Product overview and key benefits - USB 2.0 to RS485 converter using the CP2102 (Silicon Labs) main chip for reliable, industrial-grade USB‑to‑485 conversion. - Hot‑pluggable USB interface for easy, tool‑free connection to PCs and embedded systems. - High performance: supports baud rates up to 921600 bps (well above 115200) for fast serial data transfer. - Robust industrial protection: TVS transient suppression, 15 kV ESD protection, AB signal‑line short‑circuit protection, and power short‑circuit protection (short circuits will not burn the device). - Broad compatibility with RS485 interfaces and common operating systems for straightforward integration. Key specifications (as provided) - Main chip: CP2102 (Silicon Labs), industrial grade. - USB: USB 2.0 interface, hot‑plug supported. - Supported operating systems: Windows 98, 2000, 2003, 2008, XP, Windows 7, Windows 8, Windows 10, Vista, and Linux. - Maximum supported baud rate: 921600 bps. - Transmission distance: up to 1200 meters (tested at 9600 baud); also specified for RS485 docking up to 1000 meters depending on installation and environment. - Protection features: TVS transient suppression, ESD protection (15 kV), AB line short‑circuit protection, and power short‑circuit protection. - Lead pins: A+, B, GND, GND, 5V0. What this product solves - Converts USB ports on modern PCs and laptops into an RS485 serial interface for connecting meters, controllers, sensors, and industrial devices. - Eliminates the need for legacy serial ports or complex interface cards; plug in the USB converter and connect RS485 wiring directly. - Supports high baud rates for time‑sensitive data and long‑distance RS485 links with built‑in protection to resist transient and static damage on noisy industrial lines. Practical features and performance - Wide OS support: works across older and current Windows releases as well as Linux, enabling use with legacy systems and newer machines. - Hot‑plug capability: connect and disconnect USB without rebooting the host system. - Long‑range communication: rated for long cable runs typical in building automation and industrial control, with transmission distance guidance up to 1000–1200 meters depending on baud rate and environment. - Industrial protection: designed to withstand electrostatic discharge and line faults common in industrial and field deployments. Typical applications - Building automation: connect HVAC controllers, lighting controllers, and energy meters on RS485 networks to a PC for monitoring and configuration. - Industrial control and PLC interfaces: interface programming or monitoring tools via USB to RS485 for PLCs, motor controllers, and I/O modules. - Field device commissioning and diagnostics: use with handheld laptops or test equipment to read sensors, configure devices, or capture serial data during on‑site troubleshooting. What to expect in use - Simple connection: plug the device into a USB port, attach RS485 A+/B and ground lines, and use standard serial port settings in your software (select the created COM port and set the desired baud rate). - Durable operation in industrial environments due to ESD and transient protection; multiple ground pins to ease wiring. - High‑speed capability for demanding serial applications while maintaining compatibility with lower baud settings and long cable runs. Included connections and wiring - Pins: A+, B (data differential pair), GND, GND, 5V0 (power reference). - Designed for direct docking with a variety of RS485 interface equipment. Notes and installation tips - Maximum transmission distance depends on baud rate, cable quality, and installation conditions; testing was performed at 9600 baud with results up to 1200 meters. - Ensure proper grounding and cable selection for long runs and noisy environments to maximize reliability and minimize errors. - Use appropriate termination resistors and biasing on RS485 lines per your network topology and device requirements. This device is intended for reliable USB to RS485 conversion in industrial and field environments where robust protection, broad OS compatibility, and high baud‑rate performance are required.