Module 16 kênh đầu vào số kết nối 2 cổng Ethernet Modbus TCP/IP ICP DAS ET-2251

Thương hiệu: ICP DAS | Tình trạng: Còn hàng
Liên hệ

ET-2251 CR Ethernet I/O Module with 2-port Ethernet Switch, 16-ch wet contact and dry contact DI (RoHS)

Gọi 0904251826 để được trợ giúp

Module 16 kênh đầu vào số kết nối 2 cổng Ethernet Modbus TCP/IP ICP DAS ET-2251


  • Built-in Web Server
  • Support Modbus TCP/UDP Protocols
  • Powerful 32-bit MCU Handles Efficient Network Traffic
  • 2-port Ethernet Switch (LAN Bypass) for Daisy-Chain Wiring
  • Dual Watchdog
  • I/O Pair Connection (Push and Polling)
  • Supports web configuration and firmware update via Ethernet
  • 16 wet contact & dry contact digital input channels
  • LED Display to Indicate the I/O status
  • Wide Operating Temperature Range: -25 ~ +75 °C


Providing various digital I/O functions, the ET-2251 module is an IP-based 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-2251 module perfect integration with the HMI, SCADA, PLC and other software systems.

The ET-2251 provides 16 wet contact & dry contact Digital Input channels. With 2 Ethernet ports, the ET-2251 allows daisy chain connection which permits the flexibility in locating devices, eases installation and lowers infrastructure costs. It features 8 kV ESD protection, 4 kV EFT protection, 3 kV surge and 3000 VDC I/O isolation are also provided to enhance noise protection capabilities in industrial environments. Each input channel can be used as a 32-bit counter.

The module can be used to create DI to DO pair-connect through the Ethernet. After configuration, the ET-2251 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 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.


  • Factory, Building and Home Automation
  • Remote Maintenance

System Specification

CPU 32-bit ARM
Ethernet Port 2 x RJ-45, 10/100 Base-Tx, Switch Ports
Protocol Modbus TCP, Modbus UDP
Security Password and IP Filter
I/O Pair Connection Yes (Push, Polling)
Dual Watchdog Yes, Module, Communication (Programmable)
LAN Bypass Yes
LED Indicators
For System Running Yes
For Ethernet Link/Ack Yes
For DI/DO status Yes
2-way Isolation
Ethernet 1500 VDC
I/O 3000 VDC
EMS Protection
ESD (IEC 61000-4-2) ±8 kV Contact for Each Terminal and ±16 kV Air for Random Point
EFT (IEC 61000-4-4) ±4 kV for Power Line
Surge (IEC 61000-4-5) ±3 kV for Power Line
Power Requirements
Reverse Polarity Protection Yes
Powered from Terminal Block +10 ~ +30 VDC
Consumption 2.9 W (Max.)
Dimensions (L x W x H) 127 mm x 33 mm x 99 mm
Installation DIN-Rail or Wall mounting
Operating Temperature -25 ~ +75°C
Storage Temperature -30 ~ +80°C
Humidity 10 ~ 90% RH, Non-condensing

I/O Specification

Digital Input/Counter
Channels 16
Contact Wet Contact/Dry Contact
Sink/Source (NPN/PNP) Sink/Source
On Voltage Level +5 VDC ~ +50 VDC
Off Voltage Level +1 VDC Max.
Input Impedance 7.5 kΩ
Counters Max. Count 4,294,967,295 (32 bits)
Max. Input Frequency 3 kHz
Programmable Digital Filter 1 ~ 6500 ms (0.08 Hz ~ 500 Hz)
Overvoltage Protection +70 VDC



Data sheet


Odering information

ET-2251 CR Ethernet I/O Module with 2-port Ethernet Switch, 16-ch wet contact and dry contact DI (RoHS)

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