Pepperl+Fuchs WCS3B-LS311 SSI Read Head (99290-0026)

The Pepperl Fuchs WCS3B-LS311 is a rugged, high-precision non-contact absolute position encoder featuring an SSI interface and robust construction for industrial environments.

Designed for demanding position feedback applications, it ensures reliable performance even under challenging conditions such as dust accumulation.

Technical Specifications

• Model: WCS3B-LS311
• Part Number: 36585
• Product Type: Non-Contact Absolute Position Encoder (Read Head)
• Application: Absolute position sensing along code rails
• Interface Type: SSI interface
• Data Output Code: Gray code, 25-bit
• Passage Speed: ≤ 12.5 m/s
• Measuring Length: Up to 314.5 m

Free Tolerances to Code Rail:

• Horizontal: 31 mm (± 15.5 mm)
• Vertical: 28 mm (± 14 mm)

Resolution: ± 0.4 mm (1,250 positions/m)

Electrical Interface

• Supply Voltage: 10 V DC to 30 V DC
• Power Consumption: 2 VA typical
• Connection Type: 8-pin, M12 x 1 industrial connector

Communication Interfaces:

• SSI (Synchronous Serial Interface)
• Gray code output, 25 bits

Clock Frequency: 100 kHz to 1000 kHz

Pause Time: ≥ 20 µs (double request possible if ≤ 10 µs)

Mechanical Data

• Enclosure Rating: IP54
• Housing Material: ABS, PC (Polycarbonate)
• Dimensions (W x H x L): 90 mm x 99 mm x 115 mm
• Mass: 500 g

Safety-Related Data

Functional Safety Parameters:

• MTTFd: 206 years
• Mission Time (TM): 20 years
• Diagnostic Coverage (DC): 0%

Ambient Conditions

• Operating Temperature: 0 °C to +60 °C (32 °F to 140 °F)
• Storage Temperature: -40 °C to +85 °C (-40 °F to 185 °F)
• Relative Humidity: 90% non-condensing

Certificates and Compliance

• European Conformity (CE)
• United Kingdom Conformity (UKCA)
• North American Certification (cCSAus)

Note: All product-related documents issued under Pepperl+Fuchs GmbH or Pepperl+Fuchs AG remain valid under Pepperl+Fuchs SE.

Applications

Ideal For:

• Absolute position tracking in harsh industrial environments
• Precision material handling systems
• Automated storage and retrieval systems (AS/RS)
• Assembly lines requiring exact positioning data

Key Features & Benefits

✅ Non-Contact Measurement: Absolute position sensing without mechanical wear.

✅ SSI Digital Interface: Simple and reliable communication for industrial automation systems.

✅ High Durability: Robust IP54-rated housing for challenging environments.

✅ Automatic Dirt Detection: Ensures consistent performance with dirt accumulation monitoring.

✅ Wide Operating Temperature Range: Suitable for diverse environmental conditions.

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