Waveshare Rail-Mount TTL to RS485 Isolated Converter, Multi-Isolation Protection, Compatible with TTL/RS485 Standard

Compatible with TTL/RS485 standard, converting the TTL signal into differential RS485 signal, support half-duplex communication. Compatible with 3.3V~5V TTL signal level, provides over-voltage protection for power supply interface
Onboard unibody power supply isolation, provides stable isolated voltage and needs no extra power supply for the isolated terminal. Onboard unibody digital isolation, allows signal isolation, high reliability, low power consumption
Onboard TVS (Transient Voltage Suppressor), effectively suppresses surge voltage and transient spike voltage in the circuit, anti-electrostatic. Onboard RS422 input and output terminal 120R resistor, enabled/disabled via jumper