Key benefits Wide input voltage and system compatibility Input range 3 V to 5.5 V Fully compatible with 3.3 V and 5 V systems 3.3 V and 5 V communication signals can be matched Robust electrical isolation Power and data are completely isolated Isolation voltage up to 2500 VDC Improves safety and reduces interference between power and signal sides Practical and easy to use design Halfhole process design Board thickness 0.8 mm Easy to mount and supports solder terminals TX/RX visibility RX/TX send and receive status view performance isolation for TTL and RS485 Uses a end isolation chip Achieves TTL and RS485 isolation on both sides of power Strong antiinterference capability Specifications and features Input voltage range: 3 V to 5.5 V Compatible with 3.3 V and 5 V systems Signals: TTL and RS485 on both sides with isolation Isolation voltage: up to 2500 VDC Construction: halfhole design Board thickness: 0.8 mm Mounting: easy to use with solder terminals Status indicators: RX and TX signal visibility for send/receive Applications and use scenarios Industrial control and automation Isolate a 3.3 V microcontroller network from higher voltage RS485 devices Maintain signal integrity and protect controllers in harsh environments Sensor networks and data acquisition Connect lowvoltage sensors (3.3 V/5 V) to RS485 data loggers or gateways Reduce ground loops and electromagnetic interference Consumer electronics and embedded projects Interface 3.3 V MCU peripherals to 5 V devices with isolation Use in projects requiring safe, isolated TTL and RS485 communication Note: This description preserves the original product's specifications and intended functions, including the wide input range, complete powertosignal isolation with up to 2500 VDC, 0.8 mm thick halfhole design, RX/TX visibility, and the use of a end isolation chip to enable TTL and RS485 isolation with antiinterference performance.