SY DDN-RJ45 series products can realize the input and output of collected switching signals to control remote equipment.SY DDN-RJ45 series products can be applied in Ethernet industrial automation control system, monitoring and control, as well as industrial field signal isolation and long-wire transmission and so on.

    The products include power isolation, input and output signal isolation, and Ethernet communication. The communication method adopts Modbus TCP of Ethernet, its instruction set is compatible with ADAM module, the configuration parameters can be set by the user, and it can be hooked on the same bus with other manufacturers' control modules, which is convenient for computer programming.

     SY DDN-RJ45 series products are intelligent monitoring and control system based on microcontroller, all user-set configuration information such as IP address, port number and status are stored in non-volatile memory EEPROM.  

      SY DDN-RJ45 series products are designed and manufactured according to industrial standards, signal input/output isolation, can withstand 3000VDC isolation voltage, strong anti-interference ability, high reliability. Operating temperature range - 25℃～+70℃.

SY DDN-RJ45 Function Introduction  

SY DDN-RJ45 Relay Output and Isolated Digital Input Module can be used to measure the status of six switches and control six relay outputs, supporting Ethernet Modbus TCP protocol.

Modbus TCP Communication Protocol 

        The Modbus TCP protocol is an alternative version of the MODBUS protocol that was developed in 1999 to allow Internet users to access Ethernet devices. Modbus TCP is now the world's leading industrial Ethernet protocol due to the openness and familiarity of the protocol and the simplicity of its application, which is not driven by any commercial interests. The protocol defines a structure of messages that a controller can recognize and use, regardless of the network over which they are communicating. It describes the process by which the controller requests access to other devices, if it responds to requests from other devices, and how errors are detected and logged. It establishes a common format for message field patterns and content.

When communicating on a Modbus network, this protocol dictates that each controller must know the address of their device, recognize messages sent by address, and decide what action to generate. If a response is required, the controller will generate a feedback message and send it out using the Modbus protocol. On other networks, messages containing the Modbus protocol are converted to the frame or packet structure used on that network. This conversion also extends the method of resolving section addresses, routing paths and error detection according to the specific network.