Compatible with TTL/RS485 standard, converts TTL signal to differential RS485 signal for half-duplex communication. Supports 3.3V to 5V TTL signal levels with overvoltage protection circuit on the power supply end. Onboard integrated power isolation provides stable isolation voltage; isolation side does not require external power supply. Integrated digital isolation ensures signal isolation with high reliability, strong anti-interference capability, and low power consumption. Equipped with transient voltage suppressor (TVS) to effectively suppress surge and transient voltages, providing protection against electrostatic discharge. Features self-resetting fuses and protection diodes to ensure stable current and voltage output, preventing overcurrent and overvoltage conditions, enhancing system durability. Onboard RS485 output includes a 120-ohm termination resistor that can be enabled via solder jumper. Designed with black immersion gold technology, compact size for easy integration and embedding. Product Type: Electrically Isolated TTL to RS485 Serial Converter Power Supply Interface: 3.3V to 5V Interface Protection: Overvoltage Protection Device Interface: Compatible with TTL/RS485 Standards TTL Interface Transmission Distance: Up to 10 meters Transmission Mode: Point-to-Point RS485 Interface Interface Protection: 200W Surge Protection, 6kV Electrostatic Protection Termination Resistance: 120 ohms (solder jumper enabled) Transmission Distance: Up to 1200 meters Transmission Mode: Point-to-Multipoint (supports up to 32 nodes; repeater recommended for more than 16 nodes) Color: Black Material: PCB Package Contents: 1 x TTL to RS485 Module Note: Light reflection and display differences may cause slight color variation between image and actual item. Measurement tolerance: 13 cm.