IEC 61076-2-105:2008

Overview

IEC 61076-2-105:2008 is an international standard published by the International Electrotechnical Commission (IEC) that establishes detailed product requirements for circular M5 connectors with screw-locking mechanisms. These connectors are primarily designed for electronic equipment used in industrial process measurement and control systems. The standard defines the specifications for fixed, rewiring or non-rewiring connectors, as well as free non-rewiring connectors.

This IEC standard ensures consistent product quality, interoperability, and safety in the use of M5 circular connectors across global industries. It covers mechanical, electrical, and climatic characteristics, as well as test procedures to validate compliance.

Key Topics

• Connector Types and Styles: Specifies fixed connectors (both male and female contacts) and free connectors with non-rewireable designs. Various mounting options including threaded and mounting orientation details are described.

• Dimensions and Interface: Defines precise physical dimensions for connector interface, pin layout, and gauges to ensure compatibility and interchangeability.

• Electrical Properties: Covers rated voltage, impulse voltage, current-carrying capacity, contact resistance, insulation resistance, and voltage proof tests based on pollution degree and environmental conditions.

• Mechanical Properties: Addresses IP protection ratings, insertion and withdrawal forces, vibration resistance, polarizing methods, and mechanical endurance to guarantee robust and reliable connections in industrial environments.

• Climatic and Environmental Conditions: Specifies climatic categories to indicate operating temperature and humidity ranges suitable for the connectors.

• Testing and Compliance: Provides a comprehensive test schedule including preliminary tests, dynamic and climatic tests, mechanical endurance, electrical loading, chemical resistivity, and connection method assessments, ensuring compliance with safety and performance requirements.

• Marking and Ordering: Describes IEC type designations, marking protocols, and ordering information to facilitate product identification and procurement.

Applications

M5 circular connectors defined in IEC 61076-2-105:2008 are widely used in sectors where reliable, compact, and screw-locked circular connectors are critical for sensor, actuator, and instrumentation interfaces in industrial automation, process control, and measurement systems. Key practical applications include:

• Industrial process automation
• Measurement and control instrumentation
• Factory machinery interfaces
• Robotics and motion control systems
• Harsh environment electrical connections requiring reliable locking and sealing

The connectors’ screw-locking mechanism ensures vibration-resistant and secure connections suitable for demanding industrial conditions. Their compact M5 size makes them ideal for space-constrained electronic assemblies.

Related Standards

IEC 61076-2-105:2008 is part of the broader IEC 61076 series covering product requirements for electronic equipment connectors. Related standards include:

• IEC 61076-2-101: Detail specification for M8 connectors with screw-locking
• IEC 61076-2-104: Specifications for M12 connectors widely used in industrial automation
• IEC 61076-1: General product requirements and terminology for connectors
• ISO/IEC Directives Part 2: Framework followed for drafting IEC standards

Consulting these standards alongside IEC 61076-2-105 provides a comprehensive understanding of connector requirements spanning different sizes and locking mechanisms for industrial applications.

Keywords: IEC 61076-2-105, M5 circular connectors, screw-locking connectors, industrial connectors, process control connectors, electronic equipment connectors, IEC standards, connector dimensions, electrical connector requirements, mechanical endurance connectors, IP rated connectors