ICPDAS MQTT I/O Module with 2-port Ethernet Switch, with 8-ch DI and 8-ch DO - MQ-7252M

The MQ-7252M is an Ethernet I/O device 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 status and I/O status, and control digital output channels on the module via a normal web browser on a mobile device or computer. The MQ-7252M features optical isolation for 2500 VDC of transient overvoltage protection, but doesn't provide channel-to-channel isolation. Each output channel can drive up to 650 mA load, together with configurable power-on value and safe value. It can safely be used in applications where hazardous voltages are present.

Features

1. Support for MQTT Protocol
MQTT stands for Message Queuing Telemetry Transport. It is a machine-to-machine (M2M)/"Internet of Things" connectivity protocol with extremely lightweight publish/subscribe messaging transport. It is useful for mobile applications because of its small size, low power usage, minimized data packets, and efficient distribution of information to one or many receivers.

2. Built-in I/O
Various I/O components are mixed with multiple channels in a single I/O module, which provides the most cost effective I/O usage and enhances performance of the I/O operations.

3. Daisy-Chain Ethernet Cabling
The MQ-7200M Series has a built-in two-port Ethernet switch to implement daisy-chain topology. The cabling is much easier and total costs of cable and switch are significantly reduced.

4. LAN Bypass
LAN Bypass feature guarantees the Ethernet communication. It will automatically active to continue the network traffic if any one of the          MQ-7200M looses its power.

5. Dual Watchdog
The Dual Watchdog is consists of a Module Watchdog and a Communication Watchdog. The actions of digital output are also associated to the Dual Watchdog.
Module Watchdog is a built-in hardware circuit to monitor the operation of the module and will reset the CPU if a failure occurs in the hardware or the software. Then the Power-on Value of digital output will be loaded.
Communication Watchdog is a software function to monitor the communication between the MQTT broker and the MQ-7200M.

When the MQ-7200M is disconnected from the MQTT broker for a while, the watchdog forces the digital output to pre-defined Safe Value to prevent unpredictable damage of the connected devices.

6. Highly Reliable Under Harsh Environment
Wide Operating Temperature Range: -25 ~ +75°C
Storage Temperature: -30 ~ +80°C
Humidity 10 ~ 90% RH (Non-condensing)

7. Power-on Value and Safe Value
Power-on value and Safe Value are designed to improve system safety:
Power-on Value: The Power-on Value is loaded into the digital output when the module is powered on or reset by Module Watchdog.
Safe Value: When the Communication Watchdog is enabled and a Communication Watchdog timeout occurs, the “safe value” is loaded into the digital output.

8. LED indicators for DIO status
The LED indicators are used to indicate the status of digital I/O on the      MQ-7200M.

9. Two pair of power input pins
The MQ-7200M has 4 pins as two pairs for power input to ease the wiring.