High-reliability bridge for legacy HART instruments to modern Modbus RTU networks.
Streamline complex wiring with multi-port distribution and protocol stability.
Integrated alarm control with seamless analog-to-digital data mapping.
Essential tool for onsite configuration and troubleshooting via USB interface.
Precision 4-20mA signal digitization for distributed control systems (DCS).
Industry-standard protocol conversion with robust electromagnetic interference protection.
Remote data acquisition via cellular networks for geographically dispersed assets.
Ethernet-enable your serial devices for cloud-based monitoring and control.
An Industry White Paper on Connectivity, Efficiency, and Growth
The Modbus protocol remains the "lingua franca" of industrial automation. As of 2024, over 65% of brownfield industrial sites still rely on RS485-based Modbus RTU. The demand for "Wholesale Modbus Interface" solutions is driven by the need to bridge these reliable legacy systems with modern Industrial IoT (IIoT) frameworks. Factories in specialized hubs like Jiaxing are now producing multi-protocol gateways that handle not just Modbus, but also HART, PROFIBUS, and EtherNet/IP.
We are witnessing a shift toward **Edge Computing Gateways**. Modern Modbus interfaces are no longer just "translators"; they are "processors." Trends include:
Localization is key for global suppliers. In North America, the focus is on Modbus-to-Ethernet for data center power monitoring. In the Middle East, high-temperature resistant HART-to-Modbus converters are essential for the oil and gas sector. Chinese factories are leading this surge by offering ODM/OEM services that adapt hardware to specific regional certifications (CE, FCC, RoHS).
Established in 2007, Jiaxing Songmao Electronics Co., Ltd. has evolved from a specialized R&D lab into a global powerhouse for industrial communication products. Our journey is defined by technological breakthroughs in the HART protocol and Modbus data acquisition.
As a leading Wholesale Modbus Interface Factory, we provide more than hardware; we provide the reliability required for mission-critical infrastructure. With over 1,073㎡ of dedicated office and research space, we ensure every converter meets the highest standards of Signal Integrity and MTBF (Mean Time Between Failures).
Navigating the complexity of modern industrial automation
Implementing HART-to-Modbus RTU converters for multi-variable flowmeters. Our SM100 series allows for real-time monitoring of pressure, temperature, and flow via a single RS485 bus, reducing wiring costs by up to 40%.
Utilizing GPRS/4G Data Collectors (SM626H-A) for remote pump station monitoring. Features include low-power consumption modes and automatic data re-transmission after network outages.
Integrating 4-20mA to Modbus converters for CEMS (Continuous Emissions Monitoring Systems). High-precision ADC ensures compliance with strict environmental data reporting standards.
Oil Industry
Heating Industry
Natural Gas Industry
Specialized factories like Songmao provide deep protocol expertise. Unlike general electronics manufacturers, we understand the nuances of the HART timing requirements and the complexities of Modbus register mapping. This ensures higher data reliability and fewer communication timeouts in the field.
The choice depends on your distance and network infrastructure. Modbus RTU (RS485) is ideal for short to medium distances (up to 1200m) in high-noise environments. Modbus TCP is preferred for plant-wide integration over existing Ethernet networks, offering higher speeds and easier integration with SCADA systems.
Yes. Our SM100-M series and 16-channel collectors are specifically designed to poll all four dynamic variables (PV, SV, TV, QV) from HART-compatible transmitters and map them into standard Modbus registers.
Modbus polling is the process where a master device requests data from slaves. Our converters optimize this through "Data Mirroring" or "Caching," where the converter continuously polls the instruments and keeps an updated image in its internal memory, allowing the master SCADA to read the data instantly without waiting for the slow instrument response.
Perfect for high-density sensor arrays requiring Modbus output.
Enterprise-grade collector for large-scale instrument monitoring.
Advanced signal processing for sensitive industrial measurements.
Compact and powerful transmitter for field-level integration.
The standard for cost-effective serial protocol conversion.
8-Channel efficiency for mid-sized industrial clusters.
Dual-interface flexibility for versatile legacy connectivity.
Inbound protocol conversion for controlling HART actuators via Modbus masters.