Heschen SN04-N2 Inductive Proximity Sensor Instruction Manual

1. Product Overview

The Heschen SN04-N2 is a square-type, non-shielded inductive proximity sensor designed for reliable detection of metallic objects without physical contact. This NPN Normally Closed (NC) sensor operates within a 10-30V DC power supply range and provides a 200mA output current. Its compact design and robust features make it suitable for various industrial automation applications.

Key Features:

Detection Distance: 5mm ± 10%.
Power Supply: 10-30V DC.
Output Current: 200mA.
Output Type: NPN, Normally Closed (NC).
Installation Type: Non-shielded (flush mounting is not required).
Dimensions: 18 x 18 x 34 mm.
Protection: Power supply reversal connection protection and short-circuit protection.
Indicator: Red LED indicates the sensor's operating state.

Heschen SN04-N2 Inductive Proximity Sensor with detailed dimensions. — This image displays the Heschen SN04-N2 inductive proximity sensor, highlighting its physical dimensions in millimeters and inches. It shows the square body, cable length, and mounting holes.

2. Installation and Wiring

Proper installation and wiring are crucial for the sensor's optimal performance and safety. The SN04-N2 is a 3-wire NPN Normally Closed sensor. Ensure the power supply is disconnected before proceeding with wiring.

Wiring Instructions:

Brown Wire (BN): Connect to the positive (+) terminal of the DC power supply (10-30V DC).
Blue Wire (BU): Connect to the negative (-) terminal (0V) of the DC power supply.
Black Wire (BK): This is the NPN Normally Closed output. When no object is detected, the output is ON (connected to 0V). When a metallic object is detected, the output switches OFF (open circuit). This output can be directly connected to a PLC input.

Wiring diagram for Heschen SN04-N2 NPN Normally Closed inductive proximity sensor. — This image provides the wiring diagram for the SN04-N2 sensor. It illustrates the 3-wire NPN Normally Closed configuration with Brown (+V), Black (Output), and Blue (0V) connections. The diagram also shows the internal circuit representation.

The sensor is a non-shielded type, meaning it can be mounted without requiring a metal-free zone around its sensing face. However, ensure sufficient clearance from other metallic objects to prevent interference.

3. Operation Principles

The SN04-N2 operates on the principle of electromagnetic induction. It generates a high-frequency electromagnetic field from its sensing face. When a metallic object enters this field, eddy currents are induced in the object, which in turn dampens the sensor's oscillation. This change in oscillation is detected by the sensor's internal circuitry, triggering the output switch.

Detection Characteristics:

Detection Object: The sensor is designed to detect magnetic metals. The detection distance can vary based on the material and size of the object.
LED Indicator: A red LED on the sensor illuminates when a metallic object is detected within the sensing range, providing visual feedback on its operational status.

Heschen SN04-N2 inductive proximity sensor detecting a metal object. — The image shows the SN04-N2 sensor positioned near a metal object, demonstrating its detection capability. The red LED indicator on the sensor is illuminated, signifying active detection.

Graphs showing detection ratio for different materials and effect of object size on detection distance for SN04-N2 sensor. — This image includes two graphs. The first graph shows the detection ratio for various materials (Iron, Stainless Steel, Brass, Aluminum, Copper). The second graph illustrates how the size of the detecting object affects the detection distance, indicating a stable detection range.

Video Demonstration:

This video demonstrates the Heschen SN04-N2 inductive proximity sensor in operation, showing its Normally Closed (NC) behavior as it detects and releases a metallic object. The red LED indicator provides visual confirmation of detection.

4. Technical Specifications

Below are the detailed technical specifications for the Heschen SN04-N2 Inductive Proximity Sensor:

Detailed specifications table for Heschen SN04-N2 inductive proximity sensor. — This table outlines the technical specifications of the SN04-N2 sensor, including detection distance (0-4mm), voltage (10-30VDC), current (200mA), standard detection object (SPCC 18*18*1mm), working temperature (0°C to +50°C), response frequency, insulation impedance, withstand voltage, housing material (Nickel Plated Brass), and detection surface material (ABS).

Specification	Value
Model	SN04-N2
Detection Distance	5 mm ± 10%
Operating Voltage	10-30V DC
Output Current	200 mA
Output Type	NPN, Normally Closed (NC)
Installation Type	Non-shielded
Standard Detection Object	SPCC 18181mm
Working Temperature	0°C to +50°C
Response Frequency	DC: 0.5kHz, AC: 25Hz
Insulation Impedance	50MΩ above (DC500V megameter)
Withstand Voltage	AC1000V 50/60Hz
Housing Material	Nickel Plated Brass
Detection Surface Material	ABS
Color	Blue
Connector Type	Screw Terminal
Certifications	CE

5. Applications

The Heschen SN04-N2 inductive proximity sensor is versatile and can be integrated into various industrial and automation systems to meet diverse needs.

Heschen SN04-N2 sensor integrated with various industrial components like Relay, Microcontroller, Contactor, and PLC. — This graphic illustrates the versatility of the SN04-N2 sensor, showing its compatibility with different industrial interfaces such as relays, microcontrollers, contactors, and PLCs. It also highlights applications like RPM monitoring, product consistency, delay detection, and product counting.

Typical Scenarios Include:

Industrial Machinery: Position sensing, limit switching, and object detection in automated production lines.
Elevator Control: Detecting car position or door status.
Intelligent Transportation: Vehicle detection or counting.
Security Surveillance: Presence detection in restricted areas.
Textile Machines: Thread break detection or material positioning.
Packaging Equipment: Product counting, package positioning, or jam detection.
Integration with PLCs: Direct connection to Programmable Logic Controllers for process automation.

Heschen SN04-N2 sensor applicable scenarios including industrial machinery, elevator control, and packaging equipment. — This image presents several applicable scenarios for the SN04-N2 sensor, including industrial machinery, elevator control systems, intelligent transportation, security surveillance, textile machines, and packaging equipment, showcasing its wide range of uses.

6. Troubleshooting

If you encounter issues with your SN04-N2 sensor, consider the following troubleshooting steps:

No Detection / Intermittent Detection:
- Verify the power supply voltage is within the 10-30V DC range.
- Check wiring connections for proper polarity and secure contact.
- Ensure the detected object is metallic and within the 5mm sensing range.
- Confirm the object size is sufficient for reliable detection (refer to detection characteristics).
- Check for nearby strong electromagnetic fields that might interfere with the sensor.
Sensor Always ON (Output Active):
- As an NPN Normally Closed (NC) sensor, the output should be ON when no object is present. If it's always ON even with an object, check the wiring for correct NPN NC configuration.
- Ensure no metallic objects are permanently within the sensing range.
Sensor Always OFF (Output Inactive):
- Check for power supply issues or a broken wire.
- Verify the load connected to the output is functioning correctly.
LED Indicator Not Working:
- Check power supply and wiring.
- If the sensor is otherwise functional, the LED might be faulty, but the sensor should still operate.

If problems persist after these steps, contact Heschen customer support for further assistance.

7. Maintenance

The Heschen SN04-N2 inductive proximity sensor is designed for low maintenance. Follow these guidelines to ensure its longevity and reliable operation:

Cleaning: Keep the sensing face free from dirt, dust, metal shavings, and other debris. Use a soft, dry cloth for cleaning. Avoid abrasive cleaners or solvents that could damage the sensor housing.
Environmental Conditions: Ensure the sensor operates within its specified temperature range (0°C to +50°C) and avoid exposure to excessive moisture or corrosive substances.
Physical Inspection: Periodically inspect the sensor and its cable for any signs of physical damage, wear, or loose connections.
Mounting Security: Verify that the sensor remains securely mounted to prevent movement or misalignment that could affect detection accuracy.

8. Warranty and Support

Heschen products are manufactured to high-quality standards. For warranty information, technical support, or service inquiries, please refer to the contact details provided with your purchase or visit the official Heschen website. Please have your product model number (SN04-N2) and purchase details ready when contacting support.

Heschen SN04-N2