Product Description

Overview

The HIMA H4135A is a high-integrity safety relay module engineered for integration with HIMA’s HIQuad (H41q/H51q) programmable safety systems. Designed for SIL 3 applications, it provides reliable electrical isolation and safe switching between safety controllers and field actuators, ensuring critical process safety functions are executed under all conditions.

Key Features

High Safety Integrity

• Certified for SIL 3 according to IEC 61508 and Cat.4 / PL e per IEC 62061

• Quad-channel design with diverse internal relay architecture to prevent common-cause failures

• Safe galvanic isolation between input control circuits and output contacts (500 VAC RMS)

Reliable Switching Performance

• Independently monitored relay channels capable of both NO and NC configurations

• Hard gold-plated AgNi contacts for long-term durability in low-signal or higher power switching

• Rapid response with ~8 ms switching time and ~6 ms reset time

• Rated for over 30 million mechanical cycles and 250,000 electrical cycles at rated load

Installation and Physical Attributes

• Compact module: 12.5 mm (W) × 100 mm (H) × 100 mm (D)

• Lightweight: approximately 150 g

• Standard 35 mm DIN rail mounting; supports horizontal or vertical installation

• Wiring up to 2.5 mm² (AWG 14) compatible

Technical Specifications

Applications

The H4135A is ideal for high-integrity safety functions across industries such as oil & gas, petrochemicals, and power generation. Typical uses include:

• Emergency Shutdown (ESD) circuits

• Burner Management Systems (BMS)

• Fire & Gas (F&G) system logic

• Interface between safety PLCs and actuators (valves, motors, alarms)

FAQ

Q: What safety level does H4135A support?
A: It is certified for SIL 3 and PL e applications, suitable for high-integrity safety functions.

Q: Can outputs be configured as Normally Open and Normally Closed?
A: Yes, each relay channel is independently configurable as NO or NC.

Q: What is the maximum operating temperature?
A: The module operates reliably from -20°C to +60°C.

Q: Can the module be installed vertically on a DIN rail?
A: Yes, it supports both horizontal and vertical mounting orientations without extra clearance.