15-ch Isolated Digital I/O Modbus TCP Module



  • 8-ch DI, 7-ch DO, 2-port Ethernet
  • Daisy chain connection with auto-bypass protection
  • Remote monitoring and control with mobile devices
  • Group configuration capability for multiple module setup
  • Flexible user-defined Modbus address
  • Intelligent control ability by Peer-to-Peer and GCL function
  • Multiple protocol support: Modbus/TCP, TCP/IP, UDP, HTTP, DHCP, SNMP, MQTT
  • Web language support: XML, HTML 5, Java Script



Digital Input
Input Voltage Dry contact: Logic level 0: close to GND Logic level 1: open Wet contact: Logic level 0: 0~0.8 VDC max. Logic level 1: 2~5 VDC
Channels 8
Counter Input 3kHz (32 bit + 1 bit overflow)
Dry Contact Logic 0: Open Logic 1: Closed to DGND
Frequency Input 0.1 ~ 3kHz
Input Impedance 5.2 kW (Wet Contact)
Keep/Discard Counter Value when power off -
Supports Inverted DI Status -
Transition Time 0.2 ms
Wet Contact Logic 0: 0 ~ 3 VDC or 0 ~ -3 VDC Logic 1: 10 ~ 30 VDC or -10 ~ -30 VDC (Dry/Wet Contact decided by Switch)
Digital Output
Channels 7 (Sink Type)
Delay Output High-to-Low and Low-to-High
Normal Output Current 100 mA (per channel)
Output Voltage Range 10 ~ 30 VDC
Pulse Output Up to 5kHz
Humidity (Operating) 20 ~ 95% RH (non-condensing)
Operating Temperature -10 ~ 70°C (14 ~ 158°F)
Storage Humidity 0 ~ 95% RH (non-condensing)
Storage Temperature -20 ~ 80°C (-4 ~ 176°F)
Connector Plug-in 5P/15P screw terminal blocks
Dimensions 110 x 60 x 27 mm
Ethernet 2-port 10/100 Base-TX (for Daisy Chain)
LED Indicators 8 DI + 7 DO
Power Consumption 3 W @ 24 VDC
Power Input 10 - 30 VDC (24 VDC standard)
Protection Built-in TVS/ESD protection Power Reversal protection Over Voltage protection: +/- 35VDC Isolation protection: 2500 VDC
Watchdog Timer System (1.6 seconds), Communication (Programmable)


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.