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RS656-Z22 - Dual-Channel Redundant E-Stop - SIL3 Metal IP67 Industrial Safety Relay
| MOQ: | 1 |
| Price: | USD 100-10000/Piece |
| Standard Packaging: | 50*50*50mm |
| Delivery Period: | 3-7 |
| Payment Method: | T/T |
| Supply Capacity: | 1/piece in stock |
1. Product Overview
The Schmersal RS656-Z22 is a heavy-duty position safety switch engineered for industrial guarding applications demanding high mechanical reliability. Featuring a zinc alloy die-cast housing (IP67/IP69K), this device incorporates a four-way adjustable roller lever actuator (Z22) designed to withstand impact forces up to 50J (IK10). Certified to ISO 13849-1 PL e (Category 4), it utilizes force-guided positively driven contacts with dual-channel monitoring for safety circuits up to SIL 3. The robust construction operates continuously from -40°C to +85°C while resisting pressures up to 100 bar during washdown. An integrated inspection window enables visual verification of contact positions without disassembly. Designed with ±3mm lateral tolerance and 8mm overtravel protection, this switch ensures reliable performance in high-vibration environments like stamping presses and material handling systems.
2. Key Technical Parameters
- Safety Ratings:
- PL e (ISO 13849-1 Cat. 4)
- SIL 3 (IEC 62061, PFHD: 4.1×10⁻⁹/h)
- EN 60947-5-1 Annex K compliant
- Electrical:
- Voltage: 24-240V AC/DC
- Contacts: 4NC + 4NO (2 independent channels)
- Current: 10A AC-15 / 4A DC-13
- Mechanical:
- Actuator Travel: 20mm
- Operating Force: 8N ±10%
- Roller Diameter: 28mm stainless steel
- Environmental:
- IP69K (IEC 60529)
- Salt Spray Resistance: 500hrs (ISO 9227)
- Connection:
- Dual M20 cable entries
- Terminal Capacity: 8×2.5mm²
- Certifications:
- UL 508, CSA C22.2 No. 14
- ATEX/IECEx Zone 21/22
3. Primary Applications
This switch is essential for safeguarding heavy machinery:
- Press Brakes: Tooling area guard monitoring
- Stamping Presses: Light curtain bypass verification
- Robotic Welding Cells: Perimeter gate position confirmation
- Forging Hammers: Die access safety interlocks
- Steel Slitting Lines: Coil handling guard systems
- Die Casting Machines: Molten metal splash protection
- Paper Converting: Rotary cutter guarding
- Automotive Transfer Lines: Pallet conveyor safety gates
Its IP69K-rated construction and chemical-resistant Viton® seals make it suitable for food processing plants with high-pressure sanitation cycles, while zinc housing withstands impacts in foundries.
4. Functional Advantages
- Adjustable Actuation:
- 180° lever rotation with click-stop positioning
- Field-reversible contact blocks
- Safety Redundancy:
- Dual isolated contact circuits
- Cross-monitored channel diagnostics
- High Misalignment Tolerance:
- ±3mm lateral compensation
- 15° angular deviation acceptance
- Maintenance Features:
- Tool-free contact cartridge replacement
- Hermetically sealed inspection window
- Durability Enhancements:
- Tungsten-carbide roller axle
- IGUS® polymer bearings (lubrication-free)
- Electrical Protection:
- Gold-plated bifurcated contacts
- Surge protection (2.5kV/EN 61000-4-5)
- Compliance:
- Pre-validated for EN ISO 14119
- EHEDG Type EL-A1 option
5. Safety Operation & Construction
Mechanical Sequence:
- Guard Closure:
- Roller lever depressed → mechanical linkage rotates cam
- NC contacts close with ≥20N force
- Positive Break Assurance:
- Lever release forces contact separation ≥1mm
- Independent springs ensure position
- Diagnostic Monitoring:
- Auxiliary NO contact signals lever position
- Safety controllers verify contact synchronization
Construction Details:
- Housing: ZnAl4Cu1 die-casting with chromate passivation
- Seals: Triple-lip Viton® (87° Shore A)
- Contacts:
- AgNi (90/10) with dual breakpoints
- Self-cleaning wiping action
- Lever System:
- AISI 316L stainless steel roller
- Torsion spring pre-tensioning
Fault Detection:
- Channel Discrepancy: >3ms timing difference triggers shutdown
- Contact Welding: Prevents opposing contact operation
- Spring Failure: Opens all NC contacts via mechanical linkage
| Parameter/Attribute | Specification/Description |
|---|---|
| Product Type | Heavy-Duty Safety Limit Switch with Positive Opening Mechanism |
| Model Number | RS656-Z22 |
| Safety Standards | ISO 13849-1, IEC 62061, EN/IEC 60947-5-1 |
| Safety Level | PL e (ISO 13849-1), SIL 3 (IEC 62061), Category 4 |
| IP Rating | IP69K (Protected against high-pressure/steam-jet cleaning and dust ingress) |
| Electrical Rating | AC-15: 250V, 10A DC-13: 24V, 6A |
| Contact Configuration | 2 NC (Normally Closed) Forced-guided contacts (EN 60947-5-1 compliant) |
| Actuator Type | Roller Lever Arm (Stainless Steel) (Z22 suffix = roller lever variant) |
| Mechanical Life | ≥ 2,500,000 cycles (no load) |
| Electrical Life | ≥ 150,000 cycles (rated load) |
| Housing Material | Stainless Steel (V4A/AISI 316L) (Corrosion-resistant for harsh environments) |
| Contact Material | Silver alloy with gold plating (low-energy circuit compatible) |
| Reset Type | Automatic reset (Self-reengaging upon actuator release) |
| Terminal Type | Screw terminals (max. 2.5 mm²) + M12 connector option (5-pin) |
| Operating Force | ≤ 40 N (at roller) |
| Operating Travel | Pretravel: 6–8 mm Contact opening: ≥10 mm |
| Ambient Temperature Range | -40°C to +85°C (operation/storage) |
| Shock/Vibration Resistance | Shock: 100g (6ms) Vibration: 10–500 Hz, 5g amplitude |
| Connection | Dual options: • Cable gland (PG9/M16) • M12 × 1 connector (A-coded) |
| Mounting | 2 × M5 threaded holes (25 mm spacing) + reinforced mounting plate |
| Chemical Resistance | Resists alkalis, acids, oils, and cleaning agents (per EN 60654-1) |
| Approvals | CE, UL Listed, cULus, TÜV, EAC, IECEx, ATEX (Zone 22) |
| Typical Applications | Food processing, chemical plants, offshore equipment, high-pressure washdown areas |
Packaging & Shipping
Company Information
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