MQ-7251M
2- port Ethernet Switch, with 16-ch DI communicable over MQTT protocol
Features
The MQ-7251M is an Ethernet I/O module designed with 2-port Ethernet Switch and has 16-channel DI and is communicable over MQTT protocol. The MQTT protocol allows connectivity with various Industrial Internet of Things (IIoT) applications. The MQ-7251M is designed with a user-friendly, web-based interface that provides users to configure module, access the network connection status and I/O status via a normal web browser on a mobile device or computer.
The MQ-7244Mis equipped with optical isolation for 2500 VDC of transient overvoltage protection but do not provide channel-to-channel isolation. This module is designed to be safely used in applications where hazardous voltages are present.
- 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: 16 Channels
Specifications
I/O Specifications
Digital Input
Channels
16
Contact
Wet
Sink/Source (NPN/PNP)
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
-
Off Voltage Level
-
Effective Distance
-
Digital Output
Channels
8
Type
Isolated Open Collector
Sink/Source (NPN/PNP)
Sink
Max. Load Current
650 mA/channel at 25°C Direct Drive Power Relay Module
Load Voltage
+3.5 VDC~ +50 VDC
Overvoltage Protection
60 VDC
Overload Protection
1.4 A
Short-circuit Protection
Yes
Power-on Value
Yes , Configurable
Safe Value
Yes , Configurable
System Specification
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)
±4 kV for Power Line
Power
Reverse Polarity Protection
Yes
Powered from Terminal Block
12 ~ 48 VDC
Consumption
2.9 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°C ~ +75°C
Storage Temperature
-30 ~ +80°C
Humidity
10 ~ 90% RH, non-condensing