DPU Series

Digital Thyristor Power Controllers

The DPU series digital power controllers offer optimal and stable power control with minimal noise interference. The units also feature various control methods and functions including soft start, soft up/down, and alarm.

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Description

Features

  • High speed and high accuracy by digital control using high speed CPU
  • Various controls
    – Phase control, feedback control (constant voltage/constant current/constant power)
    – Zero crossing cycle control (fixed/variable cycles)
    – Zero crossing ON/OFF control
  • Improved maintainability with built-in fast-acting fuse and easy fuse replacement
  • Communication output model: RS485 (Modbus RTU)
  • Various control inputs and DI inputs
    – control input: analog (current, voltage), ON/OFF (voltage pulse, no voltage), communication (RS485), potentiometer
    – DI input: AUTO/MAN switching, RUN/STOP switching, Reset, output holding, SP designation (6 setting points can be customized)
  • Various alarm output
    – Overcurrent, overvoltage, fuse break, heat sink overheat, device fault, heater break(partial heater break detection), phase loss alarm
  • Improved convenience by separating operation part
  • Applicable load
    – Supercantal, platinum, molybdenum, carbon, halogen lamps, chrome, nickel, etc.
Feedback Control
Various Input
Output Accuracy
RS485 Communication (Modbus RTU)
Dedicated Software

Details

Convenient Installation with Remote Display

Users can remotely monitor and control the units by installing the remote display unit in separate control panels.

5.6-Inch color LCD Touch screen

Various Control Methods

Zero cross ON/OFF control, standard control, feedback control, and zero cross cycle control (fixed/variable cycle) are available for stable load control.

  • Constant Voltage Feedback Control Mode

    Maintains constant output voltage relative to the control input when there is a change in power supply or load resistance of loads with low temperature coefficient of electrical resistance (iron, chrome, nichrome, etc.)

     

  • Constant Current Feedback Control Mode

    Maintains constant output current relative to the control input when there is a change in power supply or load resistance of loads with high changes (6 to 12 times normal temperature) in temperature coefficient of electrical resistance (platinum, molybdenum, tungsten, etc.)

 

  • Constant Current Power Control Mode

    Maintains constant power supply relative to the control input when there is a change in power supply or load resistance. Ideal for large heaters with high changes in resistance due to overheating such as silicon carbide (SiC).

 

Zero Cross Cycle Control (Fixed Cycle)

The load power repeats ON/OFF control during a fixed cycle (60 cycles) in relation to the control input signal.

Zero Cross Cycle Control
Example: Fixed cycle (60 cycles) control – control output at 40%

Zero Cross Cycle Control (Variable Cycle)

Minimal number of cycles are used as AC sine wave repeats ON/OFF control in relation to the control input signal

Zero Cross Cycle Control

Various Functions Available

Various user friendly functions are available including soft start, slow up/slow down, input/output slope correction, multi-SP (setting point), full load auto recognition, and more.

SLOW UP / SLOW DOWN: Used to protect the load from inrush current during RUN mode.

 

Output High Limit/Low Limit: Used to protect the load by limiting output range.

 

Output Slope Setting: Used to set the output ratio between 0.00 and 1.00 in relation to contol input.

 

Multi-Setting Point: Set up to 6 setting points, and the output can be controlled in relation to 3 digital inputs.

 

Various Alarm Features

Various alarms are available for safe operation, including overcurrent alarm, overvoltage alarm, fuse disconnection alarm, heatsink overheat alarm, heater disconnection, Phase loss and more.

Various Alarm Features

Simple Fuse Replacement

Open type case allows users to easily replace fuse in the power controllers.

Simple Fuse Replacement

Applications

  • Reflow Ovens

    SPR3 series single-phase power controllers used in reflow ovens to accurately control temperature using feedback control.

  • Semiconductor and Display Heat Regulators

    Power controllers are used in semiconductor and display heat regulators which require precise temperature control.

Other Model