Data Acquisition


  • Built-in Web Server
  • Support Modbus TCP/UDP, MQTT, and SNMP V2c Protocols
  • 2-port Ethernet Switch (LAN Bypass) for Daisy-Chain Wiring
  • Dual Watchdog
  • I/O Pair Connection (Push and Pull)
  • Built-in I/O
    • ET-2224/PET-2224: 4-channel AO
    • ET-2228/PET-2228: 8-channel AO


The ET-2224 provides 4 channels analog output. It provides a variety of programmable analog output options (0 to 5 V, +/-5 V, 0 to 10 V, +/-10 V, 4 to 20 mA, or 0 to 20 mA). With 2 Ethernet ports, the ET-2224 allows daisy chain connection which permits flexibility in locating devices, eases installation, and lowers infrastructure costs. It features 4 kV ESD protection, 4 kV EFT protection, 2 kV surge, and 3000 VDC I/O isolation are also provided to enhance noise protection capabilities in industrial environments. The power-on value and safe value of AO are configurable.

ET-2224 module supports MQTT protocol and can act as a message publisher and subscriber. After connecting to the server MQTT Broker, the I/O status of the module can be published in the form of a topic, and can also receive messages from the same subscription topics. In communication, when the ET-2224 module is disconnected from the broker, the module has a reconnection mechanism that can automatically reconnect with the broker. In addition, there is a Keep-Alive Interval mechanism to ensure that the connection with the Broker is always maintained.

The ET-2224 supports the standard SNMP V2c specification. Through this specification, ET-2200 can transmit module information and I/O information to SNMP network management equipment or software (SNMP Network Management Software) to help administrators monitor the status of ET-2200 in real time. If the Trap function is enabled, when the module I/O status changes or reboots, it can send a message to the manager to keep track of the channel status at any time.


Factory, Building and Home Automation Remote Maintenance


 Built-in Web Server Yes


 CPU Module
 CPU 32-bit ARM
 Watchdog Timer Module, Communication (Programmable)


 2-way Isolation Ethernet: 1500 VDC
I/O: 2500 VDC


 EMS Protection
 EFT (IEC 61000-4-4) ±4 kV for Power Line
 ESD (IEC 61000-4-2) ±4 kV Contact for Each Terminal
±8 kV Air for Random Point
 Surge (IEC 61000-4-5) ±2 kV for Power Line


 LED Indicators
 Status Run, Ethernet


 Analog Output
 Channels 4
 Type Voltage, Current
 Range Voltage: 0 to +5 VDC, ±5 VDC, 0 to +10 VDC, ±10 VDC
Current: 0 to 20 mA, 4 to 20 mA
 Resolution 12-bit
 Accuracy ±0.1% of FSR
 Short Circuit Protection Yes
 DA Output Response Time 1 ms per channel
 Programmable Output Slope Voltage: 0.0625 to 512 V/Second
Current: 0.125 to 1024 mA/Second
 Open Wire Detection For 4 to 20 mA only
 Voltage Output Capability 10 V @ 10 mA
 Current Load Resistance 500 Ω
 Individual Channel Configuration Yes
 Power-on Value Programmable
 Safe Value Programmable


 Ports 2 x RJ-45, 10/100 Base-Tx, Switch Ports
 LAN bypass Yes
 Security Password and IP Filter
 Protocol Modbus TCP, Modbus UDP, MQTT, and SNMP V2c


 Reverse Polarity Protection Yes
 Consumption 5 W (max.)
 Powered from Terminal Block +10 to +48 VDC


 Casing Metal
 Dimensions (mm) 33 x 126 x 117 (W x L x H)
 Installation DIN-Rail mounting / Wall mounting (Optional ASO-0015)


 Operating Temperature -25 ~ +75 °C
 Storage Temperature -30 ~ +80 °C
 Humidity 10 to 90% RH, Non-condensing





 ET-2224     CR  Ethernet I/O Module with 2-port Ethernet Switch, 4-ch Analog Outputs (RoHS) 1