waveshare Industrial USB to RS485 Converter Extending USB to 4CH RS485, 1200bps ~ 460800bps Baudrate, Transmission Distance up to 1.2km, Compatible with Win7/8/8.1/10/11, Mac, Linux, Android,etc

• Industrial USB TO RS485 4-CHConverter, Extending USB to 4CH RS485, allows concurrent and independent communication for each channel.
• Onboard TVS (Transient Voltage Suppressor), effectively suppress surge voltage and transient spike voltage in the circuit, lightningproof & anti-electrostatic.
• Onboard resettable 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.
• Compatible with Mac OS, Linux, Windows 11 / 10 / 8.1 / 8 / 7, Android.
• 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.

Description
The USB TO 4CH RS485 is an industrial-grade USB to 485 non-isolated converter. It incorporates the CH344L and SP485EEN original chips, providing enhanced stability and compatibility. It features built-in lightning protection, a resettable fuse, ESD, and TVS protection circuits, all enclosed in an aluminum alloy casing design. This converter is suitable for various industrial control equipment or applications with demanding communication requirements.

Features
Extending USB to 4CH RS485, allows concurrent and independent communication for each channel
Onboard TVS (Transient Voltage Suppressor), effectively suppress surge voltage and transient spike voltage in the circuit, lightningproof & anti-electrostatic
Onboard resettable 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
Aluminium alloy case with oxidation dull-polish surface, CNC process opening, solid and durable, well-crafted

Specifications
1. USB
Operating voltage: 5V
Connector: USB-B
Protection: 500mA resettable fuse, ESD protection
Transmission distance: About 5m

2. RS485
Connector: Screw terminal
Protection: 600W lightningproof and surge-suppress, 15KV ESD protection
Transmission distance: Maximum communication distance is about 1200m (at a low rate, with 120R resistor turned on)
Transmission mode: Point-to-multipoints (up to 32 nodes, it is recommended to use repeaters for 16 nodes or more)

Operating environment: Temperature: -40 ~ 85℃. Humidity: 5%RH ~ 95%RH

Package Content
USB TO 4CH RS485 x1
USB type A to type B cable ~1.2m x1

Online Development Resources /User Manual ://bit.ly/3QxBxm8