Data Acquisition

ET-2255

  • 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 Wet or Dry contact DI
    • 8-channel Sink-type DO
  • LED Display to Indicate the I/O Status

Introduction

Providing various digital I/O functions, the ET-2255 module is an Ethernet I/O monitoring and control module. The module can be remotely controlled through a 10/100 M Ethernet network by using Modbus TCP/UDP protocol. Modbus has become a de facto standard communications protocol in industry and is now the most commonly available means of connecting industrial electronic devices. This makes the ET-2255 module perfect integration with the HMI, SCADA, PLC, and other software systems.

The ET-2255 provides 8 wet/dry contact digital input channels and 8 sink-type digital output channels. With 2 Ethernet ports, the ET-2255 allows a daisy chain connection which permits flexibility in locating devices, eases installation, and lowers infrastructure costs. It features optical isolation for 3000 Vrms of transient overvoltage protection but doesn’t provide channel-to-channel isolation. Each input channel can be used as a 32-bit counter and each output channel support configurable power-on and safe values. It can safely be used in applications where hazardous voltages are present. It features 8 kV ESD protection, 4 kV EFT protection, 3 kV surge, and 3000 VDC I/O isolation also provided to enrich the noise protection ability for the industrial environment.

The module can be used to create a DI to DO pair-connect through the Ethernet. After configuration, the ET-2255 module can poll the status of the local DI channels and then use the Modbus/TCP protocol to continuously write to the remote DO devices.

It is equipped with a removable terminal block connector for easy and robust wiring in industrial situations and features a powerful 32-bit ARM MCU to handle efficient network trafficking.

ET-2255 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-2255 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-2255 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.

Application

Factory, Building and Home Automation Remote Maintenance

Specifications

 Software
 Built-in Web Server Yes

 

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

 

 Isolation
 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) ±3 kV for Power Line

 

 LED Indicators
 Status Run, Ethernet, I/O

 

 Digital Input/Counter
 Channels 8
 Type Dry Contact
Wet Contact
 Sink/Source (NPN/PNP) Dry: Source
Wet: Sink/Source
 ON Voltage Level Dry: Close to GND
Wet: +5 to +50 VDC
 OFF Voltage Level Dry: Open
Wet: +1 VDC (max.)
 Max. Counts 4,294,967,295 (32-bit)
 Frequency 3 kHz
 Input Impedance 7.5 kΩ
 Overvoltage Protection +70 VDC
 Low Pass Filter 1 to 6500 ms (0.08 Hz to 500 Hz)

 

 Digital Output
 Channels 8
 Type Open Collector
 Sink/Source (NPN/PNP) Sink
 Load Voltage +3.5 to +50 VDC
 Load Current 650 mA/channel
 Overvoltage Protection +60 VDC
 Overload Protection 1.4 A (with short-circuit protection)
 Short-circuit Protection Yes
 Power on Value Programmable
 Safe Value Programmable

 

 Ethernet
 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

 

 Power
 Reverse Polarity Protection Yes
 Consumption 3.5 W (max.)
 Powered from Terminal Block +10 to +30 VDC

 

 Mechanical
 Casing Plastic
 Dimensions (mm) 33 x 126 x 108 (W x L x H)
 Installation DIN-Rail mounting

 

 Environment
 Operating Temperature -25 ~ +75 °C
 Storage Temperature -40 ~ +80 °C
 Humidity 10 to 90% RH, Non-condensing

 

Description

 PRODUCT SERIES     DESCRIPTION    QNT   INQUIRY
 ET-2255     CR  Ethernet I/O Module with 2-port Ethernet Switch, 8-ch DI and 8-ch Sink-type DO (RoHS) 1