Pepperl+Fuchs – SB4‑OR‑4XP‑4M – 4‑Channel Safety Control Unit, SIL 3/PL e, 24VDC

The SB4‑OR‑4XP‑4M from Pepperl+Fuchs is a high-integrity safety control unit for machine safeguarding using through-beam sensors, safety light curtains/grids, emergency stops, or safety mats. Rated for maximum safety performance (SIL 3, Category 4, PL e), this evaluation module supports complex muting and restart interlock functions. It provides reliable monitoring and safe relay outputs (OSSDs) to meet industrial automation and processing safety standards.

Key Features:

• Model: SB4‑OR‑4XP‑4M (Pepperl+Fuchs P/N 192147)

• Safety Compliance: IEC/EN 61496‑1 Type 4, SIL 3, PL e, Cat 4  

• Input Channels: 4 sensor channels for through-beam photoelectric sensors (e.g., SLA/SLA40), light curtains/grids, safety mats, emergency stops  

• Supply: 19.2–28.8 V DC (≤500 mA standby)  

• Safety Outputs: 2 force-guided relay outputs (OSSDs); contact rating 6 A @ 250 V AC/24 V DC  

• Auxiliary Outputs: PNP auxiliary signaling (≤300 mA) for diagnostics and status  

• Diagnostics:

  • 7‑segment display plus LEDs for channel status, OSSD, muting, and error states  

  • Stability alarm and relay monitoring included  

• Operating Modes:

  • DIP-switch configurable: start/restart enable, sequential/parallel or double muting, emergency muting for material jams  

• Response Time: Safe reaction within 38 ms  

• Status Indicators: Multiple LEDs indicate sensor readiness, OSSD state, muting, and faults  

• Dimensions & Weight: ~112 × 68 × 100 mm, ~550 g

• Certifications: CE, cULus, TÜV; compliant with IEC 61508, ISO 13849-1  

• Mounting: DIN-rail or panel mount via housing slots