PDM-SD-4CC-SD 4-Contact Mechanical Interlock Switch IP67 Stainless Steel Industrial Guard

1. Product Overview

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The Schmersal PDM-SD-4CC-SD is an advanced modular safety mat system engineered for creating pressure-sensitive safety zones around industrial machinery. This system comprises interconnected mat segments featuring a rugged polyurethane surface with embedded sensor technology that detects operator presence. The "4CC" designation indicates four independent contact evaluation channels, while "SD" specifies the integrated self-diagnostic capabilities. Designed for heavy industrial environments, the mat surface resists oils, coolants, and mechanical abrasion while maintaining flexibility across temperatures from -40°C to +80°C. The system connects to Schmersal's safety controllers via M12 connectors, enabling reliable area monitoring without trip hazards. Its modular design allows custom-shaped safety perimeters around complex machinery layouts while providing IP65-rated protection against liquid ingress at connection points.

​2. Key Technical Parameters

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Operating at 24V DC ±20%, this system achieves ISO 13849-1 PL d (Category 3) safety rating with SIL 2 compliance per IEC 62061. Each mat segment features 30mm thickness with 3mm activation travel distance requiring ≥50N force for reliable detection. The four-channel architecture provides redundancy, with each channel rated for 6A @ 24V DC contact capacity. Environmental specifications include IK08 impact resistance and IP65 rating for control units. Mats withstand point loads up to 2,000N without damage and feature anti-slip diamond-pattern surfaces. System diagnostics monitor mat integrity, wire breaks, and short circuits with <100ms fault detection. Maximum coverage per controller reaches 30m² with segment sizes configurable from 0.5m × 0.5m to 1.5m × 1.0m. Operating temperature ranges from -25°C to +70°C.

​3. Primary Applications and Use Cases

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This safety mat system is essential for creating dynamic protection zones around automated equipment. Key implementations include robotic welding cells where operators intermittently enter work envelopes, automated assembly stations requiring manual part loading, and press brake operator positions during tooling adjustments. It's equally critical for palletizing system access points, CNC machine tending areas, and conveyor maintenance stations. The modular design adapts to irregular floor plans around injection molding machines, die-casting equipment, and automated test stations. Additional applications include protecting maintenance access around hydraulic power units, creating safe zones for AGV docking stations, and safeguarding operators at manual workstations within automated production lines. Its oil-resistant surface makes it ideal for automotive machining centers and metalworking facilities.

​4. Product Advantages and Functional Benefits

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The PDM-SD-4CC-SD delivers significant safety and operational advantages. Quad-channel redundancy ensures continued operation even with single-channel failure, reducing nuisance downtime. Integrated self-diagnostics detect mat degradation before safety compromise, enabling predictive maintenance. The modular design allows custom zone configurations without custom tooling, cutting installation time by 50% versus fixed mats. High-density polyurethane construction withstands industrial trucks (1,500 kg wheel load) and chemical exposure, lasting 5× longer than standard mats. Four independent contact sets enable zone-specific machine control (e.g., stopping only affected equipment). Simple clip-lock connectors facilitate rapid mat replacement without rewiring. Compliant with ISO 13856-1 pressure-sensitive mat standards, it provides reliable personnel protection while allowing normal material handling equipment passage when properly configured.

​5. Core Functionality and Safety Operation

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The system operates through distributed pressure sensors within interconnected mat segments. When force ≥50N is applied (operator stepping on mat), internal conductive layers make contact, closing safety circuits. The four independent channels simultaneously signal the connected safety controller (e.g., Schmersal AZM200 series), which validates all four signals before initiating machine stop. Continuous self-monitoring performs:

• Resistance measurement detecting mat delamination
• Short-circuit detection between channels
• Wire-break monitoring at connection points
• Cross-fault analysis between channels
  Faults trigger controller lockout while maintaining safe machine state. Mats remain active during power loss through mechanical contact closure. Reset requires deliberate controller command after fault clearance. The SD diagnostic variant provides detailed error codes via auxiliary outputs for PLC integration. Safety distance calculation per ISO 13855 ensures hazardous motion ceases before operators reach danger zones, with mat placement accounting for machine stopping time.

Packaging & Shipping

Company Information
Xiamen ZhiCheng Automation Technology Co., Ltdit is a leading global supplier of control system components. We specialize in control systems and drives.

With many years of experience in the industrial sector, we consistently deliver the highest quality of spare parts.which make sure that all this jobs are

perfectly.

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