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WFM120-120P321

The SICK WFM120-120P321 is a robust photoelectric fork sensor designed for precise object detection in industrial automation applications. It is part of SICK's WFM series, known for its reliability and ease of integration.

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Technical Specifications:
Parameter Details
Type Type 4 Safety Light Grid (IEC 61496-1/2)
Detection Area 120 mm × 120 mm (W×H)
Resolution 20 mm (finger/hand detection)
Number of Beams 6 × 6 (36 beams total)
Operating Range 0.3 m to 3 m
Response Time ≤ 15 ms
Light Source Infrared (860 nm)
Electrical Characteristics:
Operating Voltage: 24 V DC ±20%

Current Consumption: ≤ 500 mA

Outputs: 2 OSSD (Output Signal Switching Devices), PNP, 100 mA each

Control Inputs: 2 (e.g., muting, reset)

Protection: Short-circuit and reverse polarity protection

Mechanical & Environmental Properties:
Housing Material: Aluminum with polycarbonate windows

Protection Rating: IP65

Dimensions: 140 mm × 140 mm × 45 mm (W×H×D)

Weight: ≈ 0.8 kg

Operating Temperature: -10 °C to +50 °C

Storage Temperature: -25 °C to +70 °C

Safety Ratings:
Safety Integrity Level (SIL): SIL 3

Performance Level (PL): PL e

Mean Time to Dangerous Failure (MTTFd): > 100 years

Diagnostic Coverage (DC): > 99%

Key Features:
Compact Grid Design: Ideal for confined spaces on machinery.

High Resolution: 20 mm spacing for reliable finger detection.

Fast Response Time: ≤ 15 ms for immediate hazard mitigation.

Easy Integration: Simple mounting and alignment with built-in indicators.

Flexible Configuration: Programmable via SICK’s SOPAS software.

Robust Construction: Resists oils, coolants, and mechanical impacts.

Typical Applications:
Mechanical power presses

Stamping and bending machines

Small assembly automation cells

Robotic welding guards

Packaging machinery point-of-operation