Redundant Modbus Gateway With Multiple Slave And Multiple Master Devices

Redundant Modbus Gateway With Multiple Slave And Multiple Master DevicesSurface Transport & Logistics



For the Redundant Modbus Gateway (Data Collection from Field IEDs over Modbus TCP/IP and data transmission of the required data to Master over Modbus TCP/IP).

Challenges & Solutions

For each system redundancy Following Challenges & Solutions :

  • Modbus Master/Slave Gateway with Minimum 2 nos. Ethernet RJ45 LAN portsthis is confirmed by us. Our Protocol gateway hardware selection has 2 isolated Ethernet RJ45 10/100Mbps LAN ports (Different MAC addresses and Different IP Addresses). Software/Firmware pre-loaded will have necessary drivers/configuration for Modbus Master and Modbus Slave (TCP/IP) device/system integration (Read & Write Analog & Digital Data from both sides) 


  • Communication with max 9 nos. Modbus TCP/IP Slave Devices each with minimum 15 IO points/registers


  • Response time of max 1 sec for retrieval of data from all the 9 Modbus IEDs simultaneously and ready for transmission to Modbus TCP/IP Master Stations.Software/Firmware pre-loaded on Our Protocol gateway hardware  RSK_PGA is capable of multi-threads (each thread will interface with 1 Modbus Master or Slave device). As per clients specification, there shall be max. 13 threads required (9 threads for integrating 9 Modbus Slave devices and 4 threads for integrating 4 Modbus Master Masters) which are available in the offered solution. There shall be no slowness observed in the offered solution even incase some of the Modbus Master & Slave devices are not connected to the network. The data reception from each Modbus device will be within 1 second.


  • Simultaneous Communication with multiple Modbus TCP/IP master station (minimum 4 nos.)


  • Power Supply – 24 VDC


  • Necessary software/license required for programming Software/firmware with required drivers/configuration will be pre-loaded on RSK_PGA. R S Consultancy providedtraining for device configuration & troubleshooting to client engineers and the same is included in the offered solution.


  • Mounting – Standard DINRAIL


  • Approved System Architecture Extract enclosed above for your validation..Pls confirm.


  • Protocol Gateway (RSK_PGA) Onboard Digital Input and Digital Output availability and status/data transmission to Modbus Master


  • Protocol Gateway (RSK_PGA) Onboard Digital Output automatic operation (OFF to ON and further normalization) in an event of any or all Modbus Slave Communication Failure


how can we help you?

Contact us at the RS Consultancy office or submit a business inquiry online.

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Founder , RS Consultancy

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