RK-80 series is a high-performance programmable DC power supply. The 3-digit digital meter is added newly. Needless to say, the innovative compact size, variable range feature, and high operability are realized. RK-80 series is the suitable DC power supply for a variety of applications from laboratory experiments to line productions.
Features and Benefits
Compact and lightweight space-saving design
Very quiet due to the adopting naturally-cooled system without a cooling fan
Wide output range RK-80L: 16 V/10 A, RK-80: 36 V/5 A, RK-80M: 110 V/1.3 A, RK-80H: 320 V/0.5 A
Unique low noise power conversion technology for research application
Power factor correction and universal input
Multiple units operation with master/slave and digital interface (option)
New User-Friendly Feature
Useful new feature of variable range
Set voltage/current value within 80 W, then turn on output.
* Not automatic range change which can output 80 W all the time. Resetting is required.
Three New Useful Functions
Output voltage and output current can be set speedily.NEW
When setting output voltage and output current by the rotary encoder on the front panel, every time the fine switch is pressed, the setting digit on the digital display will be switched. In the case, of setting a small output value or changing the setting value widely, the setting can be done speedily. (Fine switch cannot be used when output value is set by remotely.)
When an output is OFF, the preset value can be displayed automatically by operating the rotary encoder on the front panel.
Various protections such as overvoltage/overcurrent protection (OVP, OCP) are equipped as standard.
The ripple applies from 10% to 100% of the rated output.
The value at local control. The unit setting will be changed by moving the decimal point as some carry occurs. (The decimal point of the voltage/current in RK-80L or of the voltage in RK-80M will be carried.)
Maximum output @115 Vac input
Functions
Three Position Preset Memory Function
Memorize three voltage and current settings in addition to the standard preset values. There is no need to adjust the output when different settings, and convenient function for the production inspection process or testing which requires frequent data taking.
Memory (a)Memory (b)Memory (c)
Delay Trigger Function
(Only one RK-80 is available when -LUs1 or -LRmf option is selected.)
When turning OUTPUT ON/OFF, you can start or stop the output operation with some delay. The function is available not only for a single power supply but also for multiple units of Matsusada Precision DC power supplies in the digital interface *1 which are individually set values of output voltage/current in addition to a single power supply. *2
R4K-36 series, R4K-80 series, RK series and REK series For details, contact our sales office. They can be connected to up to 16 units.
Only for slave-local In the case of slave remote control, exact same model of power supply needs to be used. Also, in the case of slave-local, each output voltage and current can be set individually. In the case of slave-remote, output voltage, and current can be set with a one-control function in which each slave unit follows the master unit setting.
* t1 and t8 can be set respectively in 0.0 s to 99.9 s
Two-level Lock Function
Two-level lock is selectable: "Full Lock" for locking all the switch operations and "Standard lock" for locking except for the output ON/OFF.
"Full lock" is used to prevent all erroneous operations, and "Standard lock" is for readily applying the emergency stop along with the misoperation prevention, which can ensure "safe" operation.
(Emergency stop by the power switch is available in both two lockings. )
Full LOCK
Locks all the switch operations except canceling the lock function.
It is especially suited to prevent misoperations in the remote control.
Standard LOCK
Locks the voltage/current setting switches.
It can prevent mistakenly changing the output setting in local control and immediately applying an emergency stop.
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.
Note:
Reverse current cannot be controlled and stabilized. Connect a dummy resistor or
reverse current prevention diode when a load of the reverse voltage is equal to or higher than the rated voltage (inductive loads, regenerative motors, etc.)
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 the above dual tracking control and slave local mode. Positive and negative voltage 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.
Master/slave is available for the models with -LGmb and -LGob options
Dual Tracking
Multiple Outputs
Remote Function
External output ON/OFF
Output
Relay
Open collector
ON
SHORT
VCE ≤ 0.4 V
OFF
OPEN
VCE ≥ 2 V
Sink current 1 mA
* +S is common. So external control voltage shall be input with +S as reference. Otherwise, it can cause failure.
Remote sensing
Compensate the voltage drop (V0-VL) due to resistance of output lead or drop of stability by contact resistance. (maximum 0.5 V)
Specifications
PANEL DESCRIPTION
Output voltage and OVP setting display
Output current and OCP setting display (RK-80H: mA display)
Remote programming display: ON: Remote controlling voltage/current
Output display:
Light up when output is on.
OUTPUT ON/OFF switch: Using OUTPUT ON/OFF and resetting the protection functions
FINE switch:
To shift the digit of a setting value of output voltage/current.
Monitor terminal
Constant voltage operation mode display
Constant current operation mode display
PRESET switch
OVP/OCP switch
LOCK switch
Output voltage and OVP setting dial
Output current and OCP setting dial
Power ON/OFF switch: This has priority over all operations for safety reasons.
LS switch (remote switch)
+Sense
Output terminal * As of RK-80H, the +/– in the middle of the terminal terminals are NC.
Digital interface
Enable digit control via LAN/USB/RS-232C/RS-485/GPIB as well as one control with Master/Slave.
When noisy environment is presumed, -LGob option (optical interface) is required.
Master/slave *3
-LGmb: Digital interface + modular cable 2 meters length
-LGmb (Mc0.15): Digital interface + modular cable 0.15 meters length
-LGmb (Mc0.5): Digital interface + modular cable 0.5 meters length
Adapters (sold separately)
To use the digital interface, you need to prepare a digital interface adapter separately.
The following interface adapters are available according to the communication method of your controller port.
Adapter for LAN: CO-E32m
Total 16 units can be connected to one CO-E32m. LAN cable is not provided.
Adapter for USB: CO-U32m
Total 16 units can be connected to one CO-U32m. USB cable is not provided.
Adapter for RS-232C (9-pin): CO-MET2-9
Adapter for RS-232C (25-pin): CO-MET2-25
Adapter for RS-485 (25-pin): CO-MET4-25
[Dsub⇔Modular jack] Total 16 units can be connected.
Adapter for GPIB: CO-G32m (Discontinued in December 2028)
Total 16 units can be connected to one CO-G32m. GPIB cable is not provided.
(A) CO-M cable
A two-meter cable is provided in each unit without an interface option.
If you need a longer cable, please consult with our sales staff.
-LGob *1 *2
Optical interface
With optical communication, isolation control is performed. As complete isolation is performed by means of optical fiber, this enables advanced prevention of erroneous operations involved with transient phenomenon caused by surges, inductive lightning, external noise, etc.
Select the optional optical interface board (-LGob) when using this DC power supply under the following conditions.
Noisy environment including factories (Example: Motors or coils are used near power supplies and loads).
Using with high voltage floating (more than 250 V)
Installation distance of 2 meters or more between the DC power supply and a controller such as a computer, laptop, or Programmable Logic Controller (PLC).
Adapters (sold separately)
To use the optical interface, you need to prepare an optical interface adapter separately. The following interface adapters are available according to the communication method of your controller port.
Adapter for LAN: CO-E32
Total of 32 units can be connected to one CO-E32. LAN cable is not provided.
Adapter for USB: USB-OPT
Total of 32 units can be connected to one USB-OPT. USB cable is not provided.
Adapter for RS-232C (9-pin): CO-OPT2-9
Adapter for RS-232C (25-pin): CO-OPT2-25
Adapter for RS-485 (25-pin): CO-OPT4-25
[Dsub⇔Modular jack] Total 32 units can be connected.
Adapter for GPIB: CO-G32 (Discontinued in December 2028)
Total of 32 units can be connected to one CO-G32. GPIB cable is not provided.
Delay trigger function can be set individually at the time of master-slave.
Furthermore, all functions (except for OUTPUT) of master-slave can be also canceled by the change of Remote/Local, and the preset value of output voltage/current can be set individually.
+S is common. So external control voltage shall be input with +S as reference. Otherwise, it can cause failure.
The master/slave function is not provided.
How to Order
When ordering, add Option No. to Model No. in alphabetical order followed by the input voltage. Example: RK-80-LGmb (Mc0.5) ,RK-80L-LGob (Fc20)
Accessory
AC INPUT CABLE
Standard
CABLE TYPE1
125 V / 10 A
2.5 meters
Fixed length
Sold separately
CABLE TYPE3
250 V / 10 A
2.5 meters
Fixed length
Sold separately
CABLE TYPE4
250 V / 10 A
2.5 meters
Fixed length
ACCESSORY KIT
Available for convenient use of the unit.
Stand
For one unit operation...
Binder
For the applications which require two to six units combination. Dual, triple, and quad-multiple operations are possible.
* Cooling fan is needed for more than three units combination
Rack mount shelf [RMO series]
[RMO-133H-RK, RMO-133H-RK2,RMO-133H-RK3]
10 Units/one rack shelf, and can be placed in a 19” rack cabinet. Easy to take one unit out.
Best suitable for a system operation.
With fan unit.
* Power supply is not included in the accessories.
RK-80 power supply of the same model number can be connected in series or parallel to increase the output voltage or current.
In that case, local control or the control in the digital master/slave is recommended. Because the common of the outside input/output control connector (TB1) is connected to the positive voltage output, do not connect common more than two.
Series operation
Total output voltage is to be up to 250 V. Therefore for models with output voltage of over 250 V, series operation cannot be conducted. Output current is to be the smallest current of those.
Parallel operation
Please keep all the settings of voltage the same. Output current will be the summation of each current. Please keep the OVP level of the power supply maximum to prevent any damage.
Split operation
+output and –output are available.
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RK-80 series Datasheet
Date: 2024-02-01 rev.13 PDF (2,125 KB)
How to Use DC Power Supplies
Date: 2024-03-05 rev. 08 PDF (1,467 KB)
RK-80 series Basic Instruction Manual
Date: 2020-09-15 rev0.0 PDF (396 KB)
RK-80 series Instruction Manual
PDF(950KB)
RK-80 series USB Driver
Date: 2023-08-23 rev1.7.5 ZIP (6,617 KB)
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* t1 and t8 can be set respectively in 0.0 s to 99.9 s
