Pepperl+Fuchs WCS3B-LS221H Absolute Position Read Head

Technical Overview

Non-contact absolute position read head with RS-485 interface, extended -40 to 60 °C operating temperature, and automatic dirt detection.

Key Features

RS-485 interface for data communication.
Non-contact, absolute position encoder.
Automatic detection of dirt accumulation.
Extended operating temperature range of -40 ... 60 °C due to integrated heater.
Binary code data output.
5-pin, M12 x 1 connector.
LED indicators for power (green), data flow (yellow), and error (red).
Includes mounting plate.

Technical Specification Matrix

Parameter	Value
Operating Voltage (UB)	10 ... 30 V DC
Power Consumption (P0)	11 VA at 24 V DC
Interface Type	RS 485 interface
Data Output Code	Binary code
Transfer Rate	62.5 kBit/s
Passage Speed (v)	≤ 12.5 m/s
Max. Measuring Range	314.5 m
Resolution	± 0.4 mm (1,250 positions/m)
Operating Temperature	-40 ... 60 °C (-40 ... 140 °F)
Storage Temperature	-40 ... 85 °C (-40 ... 185 °F)
Connection Type	5-pin, M12 x 1 connector
Degree of Protection	IP54
Housing Material	ABS / PC
MTTFd	82 a
Mission Time (TM)	10 a
Physical Weight (kg)	0.5
Dimensions L x W x H (cm)	12.8 x 5.5 x 9.9

Industrial Applications

1. Automated Storage and Retrieval Systems (AS/RS) in Cold Warehouses

The WCS3B-LS221H precisely tracks the position of shuttles or stacker cranes in AS/RS. Its non-contact, absolute position encoding offers accuracy over long distances (up to 314.5 m) and high speeds (≤ 12.5 m/s). The extended operating temperature range of -40 to 60 °C, due to the 'H' heater option, makes it perfectly suited for challenging cold chain logistics and frozen food storage where standard sensors would fail.

Problem Solved

Ensures accurate and reliable real-time positioning of equipment in extremely cold environments, preventing operational failures and ensuring efficient inventory management.

Absolute positioningCold chainAutomated logisticsRS-485 communicationExtended temperature rangeNon-contact sensing

2. Gantry Systems for Material Handling in Dirty Production Facilities

This read head provides robust position feedback for overhead gantry cranes or robotic manipulators moving heavy loads in environments with dust and particulate matter, such as foundries or woodworking shops. The IP54 rating protects against dust ingress and splashing water, while automatic detection of dirt accumulation maintains performance and signals maintenance needs, ensuring continuous and safe operation.

Problem Solved

Provides precise position control for heavy-duty material handling in harsh, dirty industrial settings, reducing downtime caused by environmental contamination and ensuring operational safety.

Gantry craneMaterial handlingAbsolute encoderIP54Dirt detectionRobust position feedback

3. High-Speed Conveyor Belt Synchronization in Automotive Manufacturing

In automotive assembly lines, critical robotic welding, painting, and assembly tasks require precise synchronization of high-speed conveyor belts. The WCS3B-LS221H's high passage speed (≤ 12.5 m/s) and fine resolution (± 0.4 mm) enable accurate, real-time tracking of conveyor positions. The RS-485 interface provides reliable data communication for seamless integration with PLC or motion control systems.

Problem Solved

Enables precise and synchronized movement of components on high-speed conveyors, crucial for automated manufacturing processes requiring tight tolerances and continuous operation.

Conveyor synchronizationAutomotive assemblyHigh-speed tracking0.4 mm resolutionRS-485Absolute position feedback