The ET-2228 provides 8 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-2228 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-2228 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-2228 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-2228 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.

Features

• 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
• 8-channel AO

Applications:

• factory
• building 
• home automation remote maintenance

Specification:

• software: built-in web server
• CPU: 32-bit ARM
• watchdog timer: module, communication (programmable)
• isolation: 2-way isolation, Ethernet: 1500 VDC, I/O: 3000 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: 8
  • 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
  • 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
  • power-on value: programmable
  • safe value: programmable
• Ethernet
  • ports: 2 x RJ-45, 10/100 Base-Tx, Switch Ports
  • LAN bypass
  • security: password and IP filter
  • protocol: Modbus TCP, Modbus UDP, MQTT, and SNMP V2c
• power
  • reverse polarity protection
  • consumption: 6.2 W (max.)
  • powered from terminal block: +10 to +48 VDC
• mechanical
  • casing: metal
  • dimensions (mm): 33 x 126 x 117 (W x L x H)
  • installation: DIN-rail mounting / wall mounting (optional ASO-0015)
• environment
  • operating temperature: -25 to +75 °C
  • storage temperature: -40 to +80 °C
  • humidity: 10 to 90% RH, non-condensing