Data Acquisition
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.
Factory, Building and Home Automation Remote Maintenance
Software | |
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Built-in Web Server | Yes |
CPU Module | |
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CPU | 32-bit ARM |
Watchdog Timer | Module, Communication (Programmable) |
Isolation | |
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2-way Isolation | Ethernet: 1500 VDC I/O: 2500 VDC |
EMS Protection | |
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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 | |
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Status | Run, Ethernet, I/O |
Digital Input/Counter | |
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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 | |
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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 | |
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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 | |
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Reverse Polarity Protection | Yes |
Consumption | 3.5 W (max.) |
Powered from Terminal Block | +10 to +30 VDC |
Mechanical | |
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Casing | Plastic |
Dimensions (mm) | 33 x 126 x 108 (W x L x H) |
Installation | DIN-Rail mounting |
Environment | |
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Operating Temperature | -25 ~ +75 °C |
Storage Temperature | -40 ~ +80 °C |
Humidity | 10 to 90% RH, Non-condensing |
PRODUCT SERIES | DESCRIPTION | QNT | INQUIRY |
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ET-2255 CR | Ethernet I/O Module with 2-port Ethernet Switch, 8-ch DI and 8-ch Sink-type DO (RoHS) | 1 |