EN 2591-705:2001

Overview

EN 2591-705:2001 is a European aerospace standard developed by CEN (European Committee for Standardization) and the European Association of Aerospace Manufacturers (AECMA). It specifies a precise method for measuring the stub input impedance of electrical couplers used in aerospace applications. This measurement is critical for ensuring the performance and reliability of electrical connection elements within aerospace systems.

This standard is part of the broader EN 2591 series that covers test methods for both electrical and optical connection elements. EN 2591-705 is designed to be used in conjunction with EN 2591-100, which covers general test methods applicable across the aerospace connection components.

Key Topics

• Stub Input Impedance Measurement: EN 2591-705 defines the procedure to accurately measure the input impedance of coupler stubs, a vital electrical parameter affecting signal integrity.
• Test Apparatus Setup: The measurement utilizes an impedance meter connected following a defined schematic, ensuring uniformity and repeatability.
• Test Signal Parameters: The test is performed with a sinusoidal signal at 1 MHz frequency and 0.3 V RMS amplitude, optimizing conditions representative of aerospace electrical environments.
• Preparation of Specimens: The standard requires clear documentation of the stub input impedance and test temperature per the technical specification to maintain consistency in testing.
• Compliance Criteria: Measured impedance values must meet the specified limits in the technical specification to ensure component suitability for aerospace applications.

Applications

EN 2591-705:2001 is essential for aerospace manufacturers, suppliers, and testing laboratories involved in:

• Electrical Coupler Quality Assurance: Verifying that couplers meet stringent impedance requirements, which influences signal transmission integrity.
• Aerospace Systems Development: Ensuring electrical connection elements conform to industry standards for optimal system performance.
• Maintenance and Troubleshooting: Facilitating reliable testing methods to evaluate component health and diagnose potential electrical mismatches.
• Research and Development: Providing standardized measurement procedures to support innovation in aerospace electronic connectors.

This standard is particularly relevant in the aerospace sector for components used in avionics, communication devices, and other critical electrical systems where precise impedance matching is vital.

Related Standards

• EN 2591-100: Aerospace series – Test methods – Part 100: General
  Provides the foundational test methodologies referenced and required for use alongside EN 2591-705.

• EN 2591 Series
  Encompasses a comprehensive set of standards for electrical and optical connection elements testing in aerospace applications.

• AECMA Prestandards
  Historical aerospace prestandards from AECMA, the predecessor to CEN standards, often referenced in EN 2591 documentation.

Practical Value

Implementing EN 2591-705 ensures that:

• Aerospace couplers maintain the expected electrical characteristics, reducing errors caused by impedance mismatches.
• Test results are consistent and reproducible across various labs, manufacturers, and countries, supporting interoperability.
• Aerospace equipment meets stringent safety and performance criteria, crucial for mission-critical environments.
• Manufacturers align with regulatory requirements, facilitating market acceptance and certification within the European aerospace industry.

By following EN 2591-705, stakeholders improve the reliability and longevity of electrical connections in aerospace systems, supporting both safety and technological advancement in the sector.

Keywords: EN 2591-705, aerospace standards, stub input impedance, electrical couplers, impedance measurement, aerospace electrical connectors, CEN standards, aerospace testing methods, avionics connectors, aerospace quality assurance.