Description
This TTL to RS485 converter module is designed to seamlessly convert TTL-level serial signals into RS485 signals, enabling reliable long-distance and multi-device communication. Engineered with strong anti-interference protection and industrial-grade components, it ensures stable data transmission even in electrically noisy environments. The module supports both 3.3V and 5V systems, making it highly compatible with a wide range of microcontrollers and development platforms.
Key Features
- TTL to RS485 Signal Conversion: Enhances compatibility between TTL devices and RS485 networks
- 120Ω Termination Resistor: Built-in termination resistor, enabled by shorting the R0 pin (recommended for long-distance communication)
- Multi-Device Support: Allows connection of up to 40 nodes on the same RS485 bus
- Anti-Interference Design: Optimized wiring layout and copper routing to reduce signal noise
- Industrial-Grade EMC/EMI Protection: Strong resistance to electromagnetic interference for stable communication
- Wide Voltage Compatibility: Supports both 3.3V and 5V logic levels
- Standard 2.54mm Pin Header: Easy integration into custom development and prototyping projects
- TXD/RXD LED Indicators: Visual monitoring of data transmission and reception status
- Easy Installation: Supplied with insulated wires and terminal connectors
- Grounding Support: Earth terminal improves stability in outdoor or long-distance installations
Specification
- Input Voltage Range: 3.0V – 30V
- Maximum Voltage: 33V (recommended ≤30V, minimum ≥2.8V)
- Communication Interface: RS485 (high-power industrial interface)
- Logic Level Support: 3.3V and 5.0V systems
- Communication Distance:
- Up to 1 km (tested with 850m of 2 × 1.5mm² cable)
- Recommended ≤800m or use a repeater beyond this distance
- Operating Temperature: -40°C to +85°C
- Dimensions: 52 × 23 × 11 mm
- Build Quality: Industrial-grade design with high-quality imported components
- EMC/EMI Performance: Excellent electromagnetic compatibility and interference resistance
Application
- Long-distance serial communication for microcontrollers
- RS485-based Modbus protocol implementation
- Industrial automation and control systems
- Multi-device communication networks
- Outdoor and high-interference environments.