6027430

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The Sick 6027430 photoelectric sensor, model VL18L-4P324, is a compact M18 barrel-style retro-reflective sensor designed for reliable object detection over long distances. Using visible red laser light and a dual-lens optical system, it offers a sensing range up to 35 m with a reflector and is well suited to detecting small objects where precise alignment and consistent performance are important. Its cylindrical metal housing measures 18 mm x 18 mm x 97.7 mm, making it a practical choice for installations where space is limited but dependable sensing is required.

Built for industrial environments, this sensor operates on a 10 to 30 V DC supply and provides a PNP switching output with selectable light/dark switching via the control input. A fast response time of up to 0.625 ms and switching frequency of 800 Hz support high-speed automation tasks, while the IP67 enclosure helps protect the device in demanding conditions. The VL18L-4P324 also features an M12 4-pin connector, teach-in sensitivity adjustment, and a laser Class 1 design, making it a strong option for packaging lines, conveyor systems, material handling equipment, and general factory automation applications.
Specification Description
Manufacturer Sick
Manufacturer Part Number 6027430
Model VL18L-4P324
Product Type Photoelectric retro-reflective sensor
Series V18
Operating Principle Retro-reflective sensing with dual-lens system and minimum distance to reflector
Housing Style Cylindrical barrel sensor
Housing Dimensions 18 mm x 18 mm x 97.7 mm
Thread Size M18 x 1
Optical Axis Axial
Light Source Visible red laser
Wavelength 650 nm
Laser Class Class 1 to IEC 60825-1
Laser Output Power 0.4 mW
Standard Sensing Range 0.1 m to 30 m
Maximum Sensing Range 0.1 m to 35 m
Reference Reflector P250F
Light Spot Size Approx. 9 mm diameter at 35 m
Focus / Beam Angle 0.04°
Special Application Suitable for detecting small objects
Output Type PNP
Switching Function Light-on / dark-on
Switching Selection Selectable via control input C
Max. Output Current ≤ 100 mA
Response Time ≤ 0.625 ms
Switching Frequency 800 Hz
Supply Voltage 10 V DC to 30 V DC
Ripple ± 10%
Current Consumption 20 mA without load
Connection Type 4-pin M12 male connector
Pin Assignment Pin 1 BN: L+, Pin 2 WH: C, Pin 3 BU: M, Pin 4 BK: Q
Adjustment Method Single teach-in button and electronic adjustment via control input C
LED Indicators Green LED for supply voltage, yellow LED for signal status
Polarizing Filter Yes
Enclosure Rating IP67
Protection Class Class III
Housing Material Nickel-plated brass and PC
Optics Material PC with protective glass pane
Operating Temperature -15 °C to +55 °C
Storage Temperature -25 °C to +70 °C
Weight 60 g
Reverse Polarity / Output Protection Reverse-polarity protected inputs and outputs with overcurrent and short-circuit resistant output stage
Certifications EU Declaration of Conformity, China RoHS, cULus
Included Items 2 metal fastening nuts

What type of sensor is this?

This unit is a photoelectric retro-reflective sensor in an M18 barrel-style housing. It is designed to detect objects by working with a reflector, making it a practical choice for conveyor systems, packaging equipment, and general industrial sensing tasks.

What sensing distance can this sensor achieve?

The nominal sensing range is 0.1 m to 30 m, with a maximum range of up to 35 m when used with a suitable reflector such as the P250F. Actual performance depends on the reflector used and the installation conditions.

Does this sensor require a reflector?

Yes. This is a retro-reflective design, so it is intended to operate with a reflector. The sensing distance will vary depending on the reflector type, and the best range is achieved with a reflector matched to the application.

What kind of light source does it use?

It uses a visible red laser with a wavelength of 650 nm. The device is classified as Laser Class 1 and is well suited to applications where a precise, clearly defined sensing beam is useful.

Is it suitable for detecting small objects?

Yes. This model is intended for detecting small objects and uses a tightly focused beam. At 35 m, the light spot size is approximately 9 mm, which helps with accurate target detection in applications where precision matters.

What output type does this sensor have?

It has a PNP switching output with a maximum output current of 100 mA. The switching mode supports light-on and dark-on operation, with selection available via the control input.

What supply voltage does it need?

The sensor operates on 10 V DC to 30 V DC and has a typical current consumption of 20 mA without load. This makes it compatible with many common industrial DC control systems.

How is the sensor connected electrically?

It uses a 4-pin M12 male connector. The standard pin assignment is pin 1 brown for L+, pin 2 white for control input C, pin 3 blue for M, and pin 4 black for output Q.

Can the sensitivity be adjusted?

Yes. Sensitivity can be adjusted using the single teach-in button on the sensor, and electronic adjustment is also possible through the control input. This gives added flexibility during setup and commissioning.

What is the response speed of the sensor?

This sensor offers a response time of 0.625 ms or less and a switching frequency of up to 800 Hz. That makes the 6027430 a strong option for fast-moving automation processes.

What housing and environmental protection does it offer?

The unit has a nickel-plated brass and polycarbonate housing with an IP67 enclosure rating. It is designed for operation in ambient temperatures from -15°C to +55°C, with storage temperatures from -25°C to +70°C.

What are the physical dimensions of the sensor?

The housing measures 18 mm x 18 mm x 97.7 mm and uses an M18 x 1 threaded barrel format. Its axial optical design makes it suitable for straightforward mounting in compact machine layouts.

This content has been produced using multiple sources. EU Automation takes no responsibility for the accuracy of this information. Always consult the original equipment manufacturer for the most up to date instructions and information.

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