MQTT I/O Module with 2-port Ethernet Switch, 8 Digital Inputs (Wet contact) and 8 Digital Outputs (Source). The MQ-7244M, MQ-7252M and MQ-7255M are Ethernet I/O devices equipped with 8-channel DI and 8-channel DO, as well as the MQTT protocol is supported for connecting with a variety of digital sensors in Industrial Internet of Things (IIoT) applications. A web-based user interface is provided to configure module, monitor the network connection ..