Description

PEPPERL+FUCHS PRINT MARK CONTRAST SENSOR, DK20/49

DK20/49, PRINT MARK CONTRAST SENSOR

Pepperl+Fuchs DK20/49 Print Mark Contrast Sensor – High-Speed, Precise Detection

The Pepperl+Fuchs DK20/49 is a high-performance print mark contrast sensor designed for rapid and precise detection in industrial automation environments. With its RGB light source, 30 µs response time, and static teach-in feature, this sensor provides exceptional accuracy in identifying print marks on a variety of surfaces. Its robust IP67-rated design ensures durability in demanding applications.

Advanced Sensing Technology

The DK20/49 utilizes a high-resolution RGB LED light source, automatically selecting the optimal color (green, red, or blue) to maximize contrast detection. This enables accurate differentiation between print marks and backgrounds on various materials, including paper, plastic, and metal surfaces. The rectangular light spot (1 mm x 4 mm) enhances precision, ensuring reliable performance in high-speed industrial applications.

The 30 µs response time and 16.5 kHz switching frequency make it suitable for extremely fast scanning processes, preventing detection delays in automation systems.

User-Friendly Setup and Configuration

Designed for ease of use, the static teach-in function allows for quick and automatic switching threshold adaptation, enabling seamless calibration with minimal effort. The sensor also includes an external teach-in input, offering flexible integration into automated systems.

The LED indicators provide real-time feedback:

• Yellow LED indicates switching operation (lights up when a print mark is detected)
• Slow flashing signals teach-in operation
• Fast flashing alerts users of potential operational issues

Versatile Industrial Applications

The DK20/49 contrast sensor is widely used in printing, packaging, labeling, and manufacturing industries, where high-speed and high-accuracy print mark detection is essential. It is ideal for detecting:

• Print registration marks on packaging materials
• Labels on various substrates
• Contrast differences in automated production lines

Its compact design and 90° optical system adjustment allow flexible mounting and integration into existing systems without requiring major modifications.

Durable & Industry-Ready Design

The DK20/49 is built for reliability in harsh industrial environments, featuring a PC (glass-fiber-reinforced Makrolon) housing and a glass optical face for enhanced durability. Its IP67-rated enclosure ensures protection against dust, moisture, and mechanical stress, making it suitable for challenging operating conditions.

Additionally, its M12 5-pin connector enables quick and secure installation, reducing downtime and improving operational efficiency.

Specifications

General specifications
Sensor range		9.5 mm ± 3 mm
Light source		LED
Light type		Visible green/red/blue, modulated light
Light spot representation		rectangular 1 mm x 4 mm ,
Angle deviation		max. ± 3°
Ambient light limit
	Continuous light	7000 Lux
Teach-in		static Teach-In

 

Functional safety related parameters
MTTFd		650 a
Mission Time (TM)		20 a
Diagnostic Coverage (DC)		0 %

 

Indicators/operating means
Function indicator		LED yellow; switching operation: lights up if print mark is detected Teach-In operation: flashing slowly alarm display: flashing quickly, if no safe operation is possible
Control elements		Teach-In key

 

Electrical specifications
Operating voltage		10 … 30 V DC
Ripple		10 %
No-load supply current		≤ 70 mA

 

Input
Function input		Teach-In input

 

Output
Switching type		light/dark on switchable, results from the order of the Teach-In
Signal output		1 PNP and 1 NPN short-circuit protected, open collector, synchronized-switching
Switching voltage		PNP: ≥ (+UB -2.5 V) , NPN: ≤ 1.5 V
Switching current		max. 200 mA
Switching frequency		16.5 kHz
Response time		30 µs

 

Conformity
Product standard		EN 60947-5-2

 

Compliance with standards and directives
Standard conformity
	Shock and impact resistance	IEC / EN 60068. half-sine, 40 g in each X, Y and Z directions
	Vibration resistance	IEC / EN 60068-2-6. Sinus. 10 -150 Hz, 5 g in each X, Y and Z directions

 

Approvals and certificates
EAC conformity		TR CU 020/2011
UL approval		cULus Listed , Class 2 power source
CCC approval		CCC approval / marking not required for products rated ≤36 V

 

mbient conditions
Ambient temperature		-20 … 60 °C (-4 … 140 °F)
Storage temperature		-20 … 75 °C (-4 … 167 °F)

 

Mechanical specifications
Degree of protection		IP67
Connection		5-pin, M12 x 1 connector
Material
	Housing	PC (glass-fiber-reinforced Makrolon)
	Optical face	glass
Mass		200 g
Dimensions
	Height	85.6 mm
	Width	33 mm
	Depth	60.8 mm

 

Datasheet: PDF

Reliable Performance & Cost-Effective Solution

The Pepperl+Fuchs DK20/49 contrast sensor combines high-speed, accurate detection with easy integration and rugged durability. Whether in printing, labeling, or industrial automation, this sensor offers consistent and reliable results to optimize production efficiency while keeping operational costs low.

Looking for a Reliable Alternative?

If you need an alternative to the Pepperl+Fuchs DK20/49, consider the Leuze Electronic KRT21M-09.PL3/42-M12. Both models share: RGB LED light source for optimized contrast detection Fast response time (30 µs) and high switching frequency (16.5 kHz) PNP/NPN output options for flexible integration Industrial-grade housing with IP67 protection M12 connector for secure and easy connections

Authorized Distributor of Leuze Electronic in Bangladesh

At Voltec Engineering Limited, we are the authorized distributor of Leuze Electronic products in Bangladesh. Our expert team is ready to assist you in selecting the right contrast sensor for your specific automation needs. We provide quick delivery and technical support to ensure seamless operations.

For more details or order , contact us today! We offer competitive pricing, genuine products, and exceptional customer service to meet your industrial automation requirements.

More Contrast Sensor Models from Pepperl+Fuchs

In addition to the DK20/49, we offer a wide range of Pepperl+Fuchs contrast sensor models to meet various industrial automation needs. Here’s a list of additional models available:

DK10/31
DK10/48
DK20/31
DK20/48
DK50-UV
DK50-UV/110
DK50-UV/123
DK50-UV/126
DK50-UV/145
DK50-UV/150
DK50/31
DK50/49
DK50/52
DK50/66
DK50/78
DK50/84
DK80/49
DK80/66
DK80/78
DK80/84
DK80/96
DK90/66
DK90/78
DK90/84
DK90/96
DK90/110
DK90/123
DK90/126
DK90/145
DK90/150
DK90/UV

These models provide various detection capabilities and configurations, ensuring reliable and precise contrast detection for different automation needs.