Data Acquisition

ET-7255

  • Built-in Web Server
  • Web HMI
  • Support for both Modbus TCP and Modbus UDP Protocols
  • Communication Security
  • 2-port Ethernet Switch for Daisy-Chain Topology
  • Dual Watchdog
  • I/O Pair Connection
  • Built-in I/O
    • DI/Counter: 8 Channels
    • DO: 8 Channels

Introduction

The ET-7255 provides 8 Dry/wet contact digital input channels and 8 source-type digital output channels. It features optical isolation for 2500 VDC 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 can drive 650 mA load. The power-on value and safe value of digital output channel are programmable. It can safely be used in applications where hazardous voltages are present.

Application

Building Automation, Factory Automation, Machine Automation, Remote Maintenance, Remote Diagnosis, Testing Equipment.

Specifications

 Software
 Built-in Web Server Yes

 

 CPU Module
 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) ±0.5 kV for Power Line

 

 LED Indicators
 Status Run, Ethernet

 

 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: +10 to +50 VDC
 OFF Voltage Level Dry: Open
Wet: +4 VDC (max.)
 Max. Counts 4,294,967,295 (32-bit)
 Frequency 100 Hz
 Min. Pulse Width 5 ms
 Effective Distance 500m (max.)
 Input Impedance 10 kΩ
 Overvoltage Protection +70 VDC

 

 Digital Output
 Channels 8
 Type Isolated Open Collector
 Sink/Source (NPN/PNP) Source
 Load Voltage +10 to +40 VDC
 Load Current 650 mA/channel at 25°C
 Overvoltage Protection +47 VDC
 Short-circuit Protection Yes
 Power on Value Programmable
 Safe Value Programmable

 

 Ethernet
 Ports 2 x RJ-45, 10/100 Base-TX, Swtich Ports
 LAN bypass Yes
 Security ID, Password and IP Filter
 Protocol Modbus TCP, Modbus UDP

 

 Power
 Reverse Polarity Protection Yes
 Consumption 3.9 W (max.)
 Powered from Terminal Block +12 to +48 VDC

 

 Mechanical
 Dimensions (mm) 76 x 120 x 38 (W x L x H)
 Installation DIN-Rail mounting

 

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

 

Description

 PRODUCT SERIES     DESCRIPTION    QNT   INQUIRY
 ET-7255     CR  Ethernet I/O Module with 2-port Ethernet Switch, 8-ch DI and 8-ch DO (RoHS) 1