What Is the SICK DL50-N1123?

The SICK DL50-N1123 is a high-precision optical distance sensor from the Dx50 series. It uses HDDM™ time-of-flight measurement to deliver a 200 mm to 50,000 mm range on Diamond Grade reflective tape with ±7 mm accuracy.

Built for demanding environments, this sensor combines a zinc die-cast housing with IP65 protection. It operates from -30 °C to +65 °C as standard, with cooling plates extending the upper limit to +80 °C or +140 °C. This unit is a dependable choice for mission-critical position and distance feedback in oil and gas automation.

Key Features and Technical Specifications

• Measurement Principle: HDDM™ optical time-of-flight for stable readings under varying ambient light.
• Measuring Range: 200 mm ... 50,000 mm on Diamond Grade reflective tape.
• Accuracy: ± 7 mm with repeatability ≥ 2 mm.
• Light Source: Visible red laser diode, 658 nm, Class 1 eye-safe per IEC 60825-1:2014.
• Response Time: Fast 15 ms / Slow 30 ms (averaging setting).
• Supply Voltage: DC 10 V ... 30 V, reverse-polarity protected.
• Power Consumption: ≤ 2.1 W without external load.
• Outputs: 1x NPN digital (≤ 100 mA) and 1x analog current (4 mA ... 20 mA, ≤ 300 Ω, 16-bit).
• Electrical Connection: Male connector M12, 5-pin.
• Enclosure Rating: IP65 (EN 60529).
• Housing: Zinc die-cast (ZNAL4CU1) with acrylic glass (PMMA) optical window.
• Dimensions: 36.1 mm x 62.7 mm x 57.7 mm; weight approx. 200 g.
• Operating Temperature: -30 °C ... +65 °C standard; up to +80 °C with 2 cooling plates; up to +140 °C with 2 cooling plates and protection filter (Uv ≤ 24 V).
• Storage Temperature: -40 °C ... +75 °C.

The wide supply voltage range and low power draw simplify integration into existing 24 V control systems. The rugged zinc die-cast housing resists vibration and impact, while the IP65 rating protects against dust and water jets.

Applications in Oil and Gas Automation

Oil and gas operations demand reliable position feedback in harsh conditions. This unit excels in applications such as tank level monitoring, where its 50 m range and ±7 mm accuracy provide dependable readings. In pipeline valve position sensing, the sensor's fast 15 ms response time enables precise control.

For crane and hoist positioning on drilling rigs, the rugged housing and wide temperature range ensure consistent performance. The Class 1 laser is eye-safe, reducing safety concerns in accessible areas. Additionally, the analog 4-20 mA output integrates seamlessly with legacy control systems, while the NPN digital output supports simple limit detection.

Installation and Setup

Mount the sensor using the M12 5-pin connector for electrical connection. Ensure the supply voltage is within DC 10 V ... 30 V and observe reverse-polarity protection. The sensor features a high-resolution LC display and menu buttons for easy configuration of response time and output modes.

For extended temperature applications, attach the optional cooling plates as specified in the datasheet. Maintain a clear line of sight to the Diamond Grade reflective tape for accurate distance measurement. The IP65 rating requires proper sealing of the connector during installation.

Maintenance and Reliability

This unit is built for long-term reliability with minimal maintenance. Periodically inspect the optical window for dust or debris and clean with a soft cloth. The zinc die-cast housing resists corrosion in harsh environments. The sensor's repeatability of ≥ 2 mm ensures consistent performance over time.

In high-temperature applications, verify that cooling plates are functioning and that ambient temperature does not exceed specified limits. Regular checks of the M12 connector for tightness prevent moisture ingress. With no moving parts, the sensor offers high reliability you can depend on.

Frequently Asked Questions

What is the measurement range of the SICK unit?

The SICK unit measures distances from 200 mm up to 50,000 mm when using Diamond Grade reflective tape.

Can This unit operate in high-temperature environments?

Yes, the standard operating temperature range is -30 °C to +65 °C. With two cooling plates, it extends to +80 °C, and with two cooling plates plus a protection filter, it reaches +140 °C (Uv ≤ 24 V).

What output signals does This unit provide?

The sensor offers one NPN digital output (≤ 100 mA) and one analog current output (4 mA ... 20 mA, ≤ 300 Ω, 16-bit), plus a multifunctional input.

Is This unit eye-safe?

Yes, it is Class 1 laser product per IEC 60825-1:2014 and EN 60825-1:2014, making it eye-safe under normal operating conditions.

What is the supply voltage requirement for This unit?

The sensor requires a DC supply voltage between 10 V and 30 V and is reverse-polarity protected.

Contact PetroPartsOnline for parts suited to your application's requirements.

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