The IoT Gateway HMJ1020-WJM485 is a multifunctional relay device that supports multiple communication methods, including LoRa, RS485, Ethernet, and fiber optic connections. It integrates data acquisition, edge computing, and local data storage, making it an ideal solution for indoor monitoring environments such as distribution rooms.
With real-time processing of partial discharge, current, temperature, and other sensor data, the gateway effectively reduces server load while ensuring reliable data transmission. Even during network disconnections, it continues to operate normally, caching monitoring data locally and automatically synchronizing with the cloud once the connection is restored, ensuring data integrity and reliability.
Model：
HMJ1020-WJM485
Product Overview：
The HMJ1020-WJM485 IoT Gateway is designed to communicate with online monitoring sensors as an intermediate relay device. It supports LoRa wireless, RS485, Ethernet, and fiber optic communication for flexible networking.
By integrating data collection, partial discharge edge computing, and data storage, the gateway performs local processing to reduce transmission and server-side computing pressure. This improves real-time responsiveness and reliability in field monitoring applications.
When the network is offline, the IoT Gateway continues to monitor and store partial discharge data. Once connectivity is restored, cached data is automatically synchronized to the cloud platform, ensuring complete and accurate information.
Key Features
- Comprehensive Data Acquisition
Supports both wired and wireless communication for collecting partial discharge, current, temperature, and other parameters.
- Edge Computing Capability
Performs real-time data filtering and algorithmic analysis on-site, improving responsiveness and reducing central server load.
- IoT Communication Gateway
Converts communication protocols between sensors and the master station, supporting standard information models.
- Easy Installation
Designed for indoor use, typically wall-mounted in distribution rooms near smart sensors for quick and convenient deployment.
Technical Specifications
| Item | Specification |
| Rated Voltage / Frequency | 100–240VAC, 50Hz / 60Hz |
| Power Consumption | ≤ 8W |
| Downlink Communication | Wireless LoRa, RS485 |
| Downlink Frequency Band | 470–510MHz |
| Uplink Communication | RS485, Ethernet, Fiber Optic |
| Supported Protocols | MQTT, HTTP, Modbus |
| Communication Standards | IoT Wireless Networking Protocol for Power Transmission Equipment; IoT Low-Power Wireless Communication Protocol for Power Equipment |
| Data Transmission Standard | IoT Sensor Data Specification for Power Transmission Equipment |
| RS485 Baud Rate | Default 9600bps, adjustable 1200–19200bps |