China Modbus RTU TCP Suppliers & Factory

Empowering Industrial Connectivity with High-Precision HART to Modbus Converters and Industry 4.0 Solutions Since 2007.

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Technological Roadmap

In the era of Industrial IoT, the evolution of Modbus RTU to Modbus TCP represents the bridge between legacy fieldbus stability and modern Ethernet flexibility. Our R&D focus is on Edge Computing Gateways that allow for real-time data filtering, protocol translation (HART to MQTT), and seamless cloud integration. We are moving towards "Zero-Touch Configuration" and AI-driven diagnostic features for industrial protocol converters.

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Global Compliance

Operating in the global market requires strict adherence to international standards. Our products are designed to meet CE, RoHS, and FCC certifications. Furthermore, for hazardous environments, our HART collectors support intrinsic safety considerations. We ensure that our Modbus implementations are strictly compliant with the Modbus Organization specifications, ensuring 100% interoperability with PLC brands like Siemens, Schneider, and ABB.

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China Factory 4.0

Jiaxing Songmao Electronics leverages the Supply Chain Resilience of the Yangtze River Delta. By integrating automated SMT lines and 18+ years of strict quality control, we provide an "Efficiency Advantage" that translates to shorter lead times and higher reliability. Our facility is not just a factory; it is a center of excellence for Analog-to-Digital conversion technology.

18+ Years of Engineering Excellence

Jiaxing Songmao Electronics Co., Ltd., established in 2007, has evolved from a specialized laboratory into a global leader in industrial communication. Our journey is defined by a deep commitment to the HART protocol and Modbus architectures.

With over 1,000 square meters of specialized R&D space and a track record of serving clients in 40+ countries, we bring Expertise and Authoritativeness to every gateway and converter we produce. We don't just sell hardware; we provide the nervous system for your smart factory.

2007 Established
18+ Exp. Years
40+ Countries
Songmao Factory

🏭 Macro Industry Solutions

Solving complex connectivity challenges across diverse sectors.

Oil & Gas Sector

In the oil industry, HART protocol communication is vital for remote monitoring of wellheads and pressure levels. Our 16-channel HART data collectors integrate seamlessly with Modbus TCP networks to provide real-time situational awareness.

Water & Environmental

Precision is key in water treatment. Our 4-20mA to RS485 converters allow for the digitization of flow meters and pH sensors, enabling automated dosing and compliance reporting.

Heating & Natural Gas

Smart thermal networks utilize our SM700 series converters to bridge the gap between serial meters and centralized SCADA systems, optimizing energy distribution efficiency.

Why Choose Modbus RTU vs. TCP for Your Application?

Modbus RTU (Serial RS485)

  • Best for: Short-distance field device connectivity.
  • Advantage: Low cost, simple wiring, extremely stable in high EMI environments.
  • Songmao Edge: Our RTU converters feature enhanced isolation protection to prevent ground loops.

Modbus TCP (Ethernet)

  • Best for: Plant-wide integration and remote access.
  • Advantage: High speed, support for multiple masters, easier integration with IT infrastructure.
  • Songmao Edge: Our TCP gateways support simultaneous connections and high-speed packet processing for low latency.

Note: For advanced users, our SM100-TCP bridges both worlds, allowing legacy HART devices to communicate directly over modern Ethernet backbones.

Frequently Asked Questions

Q: What is the main benefit of a HART to Modbus converter?
A: It allows you to extract digital data (like device diagnostics and multiple variables) from existing 4-20mA loops without disrupting the analog signal, feeding it directly into a PLC via Modbus RTU or TCP.
Q: Does Songmao support customized protocol development?
A: Yes, as a factory with internal R&D, we offer OEM/ODM services for specific industrial communication needs, including custom register mapping and hardware modifications.
Q: How do you ensure product reliability for 24/7 industrial use?
A: Every unit undergoes a 48-hour burn-in test. We use industrial-grade components rated for extended temperature ranges to ensure longevity in harsh environments.
Q: Can your data collectors handle multiple channels simultaneously?
A: Absolutely. We offer 8-channel, 16-channel, and up to 32-channel HART data collectors (like the SM100-M series) for high-density sensor environments.