Phoenix ELR H5/H51 Series: Enhanced Safety Protection Modules - Selection Guide

Product Overview

The Phoenix ELR H5/H51 Series encompasses high-performance enhanced safety modules designed for short-circuit protection and safety-critical circuit applications in industrial automation. Covering core sub-series (H5-IES-PT, H5-ES-SC, H51-IESSC) with diverse configurations—including control/load voltage compatibility (24V DC/500V AC), current ratings (0.6A~9A), and functional variants (IFS interface, IOL integration, P-suffix specialization)—these modules comply with SIL 3/PL e safety standards. Featuring 35mm DIN rail mounting, robust galvanic isolation, and industrial-grade durability, they’re ideal for safety-critical systems (emergency stops, interlocks), motor protection, and heavy-duty industrial load control in manufacturing, process automation, and hazardous environment-adjacent applications.

Model Quick Reference Table

1. ELR H5-IES-PT Series (Plug-in Terminal Enhanced Safety Modules)

2. ELR H5-ES-SC Series (Short-Circuit Enhanced Safety Modules)

3. ELR H51-IESSC Series (Integrated Enhanced Safety Short-Circuit Modules)

Core Technical Specifications (Universal)

Application Scenarios & Recommended Models

1. Safety-Critical High-Current Control (9A, SIL 3/PL e)

• Requirement: 24V DC-controlled 9A safety circuit for emergency stops
• Recommended Model: 2903906 (ELR H5-IES-PT-24DC/500AC-9)
• Key Reason: SIL 3/PL e compliance; 9A high-current capacity; PT plug-in terminal for fast maintenance

2. IFS System Integration (3A Safety Circuit)

• Requirement: 500V AC 3A safety circuit with IFS interface compatibility
• Recommended Model: 2905139 (ELR H5-IES-PT/500AC-3-IFS)
• Key Reason: IFS interface for seamless system integration; 3A current rating for medium-load safety applications

3. Micro-Current Precision Safety Protection (0.6A)

• Requirement: 24V DC 0.6A safety circuit for sensitive sensors
• Recommended Model: 2903902 (ELR H5-IES-PT-24DC/500AC-0,6)
• Key Reason: 0.6A micro-current rating; PT terminal for tool-free wiring; SIL 3 compliance

4. High-Reliability Short-Circuit Protection (2A)

• Requirement: 24V DC 2A short-circuit safety protection for control circuits
• Recommended Model: 2900559 (ELR H5-ES-SC-24DC/500AC-2)
• Key Reason: SC short-circuit specialization; high-reliability design for critical control systems

5. IOL-Compatible Safety Circuit (9A)

• Requirement: 500V AC 9A safety circuit with IOL integration
• Recommended Model: 2908670 (ELR H5-IES-PT/500AC-9-IOL)
• Key Reason: IOL compatibility for industrial system integration; 9A high-current capacity

Core Advantages

• Safety Compliance: SIL 3/PL e certifications for safety-critical applications
• Dual Terminal Convenience: PT plug-in terminals enable tool-free wiring and fast maintenance
• Wide Current Coverage: 0.6A~9A range fits micro-current to heavy-load safety needs
• Industrial-Grade Reliability: -25℃~70℃ operating temperature, 4kV isolation, and IP20 protection
• Functional Versatility: IFS interface, IOL integration, and P-suffix specialization for tailored system needs
• High-Voltage Compatibility: 500V AC load voltage supports industrial high-voltage circuits
• Fast Response: ≤1ms fault response time minimizes equipment damage and safety risks
• Global Compatibility: CE/UL/CSA certifications enable international deployment

Installation & Usage Notes

• Voltage Matching: Ensure control voltage (24V DC) and load voltage (≤500V AC) align with module ratings
• Current Selection: Choose current rating based on normal operating current (avoid over-sizing to ensure safety protection)
• PT Terminal Wiring: Use 0.14~2.5mm² conductors; PT plug-in terminals enable tool-free installation (no crimping required)
• Safety Wiring: Follow SIL 3/PL e wiring guidelines (separate safety and standard wiring by ≥10mm; ensure proper grounding)
• Interface Compatibility: For IFS/IOL models, verify compatibility with target systems (e.g., IFS network protocols)
• Mounting Spacing: Reserve ≥5mm between modules for heat dissipation, especially for high-current (≥9A) variants
• Environmental Protection: Install in dry, dust-free control cabinets (IP20 protection); avoid moisture or corrosive substance exposure
• Maintenance Checks: Regularly inspect module status indicators (if equipped) and terminal connections; replace modules after fault activation