Waveshare Industrial USB TO 4Ch RS485 Converter Module (B) with CH344L Chip,Universal Serial Communication,Multiple Protection Circuits,Compatible with Mac, Linux, Android, Windows 11/10 / 8.1/8 / 7

• Adopts original CH344L chip, fast communicating, stable and reliable, better compatibility,Supports USB to 4-ch isolated RS485, convenient for expanding multiple RS485 industrial serial devices
• Onboard unibody power supply isolation, provides stable isolated voltage, needs no extra power supply for the isolated terminal.Onboard unibody digital isolation, allows signal isolation, high reliability, strong anti-interference, low power consumption
• Onboard TVS (Transient Voltage Suppressor), effectively suppress surge voltage and transient spike voltage in the circuit, lightningproof & ESD protection.Onboard self-recovery fuse and protection diodes, ensures the current/voltage stable outputs, provides over-current/over-voltage proof, improves shock proof performance
• Onboard RS485 output terminal 120R resistors, enabled/disabled via DIP switch
• 10 LEDs for indicating the power, device configuration status and transceiver status.Industrial grade metal case, supports wall-mount & rail-mount installation, solid and beautiful, easy to install

Industrial Isolated USB To 4-Ch RS485 Converter (B), CH344L Chip, Multi Protection Circuits, Multi Systems Support, Aluminium Alloy Case, Wall-Mount & Rail-Mount Support
Features
1.Industrial Isolated USB To 4-Ch RS485 Converter (B)
CH344L ,Stable Transmission,Multiple Devices Applicable,Multi-OS Compatible

2.Safer Isolated Design
Onboard unibody power supply isolation, provides stable isolated voltage, needs no extra power supply for the isolated terminal
Onboard unibody digital isolation, allows signal isolation, high reliability, strong anti-interference, low power consumption

4.Multiple Protection, Safe And Stable
Onboard TVS (Transient Voltage Suppressor), effectively suppress surge voltage and transient spike voltage in the circuit, lightningproof & ESD protection.
Onboard self-recovery fuse and protection diodes, ensures the current/voltage stable outputs, provides over-current/over-voltage proof, improves shock proof performance.

5.Multi System Support
Supports Mac, Linux, Android, Windows 11 / 10 / 8.1 / 8 / 7, Etc.

6.Transmission Distance Up To 1.2km
The USB Signal Can Be Converted Into 4 Balanced Differential RS485 Signals And The Transmission Rate Is Stable. The Reliable Speed Is 1200~460800bps,
The Transmission Distance Is About 1.2km For RS485, And About 5 Meters For USB

7.Aluminium Alloy Enclosure
Aluminium Alloy Enclosure With Sand Blasting And Anodic Oxidation,
Solid And Durable, Fashionable And Good Hand Feeling
Wall-Mount & Rail-Mount Support, More Flexible For Industrial Installation

Development Resources
https://www.waveshare.com/wiki/USB_TO_4CH_RS485_(B)?Amazon

Package Content
USB TO 4CH RS485 (B) x1
Rail-mount buckle x1
USB type A to type B cable ~1.2m x1
Screwdriver x1