WisNode Bridge Serial
CH-7431
The CH-7431 is a bi-directional RS485 to LoRaWAN bridge. As a LoRaWAN end-node it is ready to be connected to a LoRaWAN gateway like the CH-7249.
Modular Components
The CH-7431 is built with WisBlock modules. This enables future extension or hardware upgrades with a simple plug-and-play technology.
WisBlock Components:
- WisBlock Base RAK5005 – base board
- WisBlock Core RAK4201- low-power STM32L071 MCU
and SX1272 LoRa transceiver - WisBlock IO RAK5802 – RS485 Modbus to LoRa bridge
Peripheral and Power Supply Connectors
Reliable screw terminal interface makes it simple to connect the power supply and the RS485 devices to the CH-7431.
For the devices set-up a computer can be connectecd throught the standard USB Micro connector.
Durable Enclosure
The RS485 bridge comes in an industrial-grade IP31 enclosure. Several mounting points give flexibility when deploying the modules.
Production Features
- LoRaWAN 1.0.3 protocol stack, supports Class A & C
- Working modes: Polling mode, transparent mode, and packet mode
- Remote cloud management of RS485 devices
- Can address up to 16 RS485, a queue with up to 32 instruction sets
- Industrial grade STM MCU: ultra-low-power (4uA sleep) and wide temperature range of operation.
- Wide range of input voltages, 8-48V DC input
- Can power RS485 devices via a dedicated output.
- Mounting: Wall, DIN rail, and magnetic mounting
- Compliant with IEC61000-4-2, IEC61000-4-4, and 18KV HMB ESD protection
Product Inclusions ｜ Applications
- 1pc WisNode Bridge Serial
- 1pc 24V/300mA Power Adapter
- 1pc Antenna for LoRa
- 1pc Micro USB Cable
- 1pc Mounting Kit
- Power system data collection and control
- Smart agricultural sensor data collection
- Industrial sensor data acquisition
- Electrical equipment control in smart building
Main Specifications
| parameter | Value | remarks |
|---|---|---|
| LoRaWAN Protocal | LoRaWAN 1.0.3 | |
| LoRa Frequency | RU864, IN865, EU868, US915, AU915, KR920, KR923 | Different models support different frequency bands |
| LoRaWAN Mode | Class A / Class B/ Class C | |
| LoRa Tx Power | 20dBm | |
| LoRa Antenna interface | SMA MALE, External omnidirectional Antenna | |
| RS485 Data Rate | Configurable 9600 -115200bps | |
| RS485 Carrying Capacity | 16 Nodes | |
| RS485 Protection | 18KV HBM protection 13KV IEC61000-4-2 contact discharge 4KV IEC61000-4-4 fast transient burst | |
| Input Voltage | 8V – 48V | 5V for Micro USB |
| Rated Power | Maximum 1W | |
| Output Voltage | 8V – 48V | |
| Configuration Interface | Micro USB | |
| Indicator LED | Power LED, Data LED | |
| Housing Material | Metal | |
| Dimension | 93.6mm x 100.3mm x 24mm | |
| Protection Grade | IP31 | |
| Installation | Wall mounting, DIN rail installation, magnetic mounting | Magnetic mounting requires optional accessories |
| Working Temperature | -30°C ~ 65°C | |
| Storage Temperature | -40°C ~ 85°C |
