Pepperl+Fuchs VDM28-8-L1-IO_73c_136 Distance Sensor

Technical Overview

The Pepperl+Fuchs VDM28-8-L1-IO/73c/136 is a universal distance sensor that utilizes Pulse Ranging Technology (PRT) for accurate, clear, and reproducible measurement results over a range of 0.2 to 8 meters. It features a red laser as the light emitter, is eyesafe (Laser Class 1), and includes an IO-Link interface for enhanced communication and diagnostics. The compact design and robust IP67 housing make it suitable for various industrial environments, offering reliable operation with two configurable push-pull digital outputs.

Key Features

Distance measurement using object.
Measuring method PRT (Pulse Ranging Technology).
Accurate, clear, and reproducible measuring results.
Red laser as the light emitter (660 nm wavelength).
Version with IO-Link interface.
Laser class 1, eyesafe.
2 push-pull (4 in 1) outputs, short-circuit and reverse polarity protected.
IP67 degree of protection.
Compact housing dimensions (88 mm H x 25.8 mm W x 54.6 mm D).
5-step rotary switch for operating modes selection.

Technical Specification Matrix

Parameter	Value
Measuring Range	0.2 ... 8 m
Operating Voltage	10 ... 30 V DC (18-30 V in IO-Link mode)
Degree of Protection	IP67
Ambient Temperature	-30 ... 55 °C (-22 ... 131 °F)
Absolute Accuracy	± 25 mm
Repeat Accuracy	5 mm
Light Source	Laser Diode (red light, 660 nm)
Laser Class	1
Connection	M12 (4-pin) Connector
Signal Output	2 push-pull (4 in 1) outputs, short-circuit protected, reverse polarity protected
Measuring Method	Pulse Ranging Technology (PRT)
Housing Material	ABS
Optical Face Material	Plastic pane

Industrial Applications

1. Conveyor Belt Object Positioning and Presence Detection

This sensor can precisely detect the presence and position of items on a conveyor belt, ensuring proper spacing and preventing jams. The 0.2 to 8m range and 5mm repeat accuracy enable reliable monitoring, while the two digital outputs can trigger actions like sorting or stopping the belt. Its IP67 rating ensures durability in typical factory environments.

Problem Solved

Ensures accurate object handling and prevents production line disruptions in automated material handling systems.

ConveyorObject DetectionPositioningMaterial HandlingDigital Output0.2-8m RangeIP67

2. Automated Storage and Retrieval System (AS/RS) Bin Level Monitoring

Mounted on an AS/RS crane, the VDM28-8-L1-IO/73c/136 sensor can accurately measure the fill level of bins or the presence of items on shelves within an 8-meter range. The IO-Link interface facilitates comprehensive data exchange with the control system for real-time inventory management and diagnostic capabilities.

Problem Solved

Optimizes warehouse space utilization, automates inventory management, and improves retrieval efficiency in AS/RS applications.

AS/RSInventory ManagementLevel SensingWarehouse AutomationIO-Link0.2-8m RangeAbsolute Accuracy ±25mm

3. Industrial Door/Gate Position Monitoring

Due to its robust IP67 rating and 0.2 to 8-meter detection range, this sensor is ideal for monitoring the open/closed position of industrial doors, gates, or safety barriers, even in dusty or wet conditions. The push-pull outputs can provide clear signals to a PLC for safety interlocking or operational control, enhancing workplace safety.

Problem Solved

Enhances safety by ensuring machinery operates only when gates are closed and provides operational feedback for access control in harsh industrial environments.

Industrial DoorGate PositionSafety InterlockIP67Environmental ResistanceDigital Output0.2-8m Range