Product News: tSH-700

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Based on the success of our tGW-700 / tDS-700 compact converters, ICP DAS continues to develop new modules to meet the needs of various applications from worldwide customers. Recently we released the new tSH-700 Tiny Serial Port Sharer, which features Baud Rate conversion function, Modbus RTU / ASCII conversion, and two Master devices access to a single Slave device.

tsh-700 feature

The tSH-700 module also features a built-in Web Server that provides web management interface; the users can easily and quickly set the parameters without memorizing any commands. It is palm-sized, compact space, and is equipped with removable terminal block connector for easy wiring. It automatically controls the direction either to receive or to send via RS-485. The tSH-700 module also provides Power over Ethernet (PoE) function that matches true IEEE 802.3af-compliant (Class 1) standard. It can accept power supply by PoE Switch (eg: NS-205PSE) over the standard Category 5 Ethernet cable or accept power supply via DC adapter. tSH-700 module is designed for low power consumption, it saves energy especially when using a large number of device servers.


  • Baud Rate Conversion
  • Allow a Master device to communicate with Slave devices with different Baud Rate or Data Format. In the Raw Data mode, it can be applied to most of the half-duplex communications that do not require protocol conversion (Request - Response), such as DCON. When the Data Size is less than 512 bytes buffer size (built-in buffer for each serial port), it can perform full-duplex communication.

    tSH-700 feature2

  • Modbus RTU/ASCII Conversion
  • Allow a Modbus RTU/ASCII Master device to communicate with a Modbus RTU/ASCII Slave device with different Protocol, Baud Rate or Data Format.

    tSH-700 feature3

  • Allows Two Master Devices to Access a Slave Device
  • Allows two Master devices to connect to different serial ports and access to the Slave device. Modbus mode can be used to convert Modbus RTU/ASCII protocol, and Raw Data Mode can be used for DCON or other Request - Response protocols. Each serial port can be configured with different Baud Rate or Data Format that depends on connected devices. When two Master devices request the same Modbus information, the built-in Cache function will remove duplicated request message to reduce the load of communication of the Slave device serial port. Note: It may need to set up a longer Timeout for the Upper Computer.

    • Modbus Protocol and Baud Rate Conversion Function

    • tSH-700 feature4

    • Baud Rate Conversion in Raw Data Mode

    • tSH-700 feature5


  • Office Lighting Control Application
  • Connect the two uplink serial ports on the tSH-735 module to the two control panels (Master controller such as TPD/HMI) in the front area as well as the back area of the office. And connect the downlink serial port on the tSH-735 module to the lighting control circuit (RS-485 bus). And then the lighting control of the office can be done by using the Master controller (TPD/HMI) in different locations.

    tSH-700 Office Application

  • Production Line Application
  • In this production line application, the monitoring & control center (HMI/SCADA) is connected to uplink serial ports on the tSH-734 module of the production line 1 and production line 2 via RS-485. And then the on-site Master controller (Panel PC) of the production line 1 and production line 2 are connected to another uplink serial port on the tSH-734 module via RS-232. Furthermore, the downlink serial port on the tSH-734 module is connected to the slave process controller (PAC/PLC) and then each on-site I/O module can be connected to the RS-485 serial port on the slave process controller (PAC/PLC) to achieve monitoring and control of the production process from the Monitoring & control center or from the on-site controllers.

    tSH-700 Application