8DI/7DO IoT Modbus/SNMP/MQTT 2Ports Ethernet Remote I/O Module



  • 8ch digital input(counter)/7ch digital output(pulse output)
  • Protocols:MQTT(TLS),SNMP,Modbus TCP,RESTful,ASCII
  • GCL to perform basic logic control rules
  • Cloud access: Data update to Azure
  • Auto-bypass function to ensure daisy-chain data transmission
  • Peer-to-Peer function to map I/O status
  • Built-in web server
  • Watchdog timer to recover the system



Model ADAM-6250-B
Interface Ethernet
Isolation Voltage 2,500 VDC
Operating Temperature -40~70 °C (-40~158 °F)
Connectors 2 x RJ45, 1 x 15-pin plug-in screw terminal, 1 x 5-pin plug-in screw terminal
Protocol Modbus/TCP, TCP/IP, UDP, HTTP, DHCP, MQTT, SNMP, ASCII command
Isolated Digital Input
Channels 8
Input Voltage Dry Contact
Logic level 1: close to GND
Logic level 0: open
Wet Contact
Logic level 1: 10~30 VDC and -10~-30 VDC
Logic level 0: -3~3 VDC
Isolated Digital Output
Channels 7
Output Type Sink
Output Voltage 10~30 VDC
Sink Current 100 mA max./channel
Power Requirements
Input Voltage 10~30 VDC


Application: Factory Automation Solution for Existing Machine Equipments

The customer wanted to monitor the machines’ operating status. However, most old machines do not have communication ports, and for those that do, it is difficult to obtain the communication protocols from suppliers. Therefore, various sensors were installed in the machines for signal acquisition, with the AD-ADAM-6250 utilized to obtain the status of the machines (e.g., running, shut down, idle, breakdown) and stack lights.

AD-ADAM-6250 modules were installed on each machine. A daisy chain configuration was adopted to connect neighbouring modules in order to minimize on-site wiring. Collected data were then aggregated on a local AD-UNO-2184G automation computer. Because the workshop was far from the control centre, an AD-EKI-2525 switch was adopted to forward the data to the control room.

The machines’ operating status can then be collated into reports in order to view the efficiency of on-site equipment. The system has an alarm mechanism and fault button so that the health of the equipment can be monitored; this has facilitated timely repair and maintenance planning, thus improving the equipment life span, reducing the number of equipment failures, and saving more than 20% on hardware costs.