Thread Content
Detailed Introduction to the Songmao Hart Modem HART-to-USB Modem 1.1 Product Overview The SM100-C is a HART intelligent converter that was developed independently by Jiaxing Songmao Electronics Co., Ltd. in accordance with industrial standards. It is capable of communicating with HART instruments from any manufacturer, such as Rosemount, E+H, Siemens, Kolon, Yokogawa, and Chuanyi. At the same time, its design is integrated, making it easy to install and carry ； It uses a standard USB interface and serial bus for power supply, making it convenient and fast for users to use. Since the SM100-C smart converter is designed specifically for integration into industrial products, it features special designs in terms of temperature range, vibration resistance, electromagnetic compatibility, and interface diversity, ensuring stable operation in harsh environments and providing high-quality performance for your equipment. 1.2 Product Performance ● Supported operating systems: Windows XP, Windows 7, Windows 10. ● Fully compatible with USB V1.1 and USB CDC V1.1 specifications. ● Fully compatible with USB V2.0 and USB CDC V2.0 specifications. ● Powered by USB bus (non-isolated cable), DC 5V, 30mA. ● Standard HART protocol transmission. ● Fully transparent data conversion. ● Compatible with any HART protocol. 1.3 Product Features ● Built-in isolated DC 24V output for powering and communicating with two-wire instruments, minimizing wiring requirements. ● HART signals are transmitted using isolation transformers. ● It features a built-in high-precision 250Ω loop resistor, so no additional resistor is needed for communication testing. ● It comes with a switch to toggle between having WIFI and not having it. ● The panel is equipped with indicator lights, making it easy to see the operating status of the converter. 1.4 Main parameters ● Case dimensions: Length 71 mm × Width 52 mm × Height 22 mm. ● Operating environment temperature: -20°C to +80°C. ● Relative humidity: 10% to 80%. 1.5 Product Selection 1.6 Product Wiring Diagram: ① With built-in 250Ω resistor; ② Without built-in 24V or 250Ω resistors; ③ With built-in 24V and 250Ω resistors. 1.7 Product Application Diagrams: 1) Product Application Diagrams – Wang Yanping, Marketing Department, Jiaxing Songmao Electronics Market, 18757398892, November 25, 2025