tGW-725(i)-UL-(UTA)、tGW-735(i)-UL-(UTA): Tiny Modbus TCP to Modbus RTU/ASCII Gateway with PoE
New Products
2026-09-14
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Introduction
The tGW-700-UL series is a Modbus TCP to Modbus RTU/ASCII gateway that enables a Modbus TCP host to communicate with serial Modbus RTU/ASCII devices over an Ethernet network, eliminating the cable length limitation of traditional serial communication.
The module can also be used to establish pair-connection applications (such as serial bridge or serial tunnel), allowing Modbus RTU/ASCII devices to exchange data over TCP/IP. This is particularly useful when connecting computers, servers or other Modbus RTU/ASCII serial devices that lack Ethernet capability.
With its space-saving design, the tGW-700-UL series can be directly connected to serial devices or embedded in machines for flexible and convenient installation. It supports both IEEE 802.3af PoE (Class 1) and DC power input and features an ultra-low power design to minimize power consumption. In addition, the module provides 3000 VDC isolation and +/-4 kV ESD protection to help protect equipment against electrical disturbances.
The module is UL certified and complies with stringent safety requirements for fire resistance, protection against electric shock, and durability, helping ensure stable and safe operation in a variety of environments.
The UTA version features a conformal-coated PCB that provides excellent protection against moisture, salt spray, and corrosion, making it particularly suitable for coastal, high-humidity and other harsh environments.
Features
- Supports Modbus TCP/UDP master and slave
- Supports Modbus RTU/ASCII master and slave
- Maximum Modbus TCP master connections per serial port: 32
- Read-cache ensures faster Modbus TCP/UDP responses
- Supports UDP responder for device discovery (UDP Search)
- Supports static IP or DHCP network configuration
- Built-in lightweight Web server for configuration (HTTP)
| Model Comparison Table | ||||||
|---|---|---|---|---|---|---|
| Model (Non-Isolated) | Model (Isolated) | RS-485 | COM1 | COM2 | COM3 | Operating Temperature |
| tGW-725-UL | tGW-725i-UL | 2 | 2-wire RS-485 | 2-wire RS-485 | - | -25 ~ +70 °C |
| tGW-725-UL-UTA | tGW-725i-UL-UTA | 2 | 2-wire RS-485 | 2-wire RS-485 | - | -40 ~ +70 °CC |
| tGW-735-UL | tGW-735i-UL | 3 | 2-wire RS-485 | 2-wire RS-485 | 2-wire RS-485 | -25 ~ +70 °C |
| tGW-735-UL-UTA | tGW-735i-UL-UTA | 3 | 2-wire RS-485 | 2-wire RS-485 | 2-wire RS-485 | -40 ~ +70 °C |
| Note: The UTA version features a conformal-coated PCB that provides protection against humidity, dust, and corrosion, making it particularly suitable for high-humidity and high-salinity environments such as coastal areas, ships, and water treatment facilities. Even when the device is installed inside a waterproof enclosure, the conformal-coated version is still recommended for more comprehensive protection. | ||||||
For more product information, visit:
https://www.icpdas.com/en/product/guide+Serial__Communication+Gateway+tGW__Modbus__Gateway#3273
