supply. Our low noise switching method include several features such as a delay trigger, memory function, and a lock to prevent operator mistake. All this enables the user to operate the supply for a wide range of applications. Moreover, the sequence function enables the user to control the supply without a laptop.

The digital interface is also standard, with LAN, USB, RS-232C, RS-485, or GPIB control, allowing the operator to use the system in many different production environments.*

Only for some models with option are applied to CE.

  • * Adaptors or options will be needed additionally.

Features and Benefits

  • Compact and high power 400 W, 800 W, 1200 W
  • Ideal for research and development with low noise switching method.
  • PFC circuit and universal input would not select the place of operation.
  • Various operations by connecting multiple power supplies, such as master/slave, is possible.
  • Sink-current/Disable sink-current function contribute to high speed response, and also good for applications which need constant voltage.
  • Operability and safety are improved with new features of key-lock function and acceleration rotary encoder, which accelerate the output ramp up with the speed of rotating the encoder.

Sink Current/Sink Current Prevention Function

RK series featured function to sink current, and enable to decrease the voltage quickly when turning off the output or when control the voltage down, which increase the safety of operation. In case that continuous aging test in short interval, quick voltage fall time increase the efficiency of process. On the contrary by using sink current prevention function, it is possible to prevent voltage drop on the load by decreasing the current flow from load to power supply when turning off the power supply or when decrease the output voltage.

Note: It is not possible to stabilize the output by controlling back current. In case of load which has inverse voltage or over rated voltage, such as inductive load or regenerative motor, protect the power supply by adding dummy resister or diode to prevent back current.

Sink Current/Sink Current Prevention Function

Multi Setting Function

Function to memorize three different voltage and current settings in addition to standard preset function. No need to adjust the output when different setting, and convenient function for production inspection process or testing which require frequent data taking.

Multi Setting Function Multi Setting Function

Two Mode Lock Function

Function to select two different lock functions for two different purpose. "Full Lock" locks all the functions on front panel, and "Normal Lock" locks all the functions except for ON/OFF. "Full Lock" mode shall be good in case mis-operation have to be completely avoided, and "Normal Lock" mode shall be good in case to avoid mis-operation but secure the way for emergency stop of power supply. You can select the best mode according to your level of "Security".

(Each modes, emergency stop is possible with Power Switch.)

Full LOCK

Lock all the function other than reset lock mode, and effective for purpose to avoid mis-operation when controlled

Two Mode Lock Function
Normal LOCK

Lock voltage and current setting dial, and effective for purpose to avoid changing output setting by mistake or when easy emergency stop is required.

Normal LOCK

Delay Trigger Function

Delay Trigger Function

* t1 to t 8 can be set in the range 0.0 s to 99.9 s.

This function enables power supply to set to delay the output trigger timing. Either in case of single unit of RK series power supply or in case of multiple power supplies in Master/Slave connection *1, it is possible to use this feature among multiple DC power supplies *2 having individually different output voltage/current setting *3

  1. Can be connected up to 16 pcs.
  2. R4K-36 series, R4K-80 series, RK-80 series, RKT series, TB series and REK series. Detail catalog for each model is available. Please contact nearby sales office.
  3. Only for slave-local. In case of slave remote control, exact same model of power supply need to be used. Also, in case of slave-local, each output voltage and current can be set individually. In case of slave-remote, output voltage and current can be set with one-control function which each slave unit follows the master unit setting.

Dual Tracking, Multiple Outputs

Dual tracking control, which enables both positive and negative outputs simultaneously in master slave operation, is possible. Multi outputs and various versatile operations are also possible by combining above dualtracking control and slave local mode. Positive and negative output (+V, -V) of dual tracking control and set output voltage of slave local mode can be output simultaneously by turning on the master unit.
go to Operations

Dual Tracking
Dual Tracking
Multiple Outputs
Multiple Outputs

Models

CE mark: They are the models which can correspond to CE marking with -LCe option.

Model Output Ripple [rms] Safety standerds
Voltage [V] Current [A] Power [W] [mV] [mA] *1
RK6-65 0 to 6 0 to 65 390 8 130
RK6-130 0 to 130 780 8 260
RK6-180 0 to 180 1080 15 360
RK10-40 0 to 10 0 to 40 400 10 80
RK10-80 0 to 80 800 10 160
RK10-120 0 to 120 1200 15 240
RK15-26 0 to 15 0 to 26 390 10 60
RK15-54 0 to 54 810 10 110
RK15-80 0 to 80 1200 15 160
RK20-20 0 to 20 0 to 20 400 8 32
RK20-40 0 to 40 800 8 70
RK20-60 0 to 60 1200 15 96
RK30-13 0 to 30 0 to 13 390 4 10
RK30-27 0 to 27 810 6 25 CE mark
RK30-40 0 to 40 1200 15 30
RK36-11 0 to 36 0 to 11 396 4 10
RK36-22 0 to 22 792 6 20 CE mark
RK36-33 0 to 33 1188 15 30
RK45-9 0 to 45 0 to 9 405 4 8
RK45-18 0 to 18 810 8 15 CE mark
RK45-27 0 to 27 1215 18 20
RK60-6.6 0 to 60 0 to 6.6 396 10 15
RK60-13.5 0 to 13.5 810 12 25 CE mark
RK60-20 0 to 20 1200 18 20
RK80-5 0 to 80 0 to 5 400 10 8
RK80-10 0 to 10 800 15 10
RK80-15 0 to 15 1200 30 20
RK120-3.3 0 to 120 0 to 3.3 396 15 6
RK120-6.6 0 to 6.6 792 20 5
RK120-10 0 to 10 1200 20 8
RK160-2.5 0 to 160 0 to 2.5 400 20 4
RK160-5 0 to 5 800 30 10
RK160-7.5 0 to 7.5 1200 30 20
RK250-1.6 0 to 250 0 to 1.6 400 25 3
RK250-3.2 0 to 3.2 800 38 5
RK250-4.8 0 to 4.8 1200 27 5
RK350-1.1 0 to 350 *2 0~1.1 385 24 2
RK350-1.5 0 to 1.5 525 35 5
RK350-2.2 0 to 2.2 770 40 5
RK350-3.2 0 to 3.2 1120 48 5
RK400-2 0 to 400 *2 0 to 2 800 40 5
RK500-0.8 0 to 500 *2 0 to 0.8 400 20 3
RK500-0.9 0 to 0.9 450 20 5
RK500-1.6 0 to 1.6 800 30 5
RK500-2.4 0 to 2.4 1200 40 10
RK650-0.6 0 to 650 *2 0 to 0.6 390 22 5
RK650-0.8 0 to 0.8 520 30 4
RK650-1.2 0 to 1.2 780 80 4
RK650-1.8 0 to 1.8 1170 100 5
RK800-1 0 to 800 *2 0 to 1 800 100 5
  1. At 10% to 100% of rated output voltage and rated output current.
  2. Models of 350 V and more have no output monitor terminals on front panel. Contact us when you need them.

Functions

New useful functions

In addition to standard functions, these features offer many different usage and use in wide variety of applications.

Pulse/Ramp sequence, Master follow function (-LDe option)

above output control, between A to D is available.

A. Pulse Sequence

Using the stored voltage and current setting in each memory of a, b and c and multi set function, sequence operation is possible. The setting of repetition to say nothing of a continuous driving can be set. Various different operations, such as repetition of memory a and b or b ,c and off, are possible by setting the set time of memory a, b, c, and/or off to be 0.0. Thus, it makes this model suitable for evaluation test or other applications.

A. Pulse Sequence

ta,tb,tc and toff can be set with range 1.0 s to 99.9 h respectively.

B. Ramp

This function controls the ramping up and down the voltage and current to the set value (or from set voltage and current value to 0V/0A). It is convenient to increase (decrease) the voltage and current value slowly.

Note: The Ramp sequence can be selected from [both set voltage and current], [only set voltage], and [only set current].

B. Ramp

t1 and t2 can be set with range 0 to 999 s respectively.

C. Combination of Pulse and Ramp Sequence

Features of pulse sequence operation and ramp sequence operation can be combined for more convenient operation. In addition, by adding multi set function, sequence operation can be operated using stored voltage and current settings in each memory. The setting of repetition to say nothing of a continuous driving can be set. For example it is possible to slowly ramp up and down the voltage and current to the three different settings, and so, it is useful on various scenes.

C. Combination of Pulse and Ramp Sequence

t1, t2, t3 and t4 can be set with range 0 to 999 s respectively.
ta, tb, tc and toff can be set with range 0.0 s,1.0 s to 99.9 h respectively.

D. Master follow

When the pulse sequence operation and the ramp work master-slave, the output signal to the slave unit is transmitted. The slave unit can be output in an output status different from the master unit.

D. Master follow

Note: The operation accuracy of the timer when sequensing is 0.5%. Be careful when you use it by the long-term running operation.

Standard functions

Remote switch ON/OFF

Remote switch ON/OFF
Output Relay Open collector
ON SHORT VCE ≤ 0.4 V
OFF OPEN VCE ≥ 2 V
  • Sink Current 1 mA
  • Logic of output can be reversed.

Master/Slave Control

Master unit can control multiple units connected as slave.

Refer to related information below.

It has to hook with each same model in the same series in master-slave.
Master-slave function can only be effective with standard digital interface.

Master/Slave Control

Digital interface

Able to one control master-slave operation in addition to digital control by USB/LAN/RS-232C/RS-485/GPIB

-LGob option will be needed if it will be used under noisy condition. go to -LGob

Digital interface
(A) CO-M Cable
A two-meter cable is provided in each model. If you need a longer cable , please consult with our sales staff.

Remote Control

Remote/Local change
Remote/Local change
Mode External relay TTL
Remote Short Low
Local Open High

Each mode of voltage, current, OVP, OCP can be switched by relay or TTL signal.

Output control
Output control CV,CC
Vout, Iout Control Voltage R *
0 to Max
  • 0 to approx. 10 Vdc
  • Input imp. 500 kΩ
 0 to approx. 10 kΩ

* Possible to change 10 kW to 0 W for fail safe

Output control OVP, OCP
Vout, Iout Control Voltage
Max
x5 to 110%
  • 0 to approx. 10 Vdc
  • Input imp. 20 kΩ
Output Monitor
Output Monitor
Output
0 to Max		 0 to approx. 10 Vdc
Output imp. 1 kΩ		 0 to approx. 10 Vdc
Output imp. 1 kΩ
Status Output
Status Output
  • OUTPUT: ON at OUTPUT status
  • FLT: ON when fault *
  • CV, CC: ON at CV or CC status

* On when OVP, OCP, OTP, ACF, reverse connection of sensing or interlock(LD) status.

Common is floating in open collector output of common. Withstand voltage 30 Vdc, sink current 5 mA or less.

Please have the remote connector (TB1) isolated in order to prevent the damages to power supply in case it is connected to an electrical load which gives out high energy pulse output.

Various Digital Control Functions
Control function
  • Output ON/OFF setting
  • Status output
    (fault/output/OVP/OCP/ACF/reversible sense connection/interlock)
  • Maximum 16 units(-LGob option models: 32 units) digital control
  • One control function for multiple units
Write function Output voltage setting/Output current setting
  • Percent mode (100.00%)
  • voltage current value mode* (maximum rated voltage and current value)
OVP setting/OCP setting
  • Percent mode (100.00%)
  • voltage current value mode (maximum over voltage/over current protection value)
Reading function Output voltage reading/Output current reading
  • Percent mode (100.00%)
  • voltage current value mode* (maximum rated voltage and current value)
Output voltage setting/Output current setting
  • Percent mode (100.00%)
  • voltage current value mode* (maximum rated voltage and current value)
OVP setting/OCP setting
  • Percent mode (100.00%)
  • voltage current value mode (maximum over voltage/over current protection value)

* Minimum value of each model is same as minimum display of front panel meter.

Appearance

Front panel
  1. Output current, OCP setting display
  2. Output voltage, OVP setting display
  3. Constant voltage mode
  4. Output voltage, OVP setting dial
  5. Constant current mode
  6. Output current, OCP setting dial
  7. Output preset switch
  8. OVP/OCP setting switch
  9. Keylock setting switch
  10. Power ON/OFF switch
    (This has priority over all operations for safety reason.)
  11. Monitor terminal (20 Amax, M6)
    (Only for lower models than 250 V.)
  12. Remote programming display
    (Light on when voltage/current remote control.)
  13. OUTPUT (Light on when output is ON.)
  14. Output ON/OFF switch (To be used to turn output on/off when local mode as well resetting protection functions.)
  15. Airt intake
  16. Exhaust hole
  17. Digital interface (Master Slave connect on)
  18. Connector for remote control (TB1)
  19. Not Sink Current switch
  20. Earth terminal
Rear panel

Specifications

For details, download the datasheet below.

Options

NEW -LCk: CC-Link Interface Board *1

CC-Link master unit such as PLC can control power supplies with CC-Link compatible with CC-Link ver1.10, possible to operate as CC-Link device station. One unit occupies 2 stations, maximum 32 unit can be controllable. Please refer to CC-Link association web for CC-Link detail.

Multiple units can be simultaneously controllable by direct, Hub, or daisy chain connection.

-LGob: Optical Interface Board *2 *3

  • -LGob: Optical Interface Board + 2 meters long optical cable
  • -LGob(Fc5): Optical Interface Board + 5 meters long optical cable
  • -LGob(Fc10): Optical Interface Board + 10 meters long optical cable
  • -LGob(Fc20): Optical Interface Board + 20 meters long optical cable
  • -LGob(Fc40): Optical Interface Board + 40 meters long optical cable

It is isolated by optical communication. It makes it possible to prevent malfunction caused by transient phenomenon such as surge, lightning, induction, and external noise due to perfectly isolated by optical fiber. Total 32 units can be hooked with 1 adapter.

-LGob Optical Interface Board
(B) CO-opt Cable
As of models with -LGob option, a two-meter cable is provided in each model. If you need a longer cable, please consult with our sales staff.
  • In case power supply will be use following condition, make sure this options selected.
    • Noisy environment such as factories. (Sample: usage of motor and coil around load or power supply)
    • Usage on high voltage floating (more than 250 V)
    • In case the distance between power supply and controller (PC or PLC) is longer than 2-meter long.
  • If you use plural RK in optical communication, please use them according to either way below.
    • Connecting all RK which have optical I/F board serially.
    • Connecting all RK serially; the first RK is optical I/F board type, and all RK after the 2nd are standard I/F board type.

-LDe: Pulse/Ramp sequence, Master follow function

go to Pulse/Ramp sequence, Master follow function (-LDe option)

-L(SCPI): SCPI command

Enable control via SCPI command.

-LCe: Corresponding to CE marking *1

Object: Models with CE mark on Lineup.

-LUs1: USB Interface Board *2 *3

Enable digital control via USB

When controlling several RK power supplies via USB, a USB hub will be required between the PC and RK power supplies.

Corresponding OS: Microsoft Windows XP/Vista/7/8/8.1/10
All can correspond to both the 32-bit version and the 64-bit version.

(Microsoft and Windows are registered trademarks of Microsoft Corporation.)

-LEt: LAN Interface Board *1 *2 *3

Enable digital control via LAN

HUB shall be required between RK and personal computer when control multiple RK via LAN.

If this option is taken, CE certification becomes void.

-L(Mc0.5), -L(Mc0.15): Communication cable extension

The length of CO-M cable will be 0.5-meter long 0.15-meter long. (You can choose only either.)

-LZ: The handle for carrying *1

It can attach with all the models. (Height rises by 8 mm.)

If this option is taken, CE certification becomes void.

-LIc: Output current accumulation function *4

Accumulate the output current and display its value (up to 100 Ah). The accumulated value is stored even when output is off. Because, the accumulated value which stop the output can be set preliminarily, it is very suitable to the application such as controlling plating solution.

  1. Please ask to our sales office about the update status of the CE marking acquisition. -LCe option can not be selected with -LCk, -LMi, -LEt or -LZ option.
  2. These options cannot be selected together. Only one of each can be selected.
  3. Please see the CO series datasheet for detail of digital interface function.
  4. Please consider the location of usage. Environment humid and corrosive gas occurs typified by plating line can cause failure.

How to Order

When ordering, add Option No. to Model No.
Example:
RK30-27-LCeDeGob(Fc5)(SCPI)
RK650-1.8-LDe(Mc0.5)(SCPI)Z

Cable

AC Input Cables

When you use RK series in Europe, please contact our sales office.

CABLE TYPE 1

125 V/10 A

RK400W standard

  • CABLE TYPE 1
  • CABLE TYPE 1
CABLE TYPE 8

125 V/15 A

RK800W standard

  • CABLE TYPE 8
  • CABLE TYPE 8
CABLE TYPE 3

250 V/10 A

RK400W, RK800W

  • CABLE TYPE 3
  • CABLE TYPE 3
CABLE TYPE 4

250 V/10 A

RK400W, RK800W

  • CABLE TYPE 4
  • CABLE TYPE 4
CABLE TYPE 5

250 V/25 A

RK1200W standard

  • CABLE TYPE 5
  • CABLE TYPE 5

Please use the AC cable suitable for use environment and the area. CABLE TYPE3 and 4 correspond to CE marking.

Operations

Operation example

With RK series of the same model, output voltage and current can be increased by connecting power supplies in series or parallel.
Control must be set on each individual unit. Do not connect together COMMON of 2 units or more as the COMMON of connector for external input and output control (TB1) is connected with output.

Series operation

Series operation

Sum of output is up to 250 V.
It is impossible to series operation for one exceeds 250 V in output volt.
Output current is of the min, one of power supply among them.

Parallel operation

Parallel operation

Make all setting voltage same value. Output current is sum of each current. In addition, make OVP level for all power supplies maximum to prevent damage.

Split operation

Split operation

Possible to output on positive (+) or negative (-)

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