features: 1. Compatible with TTL/RS422 standard, can convert TTL signal into differential RS422 signal, and support full duplex communication. 2. Compatible with 3.3V~5V TTL signal level, with anti reverse connection and anti overvoltage circuit at the power supply end<br> 3. On board integrated power isolation can provide stable isolation voltage without additional power supply at the isolation end<br> 4. On board integrated digital isolation, signal isolation, high reliability, strong anti-interference and low power consumption<br> 5. On board TVS ( ient voltage suppression tube) can effectively suppress surge voltage and ient peak voltage in the circuit, and prevent static electricity<br> 6. Board mounted self recovery fuse and protective diode can ensure stable output of current and voltage, prevent over-voltage and over-voltage, and improve impact resistance. 7. On board RS422 input and output 120R resistors can be switched with built-in jumper caps. 8. Industrial guide type ABS environment-friendly shell, small size, convenient installation, cost-effective<br> Specifications:<br> Color: white<br> Material: ABS<br> Product type: electrical isolated TTL to RS422 serial port converter<br> Power supply interface:<br> Power supply voltage: 3.3V~5V<br> Interface protection: anti overvoltage and anti reverse connection<br> Equipment interface: compatible with TTL/RS422 standard<br> TTL interface:<br> Interface type: terminal block<br> mission distance: about 10m<br> mission mode: point-to-point<br> RS422 interface:<br> Interface type: terminal block<br> Interface protection: provide anti surge and 15KV static protection<br> Terminal resistance: 120R, which can be switched and enabled through jumper cap (it can be set only after the shell is disassembled)<br> mission distance: about 1200m<br> mission mode: full duplex mode, point to many, (256 nodes can be connected at most, and repeaters are recommended for more than 16 nodes)<br> H