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Waveshare Industrial Grade USB to RS485/RS422 Isolated Converter
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The Waveshare Industrial Grade USB to RS485/RS422 Isolated Converter provides a dependable way to connect a USB host to RS485 or RS422 industrial communication equipment. Built with original FT232RL and SP485EEN chips, it supports communication speeds from 300 bps to 3 Mbps and offers automatic hardware direction control for smooth data transmission.
The converter features galvanic power and digital isolation, along with 600W surge/lightning protection, 15KV ESD protection, a 200mA self-recovery fuse, and protection diodes for safer operation in electrically noisy environments. It supports RS485/RS422 transmission distances of approximately 1.2 km at low data rates, while USB transmission is approximately 5 m. The RS485 interface supports point-to-multipoint communication with up to 32 nodes, and the onboard 120Ω termination resistor can be enabled through a jumper.
With a 5V USB operating voltage, USB-B connector, screw-terminal RS485/RS422 interface, and compatibility with Windows 11/10/8.1/8/7, Linux, Mac, Android, and WinCE, this industrial USB to RS485/RS422 converter is well suited for industrial control, equipment communication, serial device interfacing, and long-distance RS485/RS422 applications. Its compact 81.9 × 54.0 × 32.0 mm ABS rail-mount enclosure also makes it convenient for installation in industrial control panels.
| Specification | Details |
|---|---|
| Product Type | Industrial Grade Isolated USB to RS485/RS422 Converter |
| Baud Rate | 300 bps ~ 3 Mbps |
| Host Port | USB |
| Device Port | RS485/RS422 |
| USB Operating Voltage | 5V |
| USB Connector | USB-B |
| USB Protection | 200mA Self-Recovery Fuse, ESD Protection |
| USB Transmission Distance | About 5m |
| RS485/RS422 Connector | Screw Terminal |
| RS485/RS422 Pins | A+, B-, PE |
| Direction Control | Hardware Automatic Control |
| RS485/RS422 Protection | 600W Lightningproof & Surge Suppression, 15KV ESD Protection |
| Balancing Resistor | Onboard 120Ω |
| RS485/RS422 Transmission Distance | About 1.2km (Low Rate) |
| Transmission Mode | Point-to-Multipoint, Up to 32 Nodes |
| Recommended Node Configuration | Repeater recommended for 16 nodes or more |
| PWR LED | Red Power Indicator – Lights when USB connection and voltage are detected |
| TXD LED | Green TX Indicator – Lights when the USB port sends data |
| RXD LED | Blue RX Indicator – Lights when the device port sends data back |
| Operating Temperature | -15℃ ~ 70℃ |
| Operating Humidity | 5%RH ~ 95%RH |
| Operating Systems | Mac, Linux, Android, WinCE, Windows 11 / 10 / 8.1 / 8 / 7 |
| Enclosure | Rail-Mount ABS Case |
| DIN Rail Compatibility | 35mm DIN Rail |
| Dimensions | 81.9 × 54.0 × 32.0mm |
This product comes with a 1-year manufacturer warranty from the date of purchase, covering manufacturing defects only.
The product shows signs of physical damage, mishandling, exposure to water/moisture, fire, natural calamities, unauthorized repairs, improper storage near heat or direct sunlight, or alteration in any way.
Packaging highlighted TVS/PTC/fuse features. Delivery matched estimate. Website detailed each protection layer’s function. Survived ESD gun test at 8kV contact. Customer experience included failure mode analysis note. Technical documentation covered clamping voltage specs. Comprehensive defense against surges, spikes, and short circuits—built for harsh environments.
Box included driver CD and QR code. Delivery arrived early. Website listed Windows/Linux/macOS compatibility matrix. Installs without issues on Win11 and Ubuntu 22.04. Customer support resolved Apple Silicon query. Technical guidance covered custom PID/VID flashing. Universal compatibility simplifies deployment across mixed-OS engineering teams.
Rigid mailer with latency test report. Delivery was express. Website listed typical 1ms round-trip time. Achieved jitter under 50µs in loopback test. Customer service confirmed real-time suitability. Technical team shared RTS toggle timing diagram. Ideal for motion control and time-critical protocols—predictable and fast response.
Box labeled RS422/485 dual-mode clearly. Delivery took four days. Website provided separate wiring diagrams for each. Switches modes via DIP settings easily. Customer service confirmed max distance for RS422. Technical guidance covered point-to-point vs multi-drop. Versatile for legacy and modern serial protocols—single converter handles both standards reliably.
Metal housing packed in foam cradle. Delivery arrived undamaged. Website featured X-ray image of PCB layers. Construction feels rugged and well-assembled. Customer interaction included torque specs for terminals. Technical documentation covered conformal coating option. Built to last in demanding industrial applications—superior to plastic alternatives.
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