Powerful communication module for Sercos III networks


Application Interface optionally per:

  • SDI Modbus RTU interface to the application
  • RS485/ RS232/ UART
  • Protocolscripter
  • Automatic Baud rate recognition
  • Complete function access
  • Dual port RAM interface
  • SSC shift register interface (SPI)
  • Function test during active operation
  • Automatic Baud rate and shift register recognition


Specifications of the SERCOS III Module:

  • Dimensions (LxWxH): 85 x 65 x 12 mm
  • Power supply: 3.3 V
  • LEDs integrated on the circuit board
  • Low power consumption
  • Industrial Ethernet plug as M12, RJ45
  • Parameter adaptation during active operation
  • CDI service interface (config, debug, status)
  • Same pin-out to the application
  • Module 100 % tested and SERCOS-certified
  • Galvanic separation between application and bus up to 1.5 kV
  • Configurable via Modbus RTU or terminal
  • Plug-in connector to the application ERNI SMC with 32 pins

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 SERCOS III Slave discontinued


KUNBUS-COM Sercos III User Manual
KUNBUS-COM Sercos III Certificate
other SERCOS modules: Article Number:
Customized SERCOS III Module --


The KUNBUS-COM SERCOS III communication interface was created based on the development of the KUNBUS-IC family. The interface (Sercos 3) includes optoelectronic couplers, bus drivers, microcontroller s, and memory, but also an SMC plug with 32 pins for control respective the application, as well as plug-in connectors for bus connection.

The easy connection of the COM module Sercos III is made possible with a cable or by plugging onto the control card. Because of the uniform pin-out of all COM modules, they can be replaced easily by other variants (for example PROFINET, EtherCAT, etc.). Thus they assume the function of a SERCOS III option card.