NEW from ELPRO: IoT Connectivity 641M now with MQTT Sparkplug Gateway!

IoT Connectivity 641M 

The 641M-2 has been expanded to now include MQTT SparkplugB gateway software application. The 641M-2 IoT 4G-LTE Connectivity Router enables your devices to access the Internet of Things (IoT) and Industry 4.0.
Integrated with the Modbus gateway, the Sparkplug interface allows protocol conversion from and to internal I/O and external Modbus devices. Combined with the capability to interface with ELPRO I/O expansion modules, provides integrators a powerful and low-cost gateway I/O solution.


  • Cellular 3G/4G/LTE CAT4 router, including Band 28 support
  • Compact industrial metal enclosure with DIN rail mounting for easy integration
  • into machines or electrical cabinets
  • Dual SIM card support
  • 2 Ethernet, RS232 and RS485 Serial, 2 digital Inputs and 2 digital outputs
  • Modbus RTU, DNP3, TCP, MQTT, SparkplugB, FTP support
  • IPSec & OpenVPN Client & Server, L2TP, PPTP
  • GRE, Port Forward, DMZ
  • Internal serial server
  • Wide power supply supporting 9 to 48Vdc input
  • SMS to read or control inputs/outputs, router status/alarm/state
  • LAN Fallback for redundant networks and VRRP
  • Enhanced security for both cyber and data transmission
  • 2 x 10/100M LAN / WAN Ports
  • Antenna diversity for Cellular bands

Further Information can be found at

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