High-reliability data collectors, HART to Modbus converters, and serial RS485/232 network switches engineered by Jiaxing Songmao Electronics Co., Ltd. for industrial automation systems.
In modern industrial automation, field device communication relies heavily on robust data switches, protocol gateways, and intelligent data collectors. As global industries accelerate their transition toward Industry 4.0 and Smart Manufacturing, China has solidified its position as the premier manufacturing hub for advanced industrial communication hardware. When procurement directors and systems integrators search for "China Switch Factories & Factory", their search intent extends beyond basic hardware suppliers—they require engineering-grade protocol conversion, high-density data collection, electromagnetic immunity, and proven long-term reliability.
The industrial communication hardware landscape has shifted from standalone signal splitters to multi-protocol edge switches capable of seamlessly bridging legacy fieldbus networks with high-speed Ethernet and cloud infrastructures. Modern OEM/ODM factories in China now manufacture sophisticated industrial switches, HART multiplexers, Modbus TCP gateways, and 4G/GPRS telemetry terminals that withstand harsh operating environments in petrochemical plants, municipal water networks, heating distribution grids, and automated processing lines.
International buyers seek industrial-grade durability, certified ESD protection, surge resistance, broad operating temperature tolerances (-40°C to +85°C), and full compliance with international standards such as CE, RoHS, and explosion-proof field certifications.
Seamlessly connecting HART smart transmitters (4-20mA loop signals) to Modbus RTU/TCP networks, SCADA systems, PLCs, and cloud servers via cellular GPRS/4G or fast Ethernet infrastructure without data loss.
Chinese direct-factory manufacturing delivers high-tier hardware componentry—isolated power supplies, ARM processor cores, hardware watchdog circuits—at optimized price-to-performance ratios for global OEMs.
SONGMAO Electronic Co., Ltd. (Jiaxing Songmao Electronics Co., Ltd.) was established in 2007. Driven by continuous technological innovation, we have deeply engaged in the field of industrial automation for nearly two decades, evolving into a recognized high-tech enterprise integrating R&D, production, and global sales.
Our core technical focus centers on independent research and development of HART protocol communication products, industrial switches, multi-channel data collectors, and Modbus protocol gateways. Through continuous engineering breakthroughs and rigorous quality management, we have established a trusted leading position across domestic and international markets.
Jiaxing Songmao Electronics Co., Ltd. Factory R&D & Manufacturing Center
Explore Songmao's core product series engineered for seamless industrial device connectivity and data aggregation.
Comparing high-density protocol switching and signal conversion parameters across Songmao's core industrial series:
| Model Series | Primary Interface | Supported Protocols | Data Channels | Isolation & Surge Rating | Key Application |
|---|---|---|---|---|---|
| SM700-T-1 Series | RS485 / RS232 / RJ45 Ethernet | Modbus RTU, Modbus TCP, Transparent TCP | Single / Dual Serial Port Switch | 1500V DC Galvanic Isolation | Factory Automation Ethernet Bridging |
| SM100-M Series | HART Loop, RS485, RJ45 | HART, Modbus RTU, Modbus TCP | 8 / 16 / 32 Channel HART Multiplex | 2500V RMS Optocoupler Isolation | Petrochemical Tank Farm Telemetry |
| SM626H Series | 4-20mA Analog, RS485, 4G/GPRS | Modbus RTU, MQTT, Cellular Cloud Telemetry | Multi-channel Analog & Digital Input | Industrial Surge & ESD Protection | Remote Water & Gas Monitoring |
| SM181-01-A | HART 4-20mA Current Loop, RS485 | HART Command Set to Modbus RTU | Point-to-Point Transmitter Bridging | Built-in 250Ω Loop Resistor | Smart Instrument Integration to PLC |
Engineered to operate reliably under extreme industrial stress, electrical noise, and hazardous conditions.
Petrochemical refining and offshore extraction require real-time pressure, flow, and temperature monitoring. Songmao's multi-channel HART collectors (SM100-M32/M16) collect HART instrument variables from explosive zones and stream data to central DCS systems via Modbus TCP switches without signal dropouts.
District heating stations require automated BTU and steam meter monitoring across distributed suburban nodes. The SM700-T-1 serial converter switch enables seamless connection of heat meters to municipal SCADA control rooms over Ethernet networks.
Managing city gas pressure regulation stations demands continuous, low-power telemetry. Songmao's SM626H 4G wireless data collectors transmit flow converter variables directly to enterprise cloud management platforms with zero maintenance footprint.
Municipal water treatment plants utilize dozens of magnetic flowmeters and turbidity sensors. Our 4-20mA to RS485 Modbus converters (SM626H-DA) aggregate distributed sensor signals cleanly into PLC racks over long-distance RS485 buses.
Continuous Emission Monitoring Systems (CEMS) rely on precision signal acquisition. Songmao HART converters capture secondary and tertiary dynamic variables from gas analyzers, allowing environmental agencies to audit emissions accurately.
Jiaxing Songmao Electronics enforces an 18+ year strict quality management system covering raw component sourcing, SMT assembly, high-temperature burn-in testing, and electro-magnetic compatibility (EMC) verification.
MODBUS TCP (Transmission Control Protocol) is a widely used serial communication protocol in industrial automation. Learn how to configure socket connections, port 502 routing, and IP addressing with SM700 series converters.
In industrial automation, intelligent instruments, PLC control systems, and IoT data collection, Modbus remains the universal language. Read our deep engineering guide on memory mapping and polling optimization.
Understanding master-slave request cycles, polling interval calculations, and buffer overflow prevention in multi-channel data acquisition switches like the SM100-M series.
Step-by-step connection topology for HART MODEM devices, hand-held configurators, and HART-to-RS485 converters for calibration and continuous telemetry.
As industrial networks transition toward unified Ethernet architecture, Songmao Electronics is pioneering next-generation switching innovations:
Integrating Advanced Physical Layer (Ethernet-APL) into HART converters, allowing 10 Mbit/s high-speed data transmission over legacy 2-wire fieldbus cabling directly into hazardous Ex-Zone 0/1 environments.
Embedding lightweight AI inference chips into SM626H data switches for real-time anomaly detection, vibration frequency FFT analysis, and predictive maintenance alerting prior to SCADA polling.
Incorporating hardware security elements (TPM 2.0 modules), encrypted Modbus TCP, and signed firmware verification to protect critical infrastructure against industrial cyber threats.
Explore Songmao's specialized data collectors, HART to Ethernet converters, and remote 4G telemetry modules.
