ICP DAS tGW-718-T tiny Modbus/TCP to RTU/ASCII gateway

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ICP DAS’s tGW-718-T is a tiny Modbus/TCP to RTU/ASCII gateway with one-port RS-232/422/485. The 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 designed to ensure the module operates continuously, even in harsh environments. In addition, the tGW-718i-T version adds 3000 VDC isolation and a ±4 kV ESD protection component that diverts the potentially damaging charge away from the sensitive circuit to protect the module and equipment from the sudden and momentary electric current. The device is designed for ultralow power consumption and should therefore reduce the costs associated with increasing fuel and electricity prices, especially when many modules are installed.