Features: 1. Compatible with TTL/RS422 standard, converts TTL signals to differential RS422 signals, and supports full duplex communication. 2. Compatible with 3.3V to 5V TTL signal levels, includes reverse polarity protection and overvoltage protection at the power supply end. 3. Onboard integrated power isolation provides stable isolation voltage without requiring an additional power supply on the isolated side. 4. Onboard integrated digital isolation ensures signal isolation, high reliability, strong anti-interference performance, and low power consumption. 5. Onboard TVS (transient voltage suppression) diode effectively suppresses surge voltages and transient peaks in the circuit and helps prevent electrostatic discharge. 6. Board-mounted self-recovery fuse and protective diode ensure stable current and voltage output, protect against overvoltage conditions, and improve surge resistance. 7. Onboard RS422 input and output 120 ohm termination resistors can be switched using built-in jumper caps (configuration requires shell disassembly). 8. Industrial guide-type ABS environmentally friendly housing, compact size, easy installation, and cost-effective. Specifications: Color: White Material: ABS Product Type: Electrically Isolated TTL to RS422 Serial Port Converter Power Supply Interface: Power Supply Voltage: 3.3V to 5V Interface Protection: Overvoltage protection and reverse connection protection Equipment Interface: Compatible with TTL/RS422 standard TTL Interface: Interface Type: Terminal block Transmission Distance: Up to 10 meters Transmission Mode: Point-to-point RS422 Interface: Interface Type: Terminal block Interface Protection: Surge protection and 15kV static protection Termination Resistance: 120 ohms, switchable via jumper cap (requires shell disassembly for setup) Transmission Distance: Up to 1200 meters Transmission Mode: Full duplex, point-to-multipoint (supports up to 256 nodes; repeaters recommended for more than 16 nodes)