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Communication module with EIA-232 and EIA-485 interfaces, modu721

EY-CM 721

How energy efficiency is improved

SAUTER EY-modulo 5 technology: modular, fast and universal


  • Part of the SAUTER EY-modulo 5 system family

  • Plug-in element for extending the modu524/525 automation station (AS)

  • One or two COM modules per AS

  • Connection to non-SAUTER systems (PLC, chillers, meters etc.)

  • Connection for point-to-point protocols with EIA-232 interface

  • Connection for field bus protocols based on EIA-485

  • 2-wire EIA-485 (half-duplex)

  • Galvanic isolation up to 300 V

  • Jumper for EIA-485 bus voltage, bus termination and connection for galvanic isolation

  • M-Bus and further integration of third-party products with the AS for integrated control and optimised regulation and the option to use BACnet/IP communication with the management level.

  • Direct labelling on the front

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