Powerful communication module for Modbus TCP networks


  • Dimensions (LxWxH): 85 x 65 x 12 mm
  • Power supply: 3.3 V
  • ERNI SMC plug-in connector with 32 pins to the application
  • Freely configurable via Modbus RTU/terminal
  • Modules are subject to certification and 100 % tests
  • Galvanic separation of bus and application up to 1.5 kV
  • Same pin-out to the application for all COM variants
  • Low power consumption
  • Parameter changes during operation
  • CDI service interface (config, debug, status)
  • Industrial Ethernet plug as M12, PoF, or RJ45
  • Indication LEDs
  • A Ring Topology option


As required, application interface via:

  • Dual port RAM interface
  • SSC shift register interface (SPI)
  • Automatic Baud rate and shift register recognition
  • Function test possible during operation
  • SDI Modbus RTU interface
  • UART, RS485, RS232
  • Protocolscripter
  • Automatic Baud rate recognition
  • Full access to all functions

Environmental Conditions

  • Operating temperature: 0°C to +60°C
  • Storage temperature: -30°C to +85°C
  • Humidity: 0% to 95%, non-condensing
  • Condensing: not allowed
  • Mechanical shock load: 15G
  • Permanent mechanical stress: 5G
Legacy product. No longer available.
Article: Article Number:
KUNBUS-COM Modbus TCP Slave discontinued



Thi KUNBUS-COM communication interfaces were created on the basis of the KUNBUS-IC family. This Modbus TCP variant is provided with high-quality plug-in connectors for the bus connection, an SMC plug with 32 pins to the application or the control, the optoelectronic couplers, memory, bus drivers, and the micro controller.

Your control becomes Modbus TCP enabled simply by plugging-in the control card or via a cable. Because of the uniform pin-out of all COM modules, they can be replaced easily by other variants (for example PROFINET, EtherCAT, etc.).