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Thank you for purchasing HANYOUNG NUX Co.,Ltd. product.
Please check whether the product you purchased is the exactly same
as you ordered. Before using this product, please read instruction
manual carefully.

Display 

Power voltage

Model

Specification

10 % from supply voltage

LCD display

LF4N-A, LF4N-D

LF4N-B, LF4N-C

LF4N-A, LF4N-D

LF4N-A, LF4N-D

LF4N-A, LF4N-D

LF4N-B, LF4N-C

Contact relay : 250 V a.c 3 A (Load Resistance)

Min 100 M

(Based on 500 V d.c)

2000 V a.c  50 / 60 Hz  for 1 minute  

2000 V Max.

10 - 55 Hz double amplitude 0.75 mm

10 - 55 Hz double amplitude 0.5 mm

300 

(Less than 30 G)

100 

(Less than 10 G)

Over 1,000 million (Open & Short frequency : 180 / min)

Over 10 million (250 V a.c 3 A load Resistance)

Plug 8PIN, Plug 11PIN

1.5 W (240 V d.c), 4.4 VA (240 V a.c)

2.2 W (240 V d.c), 7.2 VA (240 V a.c)

Over 20 ms (START, INHIBIT, RESET)

Max. 0.01 %  0.05 second (In case of Power-on start)

Max. 0.005 %  0.03 second (In case of Signal-on start)

0.01 %  0.05 second (In case of Power-on start)

Non voltage input 

Impedance in a short circuit : Max. 2 

Residual voltage in a short circuit : Max. 0.7 V d.c

Impedance in open : Min. 100 

-10 ~ 55 

(No condensation)

-20 ~ 65 

(No condensation)

35 ~ 85 % R.H.

About 110 g (Include Fixing bracket)

24 - 240 V a.c / d.c  50 - 60 Hz

LF4N

Voltage regulation      

Power 

consumption

Minimum Signal Time

Input

condition

START Input

INHIBIT Input

RESET Input

Repeatability 

of operating time

Control output 

Insulation Resistance

Dielectric strength

Impulse Voltage 

Vibration 

Shock

Life

expectancy

Mechanical

durability

Malfunction

durability

Mechanical

durability

Malfunction

durability

Mechanical 

Electrical

Terminal type

Operation ambient 

temperature

Storage temperature

Operation ambient humidity

Weight

MD0305E0809010

1. If there is a possibility of an accident caused by errors or malfunctions of this product,

install external protection circuit to prevent the accident.

2. This product does not contain an electric switch or fuse, so the user needs to install a

separate electric switch or fuse externally. (Fuse rating : 250 V 0.5 A)

3. To prevent defection or malfunction of this product, supply proper power voltage in

accordance with the rating.

4. To prevent electric shock or malfunction of this product, do not supply the power until the

wiring is completed.

5. Since this product is not designed to explosion-protective structure, do not use it at the

places which have flammable or explosive gas. 

6. Do not disassemble, modify, revise or repair this product. This may cause malfunction,

electric shock or fire.

7. Attach or detach this product while the power is off. Otherwise, it may cause malfunction

or electric shock.

8. It you use the product with methods other than specified by the manufacturer, there may

be bodily injuries or property damages.

9. Due to the danger of electric shock, use this product installed onto a panel while an

electric current is applied.

1. The contents of this manual may be changed without prior notice.
2. Please check whether the product you purchased is the exactly same as you ordered.
3.Please check whether the product has no damage or abnormality during 

delivery.

4. Do not use this product with time setting “0”
5. Change setting time in condition of “Power OFF”. If change setting time in condition of 

“Power On”, reset should be done.

6. Do not use the product at the places which have corrosive(especially noxious gas or

ammonia) or flammable gas.

7. Do not use this product at any place with direct vibration or impact.
8. Do not use this product at any place with liquid, oil, medical substances, dust, salt or iron

contents. (Pollution level 1 or 2)

9. Do not polish this product by substances such as alcohol or benzene. 
10. Do not use this product at any place with excessive induction trouble, static electricity or

magnetic noise.

11. Do not use this product at any place with possible thermal accumulation due to direct

sunlight or heat radiation.

12. Install this product at place under 2,000m in altitude.
13. When the product gets wet, the inspection is essential because there is danger of an

electric leakage or fire.

14.If there is an excessive noise from power supply, it is recommended to use insulating  

transformer and noise filter.  The noise filter must be attached to the panel grounded and 

wiring between the filter output side and power supply terminal should be as short as 

possible.

15. If gauge cables are arranged too closely, the effect on noise may occur.  
16. Do not connect anything to the unused terminals.
17. After checking polarity of terminal, connect wires to the right position.
18. When this product is connected to a panel, use a circuit breaker or switch approved by

IEC947-1 or IEC947-3.

19. Install the circuit breaker or switch at near place for convenient use.
20. Write down on a label that the operation of circuit breaker or switch disconnects the

power since the devise is installed.

21. For the continuous and safe use of this product, the periodic maintenance is

recommended.

22. Some parts of this product have limited life span, and others are changed by their usage.
23. The warranty period of this product including parts is one year if this product is properly used.
24. When power is on, the preparation period of contact output is required. In case of using

signals of external interlock circuit, use a delay Relay.

Safety Information

Do not touch or contact the input/output terminals because they may cause electric
shock.

DANGER

WARNING

CAUTION

Please read safety information carefully before use and then use this product
properly. Safety information described in this manual contains important contents
related with safety. So please follow the instructions accordingly. Safety
information is composed of DANGER, WARNING and CAUTION.

Max. 0.1 second

Resetting time  

HEAD / OFFICE

1381-3, Juan-Dong, Nam-Gu Incheon, Korea

TEL: (82-32)876-4697  FAX : (82-32)876-4696

Model

Model

Time limit 1c

Time limit 2c

Time limit 1c 

Instantaneous 1c

Time limit 1c

10 kinds

Fixing A mode

No Input

10 kinds

RESET,START,INHIBIT

RESET,START,INHIBIT

24 - 240 V a.c / d.c  50 - 60 Hz

8 Pin socket  

10 kinds of timing ranges

11 Pin socket   

Power voltage

Socket 

Output

Timing range 

Output operations

Input signal

Dimensions and Panel Cutout

(Unit : mm)

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