Dual Ethernet Master Selector for two redundant EtherCAT®, Sercos III, PROFINET®, ... -Masters

Designed to build redundant Ethernet based Master Systems like EtherCAT, Sercos III, PROFINET, ...

  • One network (EtherCAT, Sercos III, PROFINET, ...) with cable redundancy connected to the primary or the secondary master by a simple control signal

  • Ideal to build up a redundancy at the Master side as extension to EtherCAT Technology Group Standard (ETG) or Sercos III Standard

Compatible to Ethernet based Systems

  • Flexible Application range to switch one network between two Masters / PCs for all Ethernet based systems or field bus standards like EtherCAT, Sercos III, Profinet, etc. with 100BASE-TX

Optically isolated Switching Signal

  • The switching signal is optically isolated

  • Characteristic according to DIN EN 61131-2, Type 3

  • DIN-EN carrier rail mounting

  • Ethernet physics according to IEEE 802.3

The product can also be found on the product pages of the related organisations:

EtherCat logo Sercos icon



The ECX-Master-Selector is equipped with a LAN selector switch. Controlled by a simple switching input signal, the ECX-Master-Selector can connect an EtherCAT network to one of two different EtherCAT masters with cable redundancy. The control signal is optically isolated.


The ECX-Master-Selector is designed for DIN-EN carrier rail mounting.
The module provides service-friendly ‘wiring’ of the supply voltage. The power supply can be applied via the In-Rail-bus connector (TBUS-connector) integrated in the mounting rail or separately via the clamp-connection.

Dual EtherCAT Master Switch: ECX-Master-Selector by esd