OPC UA I/O module that provides 8 digital input channels and 8 digital output channels. It has a built-in two-port Ethernet switch to implement daisy-chain topology. The cabling is much easy and can reduce the total cable and switch cost.


  • Built-in Web Server to Provide the Web User Interface
  • Built-in OPC UA Server and MQTT Client Protocol
  • Support to Execute OPC UA and MQTT Communication Simultaneously
  • Support Logic Function Rule Setting: IF, THEN, ELSE
  • Support RESTful API: Read/Write I/O and Virtual Point via HTTP
  • Support Event Log: Record the I/O Value Change for Easy Device Tracking
  • Built-in I/O Channels (8 x DI and 8 x DO)
  • 2-port Ethernet Switch for Daisy-Chain Topology
  • IEEE 802.3af-compliant Power over Ethernet (PoE)
U-7555M     CR  OPC UA I/O Module with 8-ch DI, 8-ch DO and 2-port Ethernet Switch. (RoHS)