USB to RS485/422 Interface Converter

BD-USB-485/422 interface converter with magnetic FTDI chip 1.8MPerformance Parameters

1. Meet USB1.0,1.1,2.0 standards;

2. comply with EIA RS422, EIA RS485 standard

3.USB signal: VCC, DATA-, DATA +, GND.FG

4.RS-422 signal: T / R +, T / R-, RXT +, RXD-, GND; RS-485 signal: T / R +, T / R-.GND

5.RS-422 Work: Full-duplex bi-directional point-to-many communication

6.RS-485 Work: point half-duplex two-way communication for many

7. Maximum transmission distance: USB port does not more than five meters, RS-422/485 terminal 1200 m (9600bps time)

8. Transmission media: twisted pair or shielded cable

9. Load capacity: RS-422, up to 10, including the main equipment; RS-485, up to 32

10. Baud rate: 300 baud to 921600baud automatically detect the serial transfusion rate;

11. Flow control: none, hardware and xon / xoff

12. Interface protection: Surge protection, ± 15KV electrostatic protection

13. The signal indicator: Send (TXD), receive (RXD), power (POWER)

14.USB cable with magnetic shielding, can be anti-interference;

15. Working environment: -40 to 85⁰C

Connector and Signal

DB9 male, RS-422 / RS485 output signals and terminals pin definitions

1. The four-wire full-duplex point to point

2. multipoint four-wire full-duplex

3. The two-point half-duplex

4. Double-multipoint half-duplex

Converter as full or half duplex connection, in order to prevent reflections and interference signals, you need to pick a matching line of terminal resistor (parameters: 120 ohm 1 / 4W)