RS-485 transceivers meet IEC surge standards: Page 2 of 2

November 04, 2016 //By Graham Prophet
RS-485 transceivers meet IEC surge standards
Analog Devices claims a first with its RS-485 transceivers, fully certified for Level 4 EMC surge protection, eliminating the need for external transient-voltage surge-suppression devices.

Specifications include:

  • 5 kV rms isolated RS-485/RS-422 transceiver (ADM2795E)
  • Certified IEC 61000-4-x immunity across isolation barrier (ADM2795E)
  • High common-mode transient immunity: >75 kV/μs (ADM2795E)
  • Certified Level 4 EMC Protection on RS-485 A, B Bus Pins
  • IEC61000-4-5 Surge Protection (±4 kV)
  • IEC61000-4-4 EFT Protection (±2 kV)
  • IEC61000-4-2 ESD protection; ±8 kV Contact Discharge, ±15 kV Air-Gap Discharge
  • IEC61000-4-6 conducted RF immunity (10 V/m rms)
  • RS-485 A, B pins human body model HBM ESD >±30 kV
  • ±42V ac/dc peak Fault Protection on RS-485 bus pins
  • Extended common-mode input range of −25V to +25V
  • TIA/EIA RS-485/RS-422 compliant over full supply range and up to 125°C

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