1045990

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SICK 1045990, type AT20E-PM331 from the Ax20 range, is an industrial array sensor designed for edge detection, scanning, and reflector-based operation in automated registration and positioning applications. It uses a white LED light source with a 400 nm to 700 nm wavelength range and provides a 30 mm measurement range within a 90 mm to 110 mm working range. The sensor offers a 4 mA to 20 mA analog output with 12-bit resolution, a PNP switching output, and a fast 1 ms analog output rate for precise process feedback.

Built in a compact rectangular metal housing measuring 24.3 mm x 59.8 mm x 54.1 mm, the AT20E-PM331 is suitable for space-limited machine installations. It features a 50 mm x 10 mm light spot, 0.05 mm repeatability, 1.6 mm minimum detectable object size, and IP67 enclosure rating for use in demanding industrial environments. Electrical connection is made via a 5-pin M12 male connector, with reverse-polarity protection, short-circuit protected Q output, and interference pulse suppression. The unit operates from a 24 V DC supply and is suitable for ambient operating temperatures from -10 °C to +55 °C.
Specification Description
Manufacturer SICK
Part Number 1045990
Model AT20E-PM331
Series Ax20
Product Type Array sensor
Sensor Function Edge detection, scanning, and reflector operation
Housing Style Rectangular metal housing
Dimensions 24.3 mm x 59.8 mm x 54.1 mm
Sensing Distance Up to 100 mm
Working Range 90 mm to 110 mm
Measurement Range 30 mm
Minimum Detectable Object 1.6 mm
Light Source White LED
Wavelength 400 nm to 700 nm
Light Spot Size 50 mm x 10 mm
Repeatability 0.05 mm
Linearity ±2% of the analog current range
Supply Voltage 24 V DC, ±20%
Power Consumption Less than 3.1 W without load
Switching Output PNP
Switching Output Voltage PNP high: supply voltage less than or equal to 2 V; low: approximately 0 V
Analog Output 4 mA to 20 mA
Analog Output Resolution 12 bit
Analog Output Rate 1 ms
Maximum Output Current Less than 100 mA
Initialization Time 0.48 s typical, maximum 1.6 s
Connection Type Male M12 connector, 5-pin
Protection Class III
Enclosure Rating IP67
Circuit Protection Reverse-polarity protected supply connections, short-circuit protected Q output, and interference pulse suppression
Operating Temperature -10 °C to +55 °C
Storage Temperature -25 °C to +75 °C
Shock Resistance According to IEC 60068
Weight 135 g
Housing Material Metal
Included Item REF-AX-002 reflector, quantity 1
Classification ECLASS 27270906; ETIM EC001820; UNSPSC 39121528
Commodity Code 853650

What type of device is this?

This is an industrial array sensor from the Ax20 range, designed for edge detection using scanning and reflector-based operation. It is commonly used in registration and positioning applications where accurate detection of an object edge is required.

What sensing distance does it use?

The sensor is specified for a sensing distance of up to 100 mm, with a typical working range of 90 mm to 110 mm.

What is the measurement range?

The measurement range is 30 mm when operating at the 100 mm sensing distance.

What is the minimum detectable object size?

The minimum detectable object is 1.6 mm, making the sensor suitable for applications that require detection of small edge changes or narrow features.

What type of output does it provide?

It provides a PNP switching output and a 4 mA to 20 mA analog output. The analog output has 12-bit resolution and a 1 ms output rate.

What voltage does the sensor require?

The sensor is designed for operation at up to 24 V DC with a tolerance of ±20%. It should be used in a short-circuit protected network rated at a maximum of 8 A.

What connector is used on the sensor?

The device uses a 5-pin M12 male connector. The connection diagram identifies pin 1 as L+, pin 2 as QA, pin 3 as M, pin 4 as Q, and pin 5 as not connected.

What light source does the sensor use?

It uses a white LED light source with a wavelength range of 400 nm to 700 nm.

What is the light spot size?

At a sensing distance of 100 mm, the light spot size is 50 mm x 10 mm. At 25 mm sensing distance, the light spot size is 30 mm x 5 mm.

What level of repeatability is specified?

The sensor has a repeatability of 0.05 mm, referenced to the sensing distance.

What enclosure rating does it have?

The enclosure rating is IP67, meaning the housing is designed to resist dust ingress and temporary immersion conditions within the limits of the rating.

What are the operating temperature limits?

The specified ambient operating temperature range is -10 °C to +55 °C. The storage temperature range is -25 °C to +75 °C.

What are the physical dimensions?

The sensor measures 24.3 mm wide, 59.8 mm high, and 54.1 mm deep. Its rectangular housing is made from metal.

What accessories are typically used with it?

Typical accessories include 5-pin M12 female connectors, straight or angled sensor/actuator cables, and a stainless steel mounting bracket such as BEF-WN-DT20.

What is included with the device?

The listed scope of supply includes one REF-AX-002 reflector accessory with the AT20E-PM331, 1045990.

  • Edge detection on moving webs, sheets, labels, and packaging materials
  • Position monitoring for registration marks in automated production lines
  • Object detection where a wide light spot is needed to cover variable target positions
  • Reflector-based sensing for material presence and alignment checks
  • Scanning applications for detecting edges or transitions across a defined measurement range
  • Packaging machinery applications requiring fast, repeatable sensor feedback
  • Print and label handling systems requiring accurate mark or edge sensing
  • Conveyor systems used for presence detection and positioning of products or materials
  • Web guiding and material tracking in converting, printing, and processing equipment
  • Industrial automation systems requiring PNP switching output and analog position feedback

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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