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Highly efficient isolated RS-485 module for Industry 4.0

Bringing intelligence to the edge of noisy industrial environments the MAXM22511 is a 2.5kV isolated RS-485/RS-422 module transceiver with power from Maxim Integrated Products.

The device has been designed to simplify and shrink field bus communications systems for factory automation, motor control and other industrial internet of things (IoT) applications.

Industrial convergence calls for intelligence at the edge of the automated factory to enable self-diagnostic and autonomous capabilities. In order to actively monitor and communicate real-time health and status information required by these environments, factory subsystems require field bus communications systems that meet stringent size and power efficiency requirements while, at the same time, supporting operations in noisy industrial environments.

The MAXM22511 is the first in a family of isolated communications ICs, that will address these challenges while simplifying field bus communications system designs. The highly integrated module does this by eliminating the need for discrete digital isolators, transceivers, transformers and transformer drivers while also reducing bill of materials (BOM) costs.

The MAXM22511 supports 25Mbps data rates while providing 60 percent DC-DC efficiency and +/-35kV electrostatic discharge protection. The module is available in a land grid array (LGA) package (9.35mm x 11.5mm).

Key Advantages

  • High Integration: the module integrates isolated data and isolated power in a small package. By eliminating the need for four discrete components, it reduces BOM costs and simplifies the design.
  • Power Efficiency: the module provides 60% DC-DC efficiency.
  • Robust Operation: 2.5kVRMS isolation supports reliable communication across the isolation barrier to ensure safe operation of industrial equipment. The module reduces electromagnetic interference (EMI) and its +/-35kV electrostatic discharge protection (human body model, or HBM) is twice the level of the closest competitive solution.

Neil Tyler

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