HIMA 4135A

HIMA 4135A Safety Relay Module

1. Product Description

• Signal Amplification: Converts low-power control signals into high-current outputs to drive relays, solenoids, or contactors.
• Safety Logic Execution: Supports both normally open (NO) and normally closed (NC) contact configurations to match diverse safety logic requirements.
• Real-Time Diagnostics: Built-in LED indicators and self-test features monitor channel status, enabling quick fault detection and reducing downtime.

2. Technical Parameters

Parameter	Specification
Brand	HIMA
Model	4135A
Module Type	Safety-Related Relay Module (Quad-Channel)
Input Voltage	24 V DC ±10%
Input Current	50 mA (per channel)
Output Switching Capacity	5 A (resistive load), 3 A (inductive load)
Contact Type	Form C (changeover)
Safety Integrity Level	SIL 3 (IEC 61508 compliant)
Operating Temperature	-20°C to +60°C
Storage Temperature	-40°C to +85°C
Dimensions (W×H×D)	12.5 mm × 100 mm × 110 mm
Mounting	DIN rail (EN 60715)
Redundancy Support	Hot-swappable in 1oo4D or 2oo4D configurations
Certifications	CE, UL, cUL, TÜV (SIL 3)

HIMA 4135A

3. Advantages and Features

• Quad-Channel Redundancy:
  The 4135A features four independent relay channels with 1oo4D architecture (one-out-of-four with diagnostics), achieving a mean time between failures (MTBF) of over 150,000 hours. This design ensures continuous operation even if one channel fails, reducing the risk of unplanned downtime by 40% compared to non-redundant solutions.
• SIL 3 Compliance:
  Certified to the highest safety integrity level, the module is suitable for applications requiring strict compliance with IEC 61508, making it ideal for safety-critical systems in industries such as oil and gas or chemical processing.
• Galvanic Isolation:
  Electrical isolation between input and output circuits protects against transient voltage spikes and EMI, ensuring signal integrity in noisy industrial environments.
• Compact Design:
  At just 12.5 mm width, the 4135A maximizes space efficiency in control cabinets, allowing dense installations without compromising performance.

4. Application Areas and Case Study

Application Areas:

• Oil & Gas: Emergency shutdown systems (ESD), wellhead control, and pipeline safety interlocks.
• Chemical Processing: Reactor protection, hazardous material handling, and batch process control.
• Power Generation: Turbine overspeed protection, generator safety controls, and switchgear interlocks.
• Manufacturing: Machine safety guards, robotic control, and automated production lines.

Case Study:

5. Competitive Comparison

• Higher Safety Integrity: SIL 3 certification supports the most critical safety applications, surpassing modules with lower SIL ratings.
• Enhanced Redundancy: Quad-channel architecture offers superior fault tolerance compared to dual-channel alternatives, reducing single-point failure risks.
• Space Efficiency: Compact design allows up to 32 channels in a 400 mm control cabinet, 20% more than bulkier competitors.
• Global Compliance: Certifications like UL and cUL ensure suitability for installations worldwide, avoiding regional compatibility issues.
  

  HIMA 4135A

6. Selection Recommendations

• Safety Requirements: Verify that the 4135A’s SIL 3 rating matches your application’s risk assessment, especially for processes where failure could lead to environmental or safety hazards.
• Signal Needs: Confirm the module’s output current (5 A resistive, 3 A inductive) and contact type (Form C) align with your field devices (e.g., solenoids, contactors).
• Environmental Conditions: Use the 4135A in environments with temperatures between -20°C and +60°C; for extreme conditions, consider additional thermal management.
• System Integration: Ensure compatibility with your safety controller (e.g., HIMA HIQuad series) and existing control panel layout, leveraging its DIN rail mounting for easy installation.

7. Precautions

• Installation:
  • Route signal cables separately from high-voltage power cables to minimize EMI.
  • Torque terminal screws to 1.2 N·m to prevent loose connections.
• Safety Compliance:
  • Follow IEC 61511 guidelines for safety system design, ensuring the module is part of a properly validated SIS.
• Maintenance:
  • Inspect LED indicators monthly to confirm channel status; replace faulty modules during scheduled outages using hot-swap procedures.
  • Clean contacts annually with a dry cloth to remove dust and ensure reliable switching.
• Power Supply:
  • Use a regulated 24 V DC power source within ±10% tolerance to avoid voltage fluctuations that could affect relay performance.