HANYOUNG NUX LCD Digital Temperature Controller

Safety Information

DANGER: Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.

WARNING: Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.

CAUTION: Indicates a potentially hazardous situation which, if not avoided, may result in minor injury or property damage.

Please read the safety information carefully before use and use the product correctly. Alerts are classified into Danger, Warning, and Caution.

• Do not touch or contact the input/output terminals as it may cause electric shock.
• If the product is used with methods other than specified by the manufacturer, it may lead to injury or property damage.
• Install an appropriate protective circuit if a malfunction or incorrect operation may cause a serious accident.
• This product does not have a power switch or fuse; install these separately. (Fuse rating: 250V 0.5A)
• Supply the rated power voltage to prevent damage or failure.
• Turn off the power until wiring is complete to prevent electric shock or equipment failure.
• Do not use in places with combustible or explosive gas as this is not an explosion-proof structure.
• Never disassemble, modify, or repair the product to avoid malfunction, electric shock, or fire risk.
• Turn off the power when mounting/dismounting the product to prevent electric shock, malfunction, or failure.
• Use the product mounted on a panel while power is supplied to prevent electric shock.

Part Name and Function

Process-value (PV) display unit (RED): Displays the current process value.

Set-value (SV) display unit (RED): Displays the setpoint value.

Loop break alarm (LBA) (RED): Indicates a loop break alarm condition.

Low alarm (ALL) lamp (RED): Indicates a low alarm condition.

High alarm (ALH) lamp (RED): Indicates a high alarm condition.

Auto-tuning (AT) lamp (RED): Indicates when auto-tuning is active.

Control output (OUT) lamp (RED): Indicates when the control output is active.

Set-value increment Key: Increases the set value.

Set-value decrement Key: Decreases the set value.

Setting digit shift Key: Moves the digit selection for setting.

Set Key: Confirms the set value.

Diagram: A visual representation of the controller's display and buttons.

Specification

Dimensions and Panel Cutout

*1) +0.5 mm tolerance applied

*2) Socket type

Connections Diagram

A diagram illustrating the wiring connections for different models (KX2N, KX3N, KX4N, KX4S, KX7N, KX9N) is provided.

Specifications Summary

• Power Supply Voltage: 100 - 240 V a.c, 50 - 60 Hz or 24 V d.c
• Power Consumption: Below 11 VA max (KX2, 3, 7, 9), Below 7 VA max (KX4, KX4S)
• Input: Please refer to Input code table. Sampling cycle: 250 ms. Indication accuracy: ±0.5%. Allowable voltage: ±20 V d.c for 1 minute. Reference junction temperature: ±3.5 ℃, 0 ~ 50 ℃. Operation after input break: Up scale after input break, output OFF.
• Control Output: Relay (NO: 5A 250V a.c, 5A 30V d.c), Voltage output (ON voltage: >12V d.c min, Load resistance: 600 Ω min), Current output (Range: 4-20 mA d.c ±5%, Accuracy: ±0.2 mA, Load resistance: 600 Ω max).
• Retransmission Output: Range: 4-20 mA d.c (±5%), Accuracy: ±0.2 mA, Load resistance: 600 Ω max.
• Alarm Output: 250 V a.c, 3 A (Resistive load), refer to connection diagram (contact). KX4N: 1a contact, 250 V a.c 1A (load resistance).
• Contact Input: OFF resistance: 10 kΩ min, ON resistance: 1 kΩ max.
• Control Method: PID control, ON/OFF.
• Output Operation: Reverse action, Direct action.
• Anti-reset wind-up: Auto (A=0), 0.1 ~ 100.0 %.
• Insulation Resistance: 20 MΩ min between 1st and 2nd terminals.
• Dielectric Strength: 2,300 V a.c between 1st and 2nd terminals for 1 minute.
• Operating Environment: Temperature: 0 ~ 50 ℃, Humidity: 35 ~ 85 % R.H. (no condensation).

Suffix Code and Input Type

Suffix Code

Input Code for Input Type and Range

*1: The range 0 ~ 400 ℃ are excluded from the guaranteed range.

*2: The accuracy of the range less than 0 ℃ is ±1 % of F.S.

*3: ± 1 % of F.S

Note on 4-20 mA input: When using 4-20 mA input, connect a 0.1 % 250 Ω shunt resistor to the input terminal when the input mode is 1-5 V d.c.

Parameter Setting

Model Number Breakdown

Main Functions

• Loop Break Alarm (LBA): Detects heater break, sensor break, or manipulator malfunction by measuring the change in value over a set time when the control output is 0% or 100%. A dead band can be set to prevent false alarms.
• Auto Tuning (AT): Automatically measures, computes, and sets optimal PID or ARW constants. Initiate by pressing the [SET] and [AT] keys simultaneously while the temperature is increasing after power-on.
• ON/OFF Control Setting: Used for controlling devices like refrigerators, fans, or solenoid valves. Set the proportional band to 0 in standard mode. Hysteresis parameter will be displayed to prevent frequent ON/OFF operations.
• Input Filter: Selectable time (0-100 sec) to eliminate unstable PV values caused by noise. Setting to [0] disables the filter.
• Control Direction: Selectable between Reverse action (heating) [0] and Direct action (cooling) [1].
• Alarm Hold Operation: Turns off alarm output until the process value (PV) is outside the alarm range. Useful for preventing alarms during initial power-up when the PV is rising towards the set value.
• HYS Selection: Determines how hysteresis is applied: 0 for under set value, 1 for over and under set value.

Alarm Functions

• Deviation Alarm: Alarm activates when the PV deviates from the set value (SV) by a specified amount.
• Absolute Alarm: Alarm activates based on absolute PV thresholds.
• Band Alarm: Alarm activates when the PV is within a defined band around the SV.
• High & Low Alarm: Separate alarms for high and low PV thresholds.
• Hysteresis: A range around the alarm setpoint that prevents rapid switching of the alarm output. Can be set for high and low alarms.

Diagrams: Visual representations of alarm conditions (e.g., High alarm, Low alarm, Band alarm) and control actions are included.

Operation and Settings

• Control Mode: After power-on, the controller displays the model and firmware version, then enters control mode showing PV and SV. Pressing the [SET] key blinks the SV, allowing adjustment with [▲] and [▼] keys. Press [SET] again to confirm. Auto-tuning can be initiated by pressing [SET] and [AT] keys simultaneously.
• Standard Mode Setting: Allows frequent user settings like alarm parameters, ON/OFF operation, and hysteresis. PID auto-tuning can automatically set PID parameters.
• System Mode Setting: For initial setup and advanced parameter configuration. Enter by pressing [SET] and [ESC] keys simultaneously for 3 seconds in control mode. Return to control mode by pressing [ESC] for 3 seconds.
• Set Data Lock Function: Prevents changes to set values and auto-tuning activation. Options: 0000 (No lock), 0001 (SV changeable), 0010/0011 (All data locked).
• Up Scale and Down Scale: The PV display flashes "---" for over-scale or "___" for under-scale if the process value exceeds the input range limits.
• Input Scale: For DCV input, this sets the input range (e.g., 1-5V DCV).
• Alarm Delay Time: Sets a delay for High and Low alarms to activate.
• Anti-reset Windup (ARW): Prevents over-integral action. Can be set to Auto (A=0) or a specific value.
• Select Set Value (KX4S only): Allows selection of Set value 1 or Set value 2 via external contact input.

CAUTION: If the values of [Input selection] and [Unit selection] are changed, all temperature parameters will be initialized. [Set value 1] and [Set value 2] must be set first.

CAUTION: If the values of [Input scale] are changed for DCV input, [Max. Input scale] and [Min. Input scale] will be initialized.

CAUTION: If the alarm type is changed in [Alarm type selection], the values of alarm hysteresis ([High alarm HYS], [Low alarm HYS]) will be changed.

General Precautions

• Before using the temperature controller, compensate for any temperature difference between the controller's PV and the actual temperature.
• The contents of this manual are subject to change without prior notice.
• Ensure the product specifications match your order and that the product is not damaged during shipping.
• Use the product within the specified ambient operating temperature (0 ~ 50 ℃) and humidity (35 ~ 85 % R.H., no condensation).
• Avoid locations with corrosive or flammable gases.
• Avoid places with direct vibration or significant physical impact.
• Avoid places with water, oil, chemicals, steam, dust, salt, or iron.
• Do not wipe the product with organic solvents; use a mild detergent.
• Avoid locations with excessive inductive interference, electrostatic, or magnetic noise.
• Avoid locations with heat accumulation due to direct sunlight or radiant heat.
• Use the product at elevations below 2,000 m.
• Inspect the product if exposed to water due to risk of electric leakage or fire.
• For thermocouple (TC) input, use prescribed compensation lead wire.
• For RTD input, use lead wires with small resistance, and ensure all 3 leads have the same resistance.
• Keep input signal wires away from power lines and load lines to avoid inductive noise.
• Separate input signal wires from output signal wires; use shielded wires for input signals if separation is not possible.
• For thermocouple (TC), use ungrounded sensors to prevent malfunction due to electric leakage.
• Consider installing an insulated transformer or noise filter if there is significant noise from the power line.
• Twisted pair wiring for product power lines can be effective against noise.
• Ensure alarm functions are properly set for correct product operation.
• Turn off the power when replacing the sensor.
• For high-frequency operations (e.g., proportional operation), use an auxiliary relay or SSR to prevent shortening the output relay's lifespan.
• Contact output life expectancy: Mechanical - 1 million times min. (without load); Electrical – 100 thousand times min. (250 V a.c 3A: with rated load).
• Do not connect anything to unused terminals.
• Connect wires properly, observing terminal polarity.
• Use a switch or breaker (IEC60947-1 or IEC60947-3 approved) when mounting the product on a panel.
• Install a switch or breaker near the operator for easy access.
• Put a nameplate indicating power is off when the switch/breaker is activated.
• Periodic maintenance is recommended for proper and safe product use.
• Some parts have a limited expected life span and may deteriorate with age.
• The warranty is 1 year for the product (including accessories) when used for its intended purpose under normal conditions.
• When power is supplied, allow preparation time for contact output; use a delay relay for interlock circuits.
• When replacing a unit, check for compatibility as settings may differ even with the same model name and code.