G3PX Control Methods

Analog Control

The change in current output of the Temperature Controller between 4 and 20 mA is used for precise heater control by the G3PX,which outputs smoothly adjusted power. Fine adjustments of the heater temperature are possible with external or internal duty setting.

ON/OFF Control

The voltage output of the Temperature Controller is used for ON/OFF heater control. Fine adjustments of the heater temperature are possible with external or internal duty setting.

Two-position Control

The high level and low level of the output are freely set with an external variable resistor, either of which is selectable with the relay output of the Temperature Controller.

Manual Control

Output adjustments are possible with an external variable resistor.

ON/OFF Control

Cycle Control

Optimum Cycle Control (High-accuracy zero-cross control)

Phase Control (Single-phase Model)

Phase Control

Output is varied at half-phase intervals. Therefore, highly accurate temperature control is possible.

The following is an example of a waveform in single-phase control.

Three-phase models use a three-arm phase control method.

The change in current output of the Temperature Controller between 4 and 20 mA is used for analog control of the output power of the G3PX.

This function suppresses heat shock and ensures fine control without being influenced by external disturbance. As a result, each heater can withstand long use.

Duty Setting

As shown in the following graphs, the change of output can be adjusted with an internal or external variable resistor.

In the case of an electric oven, overshooting may result by using a heater with a capacity that is excessively high for the size of the oven.

By adjusting the duty-setting variable resistor, the overshooting can be suppressed. For example, if a duty of 60% is set for a 5-kW heater, a maximum of 3 kW will be input into the heater. Thus, it operates as a 3-kW heater.

Duty Setting All G3PX Single-phase Models

All G3PX Three-phase Models

Soft-start

This function suppresses the inrush current that is caused when the load is turned ON, thus ensuring smooth starting of the load.

This function is especially effective for loads that involve high inrush current, such as halogen lamps.

The following is an example of a waveform in single-phase control.

Base-up

This function briefly keeps the output of the G3PX turned ON after heating when the input signal is OFF.

This is effective for a smooth start of equipment that is slow in initial heating operation.

Constant Current

If the load has an extremely high inrush current, the extended soft-start function cannot suppress the inrush current. The constant-current function suppresses the inrush current automatically, thus protecting the heater and system from damage.

Connection Examples of Single-phase G3PX and Temperature Controller

The soft-start time is adjusted between 0.5 and 10 s, thus enabling the heaters to withstand long use.

If a single Temperature Controller is in control of more than one heater, by making a proper duty setting, the difference in temperature between the heaters can be improved. (Connection Example 2)

Note: The temperature at point B can be higher than that at point A due to thermal interference. In that case, make the duty set value for heater B smaller than that for heater A so that there will be no difference in temperature between points A and B.

Connection Example 1.
Duty Change Using Voltage-output Temperature Controller and One G3PX


Connection Example 2.
Duty Change Using Voltage-output Temperature Controller and Multiple G3PXs


Connection Example 3.
Temperature Control Using Temperature Controller with Current Output of 4 to 20 mA and G3PX


Connection Example 4.
Duty Change Using Temperature Controller with Current Output of 4 to 20 mA and G3PX

Connection Examples of Three-phase G3PX and Temperature Controller

The soft-start time is adjusted between 0.5 and 10 s, thus enabling the heaters to withstand long use.

If a single Temperature Controller is in control of more than one heater, by making a proper duty setting, the difference in temperature between the heaters can be improved. (Connection Example 2)

Note: The temperature at point B can be higher than that at point A due to thermal interference. In that case, make the duty set value for heater B smaller than that for heater A so that there will be no difference in temperature between points A and B.

Connection Example 1.
Duty Change Using Voltage-output Temperature Controller and One G3PX


Connection Example 2.
Duty Change Using Voltage-output Temperature Controller and Multiple G3PXs


Connection Example 3.
Temperature Control Using Temperature Controller with Current Output of 4 to 20 mA and G3PX


Connection Example 4.
Duty Change Using Temperature Controller with Current Output of 4 to 20 mA and G3PX