1-Port Modbus RTU/ASCII Gateway R-KEY-LT

R-KEY-LT is a compact and reliable Modbus gateway that converts from Modbus TCP-IP protocol to Modbus RTU / ASCII and vice versa.

It supports up to 8 TCP-IP Modbus clients simultaneously and 10 Modbus TCP-IP servers.

Through this model, serial Modbus slave devices can be integrated into an existing TCP-IP Modbus network as well as Modbus TCP-IP slave devices can be made accessible to serial master.

R-KEY-LT can be configured through web server and software tools.

The module has Vac / dc power on the same hardware, 1,5 kVac isolation, extended temperature range. The device can be powered also by a 230 Vac power supply unit.


  • Gateway Operating Mode: from ModBus TCP-IP to Modbus RTU / ASCII; from Modbus RTU / ASCII to Modbus TCP-IP
  • Traffic monitoring on Web Server
  • Nr.1 Fast Ethernet port 10/100 Tx, front connector RJ45
  • Max 8 Client ModBUS TCP
  • Up to 10 ModBUS TCP Servers
  • Nr. 1 serial port RS232 / RS485, baud rate max 115 kbps
  • Flexible programming via web server or software tools
  • Operating temperature: -20  to  + 70 ° C
  • DIN rail or wall mounting
Power supply 10-40 Vdc; 19-28 Vac
Max. Power consumption 1 W
Isolation 1-5 kVac
Operating temperature -20 to+70°C
Protection degree   IP20


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