TTL to RS485 Electrical Isolation Module DIN Rail Serial Converter Surge ProtectTTL to RS485 Electrical Isolation Module DIN Rail Serial Converter Stable Communication 600W Lightning Protection Features: 1. Compatible with TTL RS485 standard, it can convert TTL signals into differential RS485 signals, half duplex communication 2. Compatible with 3. 3V ~ 5V TTL signal level, power supply terminal has anti reverse and anti overvoltage circuit 3. On board integrated power supply isolation can provide stable isolation voltage, and