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How to Use the Parallel Scan HART Protocol Converter Efficiently: Complete Guide 1.1 Product Introduction The SM100-M-8 HART data collector is a product developed using an ARM microprocessor, specialized chips for HART protocol modulation/demodulation, as well as extensive practical experience. It is designed in accordance with the requirements for industrial products, offering high reliability and stability. The data collector is equipped with a standard RS485 interface and a gateway, enabling transparent data transmission with smart instruments that use the HART protocol, or allowing data to be converted to MODBUS_RTU or MODBUS_TCP formats for reading, thus ensuring real-time data transmission. The HART protocol uses the Bell202 Frequency Shift Keying (FSK) standard, superimposing a modulated digital signal on the 4–20mA signal; this allows HART-enabled instruments to enable two-way data communication without interfering with the 4–20mA analog signal. The SM100-M series HART data collectors are intelligent converters that perform bidirectional modulation and demodulation of digital signals and analog signals. 1.2 Product Features ● Supports simultaneous connection of 8 HART devices. ● It supports parallel simultaneous scanning of all HART channels configured on the HART data collector. ● There is full electromagnetic isolation among HART channels, as well as between them and the main power supply; the electromagnetic isolation voltage of the HART module is not less than 1500V, and it supports the separation of HART signals from 4–20mA signals. ● The isolation voltage for the RS485 interface and NET Ethernet interface should be no less than 1500V. ● It adopts a modular design with the HART module separated from the host, enabling online replacement of the HART module for any channel. ● Each channel has a separate indicator light that provides indications for whether the HART device is online and for its communication status. ● Equipped with device status indicator lights: running/fault, communication interface, etc. ● Data refresh rate per channel < 1 second. ● It supports Ethernet interfaces (with a speed of at least 100Mbps) and RS485 interfaces. ● It supports proprietary HART commands to read the HART ID of all HART devices. ● It supports configuration and operation modes, as well as Telnet remote setup. ● Supports firmware program updates. ● Supports standard DIN rail mounting. ● Whether the device is operating normally, powered off, or faulty, it does not affect the transmission and accuracy of the 4–20mA analog signal, with the loop resistance being less than or equal to 250 ohms. ● This device does not supply power to the field instruments. ● Compatible with HART protocol Ver5.0 and above. ● Wiring method of the HART data collector to analog circuits: Connect the surge protector to the input side and to the output side. 1.3 Main parameters ● Supply voltage: DC 24V. ● Operating current: ＜80mA. ● Case dimensions: Length 177 mm × Width 135 mm × Height 37 mm. ● Installation dimensions: Length 165 mm × Width 108 mm × Height 37 mm. ● Operating ambient temperature: -20°C to +75°C. ● Working environment humidity: 5% ~ 95% (no condensation). 1.4 Product Selection 1.5 Product Wiring Diagram 1.6 Product Application Diagram Wang Yanping, Marketing Department, Jiaxing Songmao Electronics Market 18757399889 2025.12.03