🔌 Product Overview – Unit RS485-ISO Isolated RS485 Transceiver
Unit RS485-ISO is a compact, high-reliability isolated half-duplex RS485 transceiver module designed for industrial serial communication. It converts TTL-level signals to RS485 differential signals, enabling long-distance, noise-resistant data transmission between microcontrollers and RS485-enabled devices.
Built around the robust CA-IS3082W isolation chip, this module offers strong protection against electrical noise, voltage spikes, and transient surges. It ensures signal integrity and safeguards expensive control equipment in harsh environments. The integrated fail-safe receiver outputs a high level when the input is open or shorted, enhancing communication stability.
With support for up to 256 RS485 bus nodes and a transmission rate of up to 500 Kbps, Unit RS485-ISO is ideal for multi-point communication systems in industrial automation, building control, and sensor networks. If your project demands RS485 protocol conversion with high isolation and signal integrity, this module is a reliable choice.
✨Features
- 🧩 Built-in CA-IS3082W digital isolation transceiver
- ⚡ Integrated isolated DC-DC power supply
- 🚀 Signal transmission rate: up to 500 Kbps
- 🛡️ Fail-safe receiver for open or shorted bus conditions
- 🔗 Supports up to 256 RS485 bus nodes
- 🔌 Isolation withstand voltage: up to 1000 VRMS
- 💻 Compatible with Arduino, UIFlow Blockly, and UIFlow Python
- 🧱 Includes 2 LEGO-compatible mounting holes
📦 Package Contents
- 1 × Unit RS485-ISO Module
- 1 × VH-3.96 4P Connector
- 1 × 120Ω Termination Resistor
- 1 × HY2.0-4P Grove Cable (20cm)
- 1 × I/O Label Sticker
🎯 Typical Applications
- Industrial RS485 communication between microcontrollers and field devices
- Long-distance serial data transmission in noisy environments
- Multi-node RS485 bus systems in automation and control
📐 Technical Specifications
| Specification | Parameter |
|---|---|
| Isolation Voltage | 1000V |
| Max Bus Nodes | 256 |
| ESD Protection | ±15KV |
| Protection Features | Fail-safe, Overcurrent, Thermal Shutdown |
| Module Dimensions | 56.0 × 24.0 × 10.2 mm |
| Net Weight | 9.1g |
| Package Dimensions | 138.0 × 93.0 × 11.2 mm |
| Gross Weight | 17.8g |
📄 Circuit Schematics
🔌 Pin Mapping
Unit RS485-ISO
| HY2.0-4P | Black | Red | Yellow | White |
|---|---|---|---|---|
| PORT.C | GND | 5V | UART_RX | UART_TX |
📏 Mechanical Drawing
📑 Datasheets
Download CA-IS3082W Datasheet (PDF)
💻 Software & Examples
Arduino
Arduino Test Example for RS485-ISO
UiFlow1
🧩 EasyLoader
| EasyLoader | Download Link | Remarks |
|---|---|---|
| RS485-ISO EasyLoader | Download | / |