Features
Support USB to RS485 bidirectional conversion
Fast communication, stable and reliable, better compatibility
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
3 LEDs for indicating the power and transceiver status
Support Multi system：Linux, Android, WinCE, Win11/10/8.1/8/7/XP, etc.

Specifications

PRODUCT TYPE : Industrial Grade USB to RS485 converter
Host port: USB
Device port: RS485
Baudrate:300bps ~ 3Mbps

USB

Operating voltage : 5V
Connector: USB-A
Protection: 200mA self-recovery fuse, ESD protection
Transmission distance: About 5m

RS485

Connector:Screw terminal
Pins :A+, B-, GND
Direction control :Hardware automatic control
Protection: 600W lightningproof and surge-suppress, 15KV ESD protection (onboard 120R balancing resistor)
Transmission distance:About 1.2km(low rate)
Transmission mode:Point-to-multipoints (up to 32 nodes, it is recommended to use repeaters for 16 nodes or more)

LED indicators

PWR :Red power indicator, light up when there is USB connection and voltage is detected
TXD:Red TX indicator, light up when the USB port sends data
RXD :Red RX indicator, light up when the device ports send data back

Operating environment

Temperature: -15℃ ~ 70℃
Humidity :5%RH ~ 95%RH

Online Document/Development Resource: waveshare.com/wiki/USB_TO_RS485_(B)?Amazon

Package Content

USB TO RS485 (B) x1
USB-A male to female cable x1
Screwdriver x1