The SDS143D features one RS485 interface and one Ethernet interface. It supports Modbus gateway functionality, MQTT gateway capabilities, JSON-to-Modbus RTU/DL/T 645 protocol conversion, as well as custom heartbeat and registration packet functions.
DIN-rail mount design: Suitable for installation inside industrial cabinets.
Compact size: Narrower than standard serial servers, saving space.
Terminal-block power input (9–24V wide-voltage range) with reverse-polarity protection.
Terminal-block RS485 interface, supporting up to 32 slave devices.
Baud rate support: 300–115,200 bps.
Software Features
Supports TCP Server, TCP Client, UDP, and UDP Multicast modes.Functions as a TCP Client while simultaneously supporting TCP Server capabilities.
Supports up to 30 concurrent TCP connections in Server mode, and up to 7 destination IP addresses in Client mode.
Baud rate ranges from 300 to 921600 bps; data bits support 7~8 bits. Parity options include five modes: None, Odd parity, Even parity, Mark and Space.
Supports sending the device ID upon connection, facilitating cloud-based device management.
Provides a DLL development library for secondary development, used for PC-side device discovery and configuration.
Supports configuration via web browser, DHCP for dynamic IP assignment, and DNS protocol for resolving domain server addresses.
Supports remote cloud functions including device discovery, parameter configuration and firmware upgrade.
Remotely view the device’s TCP connection status as well as serial port transmit and receive status via software. The virtual serial port supports data monitoring.
| Item | Specification | |
| Outline | Interface | 485: Terminal block |
| Power Supply | Terminal block connection | |
| Case material | White flame-retardant plastic | |
| Dimensions L × W × H | 89x37x59mm | |
| Communication Interface | Ethernet | RJ45 port, 2kV surge protection |
| Serial Port | 5143D: RS485 × 1: 485A, 485B | |
| Serial Port Parameters | Baud Rate | 300~921600 bps |
| Parity | None, Odd parity, Even parity, Mark, Space | |
| Data Bits | 7~8 bits | |
| Flow Control | No flow control | |
| Software | Protocols | ETHERNET, IP, TCP, UDP, HTTP, ARP, ICMP, DHCP, DNS |
| Configuration Method | WEB browser, device management function library | |
| Communication Mode | TCP/IP direct communication, virtual serial port | |
| Operating Modes | TCP Server, TCP Client (TCP Server and Client can run simultaneously), UDP, UDP Multicast | |
| Power Requirements | Power Supply | 9~24V DC |
| Environmental Requirements | Operating Temperature | -40~85℃ |
| Storage Temperature | -45~100℃ | |
| Humidity Range | 5~95% RH (Relative Humidity) | |
Application Areas
Acts as an IoT gateway, serving as a communication bridge between devices and the cloud.
Power systems, smart metering, and energy consumption monitoring.
Remote monitoring and program downloading for various industrial PLCs.
Communication interfaces for various SCADA/HMI software and equipment.
Network connectivity for devices in access control and security systems.