High-precision hardware solutions designed to modernize Uzbekistan's smart grids, gas plants, and process loops.
Uzbekistan is undergoing a rapid, state-led industrial metamorphosis. In line with the "Strategy of Actions on Five Priority Development Directions", massive capital investments are flowing into the modernization of petrochemical refineries, natural gas distribution channels, thermal power installations (such as the Syrdarya and Tashkent TPPs), and municipal heating grids. This industrial transformation requires a paradigm shift from pure analog monitoring to data-driven smart telemetry.
At the center of this technological modernization is the HART (Highway Addressable Remote Transducer) protocol. Despite the rise of pure digital fieldbuses and industrial Ethernet architectures, 4-20mA process loops remain the structural backbone of Uzbekistan’s refineries and chemical synthesis lines (particularly in the Navoiy and Fergana complexes). Replacing these millions of kilometers of legacy copper wires is economically unfeasible. Instead, utilizing HART Modems and Data Collectors represents a pragmatic, high-efficiency path to digitalization. It allows engineers to extract secondary variables (such as temperature, diagnostics, and multi-variable sensor health parameters) superimposed on the existing analog loop without interrupting process control signals.
By implementing industrial-grade HART-to-Modbus RTU converters, facilities in Uzbekistan can access device status and diagnostic layers directly. This reduces commissioning costs by up to 40% and switches maintenance schemes from reactive or schedule-based to highly accurate predictive maintenance. This shift significantly reduces plant downtime during critical refinery phases.
Modern Distributed Control Systems (DCS) and Programmable Logic Controllers (PLCs) in new infrastructure projects natively communicate via Modbus TCP/IP, Modbus RTU, or Industrial Ethernet. Yet, field instruments—such as pressure transmitters, electromagnetic flowmeters, and control valve positioners—rely on FSK-modulated HART signals. Our range of Chinese manufactured industrial gateways act as a translation bridge, demodulating Bell 202 FSK signals into structured Modbus registers. This allows seamless telemetry integration into SCADA dashboards without the need for high-end, proprietary analog input modules.
HART operates by overlaying a digital signal on top of the 4-20mA current loop using Frequency Shift Keying (FSK). The logic '1' is represented by 1200 Hz, and logic '0' by 2200 Hz. Our converters utilize highly integrated filter circuits to prevent noise pollution from variable frequency drives (VFDs) and heavy machinery.
To receive the FSK signal, a minimum of 250 ohms loop resistor is required in the analog path. Our hardware includes built-in switchable 250-ohm loop resistors and 1.5KV galvanic isolation, shielding PLC input channels from common-mode voltage surges and ground loops common in industrial yards.
For systems that only need process variable retrieval (without high-speed loop response), our data collectors support HART Multi-drop mode. Up to 15 or 32 field instruments can be connected in parallel on a single twisted pair, significantly reducing cable, installation, and field barrier costs.
Compare key parameter thresholds of China Songmao converters optimized for the Central Asian energy sector.
| Model Name | Channel Density | Isolation Rating | Interface Options | Key Application |
|---|---|---|---|---|
| SM100-C (III) Series | Single Channel (Point-to-point) | 1000 VDC | USB Type-B / FSK clip | Field calibration & engineering diagnosis via laptop |
| SM101-D Industrial | Single Channel | 1500 VDC | RS485 / RS232 / Modbus RTU | Permanent installation for single transmitter to PLC link |
| SM100-M-8 Collector | 8-Channel (Parallel polling) | 1500 VDC | RS485 / Modbus RTU & TCP | Multi-drop data concentration for gas storage manifolds |
| SM626H-DA Telemetry | Multivariable Collector | 2000 VDC | RS485 / 4-20mA / Modbus | Remote RTU telemetry stations with high environmental noise |
As industrial automation demands grow in Uzbekistan, procurement departments face the challenge of securing reliable products amid global supply chain disruptions. Jiaxing Songmao Electronics Co., Ltd. address this by operating a state-of-the-art production facility in Zhejiang, China. This facility integrates Industry 4.0 principles with lean manufacturing workflows.
Our vertical integration enables rigorous quality control at every stage of production—from surface-mount technology (SMT) component placement to automated validation of FSK waveforms. Rather than relying on third-party assembly, we conduct detailed thermal cycling, stress testing, and calibration in-house. This ensures that every HART modem and data collector delivered to Navoiy or Tashkent operates reliably under extreme desert temperatures (-40°C to +85°C).
For global buyers, this translates to high reliability, stable pricing, and short lead times. We maintain a strategic inventory of core microprocessors and precision components, shielding our supply chain from market fluctuations and ensuring prompt delivery for large-scale engineering projects.
How HART protocol systems are deployed across Uzbekistan's core infrastructure sectors.
Integrating multi-variable flowmeters at refineries. By deploying the SM100-M-8 Data Collector, site operators can capture temperature, differential pressure, and primary flow rate from a single field transmitter. This eliminates the need to run extra sensor cables in hazardous zones.
Long-distance pipeline telemetry where signal attenuation is high. Our RS485-isolated converters ensure that remote terminal units (RTUs) can reliably communicate with pressure and gas leak monitoring sensors over copper loops exceeding 1.2 kilometers.
Automating District Heating Stations. Integrating existing electromagnetic energy meters and control valves with Modbus-based RTUs allows the city's heating utility to optimize thermal distribution based on real-time feedback loops.
Established in 2007: Over 18 Years of Innovation in Industrial Automation
Jiaxing Songmao Electronics Co., Ltd. is a specialized developer and manufacturer of industrial-grade communication solutions. Based in Jiaxing, Zhejiang, our engineering team focuses on independent research, development, and manufacturing of HART protocol converters, data acquisition modules, and Modbus gateways.
Over the past two decades, our hardware has been deployed across 40+ countries. We help process industries digitize their infrastructure without incurring high replacement costs, delivering high performance and durability under challenging field conditions.
Our HART communication modules and data collectors are deployed in demanding industrial environments around the globe:
Our production conforms to global QA standards, ensuring trouble-free integration and operation in critical infrastructure.
Patent Certification
Software Patent
ISO 9001 Quality System
CE Directive Compliance
Direct supply from the factory floor. Select from our range of signal conversion products, customized for process engineering requirements in the Uzbekistan market.
Deepen your team's integration knowledge with our engineering field logs:
Technical insights addressing common challenges faced by industrial integration engineers in Central Asia.
