This industrial-grade TTL to RS485 adapter module is designed for reliable, stable, and interference-free serial communication across long distances. Engineered with a wide 3.0V–30V power input range, it seamlessly supports both 3.3V and 5.0V signal systems, making it compatible with a wide variety of microcontrollers and embedded devices used in Bangladesh’s industrial automation, IoT, security systems, and communication networks. The module offers fully automatic flow direction control, RXD/TXD indicator lights, and robust lightning protection to ensure consistent performance in harsh environments.

Equipped with high-quality imported chips, anti-interference circuitry, wiring terminals, and silicone wire, this RS485 converter guarantees strong EMC/EMI resistance, reliable data transmission, and long-distance operation without signal loss. It is easy to install, supports hot-swap functionality, and integrates smoothly into new or existing systems.

Features:

• Lightning protection and anti-interference hardware design for high-stability communication

• Excellent EMC and EMI performance suitable for industrial environments

• Automatic RS485 signal flow direction control for seamless sending/receiving switching

• Supports both indoor short-distance and outdoor long-distance transmission

• Earth-grounding support for enhanced lightning protection during field installations

• Standard 2.54mm pitch pin headers for secondary development and custom integration

• Built-in 120-ohm termination resistor (enable by short-circuiting R0) for long-distance communication

• Supports multi-node RS485 networks with at least 40 devices on the same bus

• Hot-swap capable without causing data blockage or signal conflict

• Copper-laid PCB with optimized wiring to minimize interference and ensure long-range data integrity

• RXD and TXD indicator LEDs for quick monitoring of data transmission

• Industrial-grade performance with durable components and 1-year warranty

Specifications:

• Operating Voltage: 3V to 30V DC

• Compatible Signal Levels: 3.3V, 5.0V

• Operating Temperature: -40°C to 85°C

• Baud Rate Range: 110bps to 256000bps

• Dimensions: 52mm × 24mm × 6mm

• Weight: 10g

How to Use:

• Connect the wiring terminals or silicone wire to your RS485 A/B lines

• Interface the TTL pins (TXD, RXD, GND) with your microcontroller or serial device

• Short-circuit R0 if termination resistance is needed for long-distance transmission

• Use earth-ground connection for outdoor or long-range installation to enhance lightning protection

• Power the module using any 3.0V–30V DC source depending on your system requirement

• Observe RXD/TXD LED indicators to verify the communication status

• Hot-swap when needed without shutting down the system

Application Instructions:

• Ensure proper polarity and wiring when connecting TTL and RS485 interfaces

• For multi-device networks, maintain correct bus topology and avoid star-shaped wiring

• Ground the module only when used in long-distance outdoor environments

• Keep cable lengths optimized and use shielded twisted-pair cables for best performance

• Maintain baud rate consistency across all devices in the RS485 network

Package Includes:

• 1 × TTL to RS485 Adapter Module (485 to TTL Level Converter with RXD/TXD Indicators)

• 1 × Connection Cable

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