GW-2225i Isolated Modbus TCP to Modbus RTU/ASCII gateway, dual ethernet (2xRS485/RS422)

Description

The GW-2200 is a Modbus TCP to RTU/ASCII gateway that enables a Modbus/TCP host to communicate with serial Modbus RTU/ASCII devices through an Ethernet network, and eliminates the cable length limitation of legacy serial communication devices. The module can be used to create a pair-connection application (as well as serial-bridge or serial-tunnel application), and can then route data over TCP/IP between two serial Modbus RTU/ASCII devices, which is useful when connecting mainframe computers, servers or other serial devices that use Modbus RTU/ASCII protocols and do not themselves have Ethernet capability.
 
The read-cache function is used to store previous requests and responses in the memory buffer of the GW-2200 module. When other HMI/SCADA master controllers send the same requests to the same RTU slave device, the cached response is returned immediately. This feature dramatically reduces the loading on the RS-485 bus communication, ensures faster TCP responses, and improves the stability of the entire system.
 
The GW-2200 module features a powerful 32-bit MCU to enable efficient handling of network traffic, and also has a built-in web server that provides an intuitive web management interface that allows users to modify the configuration of the module, including the DHCP/Static IP, the gateway/mask settings and the serial port settings.
 
The module contains a dual watchdog, including a CPU watchdog (for hardware functions) and a host watchdog (for software functions). The CPU watchdog automatically resets the CPU if the built-in firmware is operating abnormally, while the host watchdog automatically resets the CPU if there is no communication between the module and the host (PC or PLC) for a predefined period of time (system timeout). The dual watchdog is an important feature that ensures the module operates continuously, even in harsh environments. In addition, the GW-2200 series (for i version) also adds 3000 VDC isolation and +/-4 kV ESD protection component that diverts the potentially damaging charge away from sensitive circuit to protects the module and equipment from the sudden and momentary electric current.
 
With 2 Ethernet ports, the GW-2200 allows daisy chain connection which permits the flexibility in locating devices, eases installation and lowers infrastructure costs. The GW-2200 module offers true IEEE 802.3af-compliant (classification, Class 1) Power over Ethernet (PoE) functionality using a standard category 5 Ethernet cable to receive power from a PoE switch such as the NS-205PSE. If there is no PoE switch on site, the module will also accept power input from a DC Terminal Block.

Features

• Supports Modbus TCP/UDP master and slave
• Supports Modbus RTU/ASCII master and slave
• Max. TCP connections (masters) per serial port: 32
• Read-cache ensures faster Modbus TCP/UDP response
• Supports UDP responder for device discovery (UDP Search)
• Static IP or DHCP network configuration
• Easy firmware update via the Ethernet (BOOTP, TFTP)
• Built-in Web Server (HTTP)
• 2-port Ethernet Switch (LAN Bypass) for Daisy-Chain Wiring
• Includes redundant power inputs: PoE (IEEE 802.3af, Class 1) and DC supply

Specifications

Technical

GW-2200i Series Modbus TCP to RTU/ASCII Gateway datasheet

Applications

Factory, Building and Home Automation Remote Diagnosis and Management Solar Monitoring