MQ-7255M CR ICP DAS MQTT

• Built-in Web Server
• Web HMI
• Support for MQTT Protocol
• 2-port Ethernet Switch for Daisy-Chain Topology
• Dual Watchdog
• Wide Operating Temperature Range: -25 ~ +75°C
• Built-in I/O
  •               DI: 8 Channels
  •               DO: 8 Channels

Introduction

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 status and I/O status, and control DO lines on the module via a normal web browser on a mobile device or computer.
 
The MQ-7244M, MQ-7252M and MQ-7255M feature optical isolation for 2500 VDC of transient overvoltage protection but do not provide channel-to-channel isolation. Each output channel can drive up to 650 mA load, together with configurable power-on value and safe value. The MQ-7200M module can safely be used in applications where hazardous voltages are present.

I/O Specifications

Digital Input
Channels: 8
Contact: Dry, Wet
Sink/Source (NPN/PNP): Dry: Source
                                                Wet: Sink, Source
 
Wet Contact: On Voltage Level: +10 VDC ~ +50 VDC
                Off Voltage Level: +4 VDC Max.
 
Input Impedance: 10 kΩ
Overvoltage Protection: +70 VDC
 

Dry Contact: On Voltage Level: Close to GND
                        Off Voltage Level: Open
 
Effective Distance: 500 M Max.

 
Digital Output
Channels: 8
Type: Isolated Open Collector
Sink/Source (NPN/PNP): Source
Max. Load Current: 650 mA/channel at 25°C
Load Voltage: +10 VDC~ +40 VDC
Overvoltage Protection: 47 VDC
Short-circuit Protection: Yes
Power-on Value: Yes , Configurable
Safe Value: Yes , Configurable

system specifications

Software
Built-in Web Server: Yes
Web HMI: Yes
 
Communication
Ethernet Port: 2 x RJ-45, 10/100 Base-TX, Switch Ports
Protocol: MQTT 3.1.1
Dual Watchdog: Yes, Module (0.8 seconds), Communication (Configurable)
PoE: -
 
LED Indicators
for System Running: Yes
for Ethernet Link/Act: Yes
for DI/DO Status: Yes
 
2-Way Isolation
Ethernet: 1500 VDC
I/O: 2500 VDC
 
EMS Protection
ESD (IEC 61000-4-2): ±4 kV Contact for Each Terminal and ±8 kV Air for Random Point
EFT (IEC 61000-4-4): ±2 kV for Power Line
Surge (IEC 61000-4-5): ±2 kV for Power Line
 
Power
Reverse Polarity Protection: Yes
Powered from Terminal Block: 12 ~ 48 VDC
Consumption: 3.9 W Max.
 
Mechanical
Dimensions (L x W x H): 120 mm x 97 mm x 42 mm
Housing: Metal
Installation: Wall Mounting
 
Environmental
Operating Temperature: -25 ~ +75°C
Storage Temperature: -30 ~ +80°C
Humidity: 10 ~ 90% RH, non-condensing