Do you need a driver for this?

Hi,Yes, you can get the Driver installation from our wiki link: https://www.waveshare.com/wiki/USB_TO_RS485

Connecting to a conductivity system (analog eval-cn0359-eb1z) power led comes on, yet neither transceiver led. are drivers needed? can i test system?

Hi,please check this way: 1) Disconnect the connection with analog eval-cn0359-eb1z first, send data to the host computer, and check whether TXD is on. 2) Try to test another USB port . 3) Change to another host computer and check whether the TX or RX lights are normal.

I need this to control the “iot relay”, but since the usb ports are always powered, how can i control the on/off effect with this usb adapter?

This is a RS485 serial port adapter, the serial port is always on. If you have a RS485 relay module, the module will alway be on to, that module will control a relay, that it turns on and off by command over the RS485 serial connection.

Will this work with the usb 2.0 on an rpi 3b? currently, when i hook plug it in, the os finds the adapter but then crashes the rs485 bus.

Hi,it can work with the usb 2.0 on an rpi 3b. If it is crushed ,it can be caused by low electricity

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USB to RS485 Converter Industrial Adapter Original FT232RL and SP485EEN Fast Communication Embedded Protection Circuits Resettable Fuse ESD Protection

USB to RS485 Converter Industrial Adapter Original FT232RL and SP485EEN Fast Communication Embedded Protection Circuits Resettable Fuse ESD Protection

Product ID: 180602818

Details

Brand
waveshare
Color
FT232RL
Compatible Devices
PC Industrial
Connector Type
Lightning
Item dimensions L x W x H
1.2 x 0.7 x

⚡Onboard TVS for surge & lightning protection

📡1.2km RS485 transmission range

🔌FT232RL & SP485EEN chips for rock-solid comms

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993818₫

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Sold byAmazon VietnamDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Details

Brand
waveshare
Color
FT232RL
Compatible Devices
PC Industrial

Description

⚡ Power your industrial network with unstoppable, surge-proof speed!

BUILT IN SURGE ARMOR - TVS and resettable fuse protect your setup from voltage spikes and electrostatic shocks.
PLUG PLAY SIMPLICITY - Compact design with lightning connector type makes setup effortless—get connected and stay connected.
LONG DISTANCE POWERHOUSE - Supports RS485 communication up to 1.2km—perfect for sprawling industrial networks.
INDUSTRIAL GRADE STABILITY - Original FT232RL & SP485EEN chips ensure ultra-reliable bidirectional data flow.
CROSS PLATFORM COMPATIBILITY - Seamlessly works with Linux, Android, Windows (XP to 11), and WinCE for ultimate flexibility.

The Waveshare Industrial USB to RS485 Converter leverages original FT232RL and SP485EEN chips to deliver stable, high-speed bidirectional communication up to 921600bps. Engineered with onboard transient voltage suppression, resettable fuses, and protection diodes, it safeguards your devices against surges and electrostatic shocks. Supporting multiple operating systems and enabling RS485 transmission distances up to 1.2km, this compact adapter is the go-to solution for professional-grade industrial control and monitoring applications.

Specifications

ASIN	B081MB6PN2
Best Sellers Rank	#10 in Serial Adapters #1,992 in Computer Cables & Interconnects
Brand	waveshare
Color	FT232RL Version
Compatible Devices	PC, Industrial Control Equipment
Connector Type	Lightning
Current Rating	200 Milliamps
Customer Reviews	4.6 out of 5 stars 450 Reviews
Finish	Finish
Finish Type	Finish
Input Voltage	5 Volts
Item Dimensions	1.2 x 0.7 x 0.11 inches
Item dimensions L x W x H	1.2 x 0.7 x 0.11 inches
Manufacturer	Waveshare
Mfr Part Number	Industrial USB to RS485 Converter
Model Number	Industrial USB to RS485 Converter
Number of Items	1
Number of Ports	1
Package Quantity	1
Power Plug Type	No Plug
Smart Home Compatibility	Not Smart Home Compatible
UPC	750904070769 778365986825
Unit Count	1 Count

Reviews

E**Y

10.04.2026

K**I

17.04.2025

R**Y

5.01.2026

V**P

5.01.2026

S**S

19.11.2024

M**S

18.02.2025

R**B

14.10.2025

A**L

28.07.2025

M**R

11.05.2022

と**ん

11.01.2026

R**S

28.03.2026

M**S

1.01.2026

M**O

11.02.2024

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