Tiny Serial Port Sharer
Copyright © 2018 ICP DAS CO., Ltd. All Rights Reserved.
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1.
Introduction
Following the success of the original tGW-700/tDS-700 modules, ICP DAS has continued to develop
new functions for these products in order to provide increased support for a greater number of
applications. The tSH-700 module is a serial port sharer that provides a number of functions,
including "Baud Rate Conversion", "Modbus RTU/ASCII Conversion" and "Two Masters Share One
Slave". The built-in web server provides easy configuration interface, and no console commands are
required.
The tSH-700i module also adds 3000 V
DC
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.
Baud Rate Conversion:
This function allows a single master device to communicate with slave
devices using different baud rates and data formats. Most query-response protocols (half-
duplex), e.g. DCON, are supported in the raw data mode. Full-duplex communication should
also work when the data size is smaller than the built-in 512 bytes buffer on each serial port.
Modbus RTU/ASCII Conversion:
This function allows a single Modbus RTU/ASCII master device
to communicate with Modbus RTU/ASCII slave devices using different protocols, baud rates
and data formats.
