Schmersal FWS3505C-2204 Standstill Monitoring Module Overview
The Schmersal FWS3505C-2204 is an advanced safety monitoring module engineered to detect machine standstill conditions using two impulse sensors. Designed for applications with dangerous run-on movements, this device allows safety guard doors or solenoid interlocks to be safely unlocked only after complete motion cessation has been verified. It features dual-channel microprocessor control and complies with rigorous industrial safety standards up to Control Category 3.
Technical Specifications & Mechanical Data
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Housing Material: Glass-fibre reinforced thermoplastic enclosure.
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Mounting: Snaps onto standard DIN rails to EN 50022.
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Degree of Protection: IP40 for enclosure and IP20 for screw terminal connections.
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Operating Voltage: 24 VDC (-15% / +15%).
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Monitored Inputs: 2 channels, pulse generator p-type.
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Standstill Frequency: Version C input configuration (1 Hz / 1 Hz).
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Enabling Outputs: 4 safety enabling paths alongside 2 short-circuit proof transistor outputs.
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Ambient Temperature Range: 0 °C to +55 °C.
