Device Serial Server - RS - 485 / 422 to USB Converter
Developing by PC industry, USB interface replacing many kind of old PC interface step by step. However, many types of important equipment still use RS-422/RS-485 interface, in order to transfer the data between PC and RS-422/RS-485 interface. That’s why we need to use USB/RS-422/485 converter.
BF-850 is a converter in common use; it does not need extra power. It also conforms to the standard of USB, RS-422 and PR-485, and be able to transfer USB signal to RS-422 or RS-485 signal. There has no delay automatic transfer inside, the unique I/O electric auto-control the direction of data transfer, and need no handshake signal (like RTS, ETR) to transfer with full duplex (RS-422) and half duplex (RS-485).
BF-850 can provide the reliable connection between point to point and point to multi-points. In point to multi-points each converter can connects 32 units of RS-422 or RS-485 interface equipment. The speed of data transfer is 300~921600 bps and the communication types are USB to RS-422, USB to RS-485.
- Standard: Conform to the standard of USB V1.1, EIA RS-485, RS-422.
- USB signal: VCC, DATA+, DATA-, GND, FG
- RS-485 signal: T+, T-, GND
- RS-422 signal: T+, T-, R+, R-, GND
- Communication type: Asynchronous communication, Point to point or point to multi-points, 2 lines of halt-duplex, 4 lines of full-duplex.
- Communication control: use auto-control technology to transfer the data, automatic determine and control the direction of data transfer.
- Baud Rate: 300~921600 bps, automatic detect the serial port speed.
- Load ability: In point to multi-points each converter can connects 32 units of RS-422 or RS-485 interface equipments.
- Communication distance: RS-422/RS-485 5000 meter (9600 bps), USB less than 5 meter
- Type of communication line：Double twist line or cover line.
- Communication speed: 921600 bps 300 M 38400 bps 2.4 KM 9600 bps 5 KM
- Support Windows95/98/2000/xp
- Surge Protection: 15 KV ESD for all signals
- Operation environment: -25 ~ 70℃, humidity 5% ~ 95%
- Power Supply: USB 30 mA @DC5V
- Weight: 80g.
- Dimension: 55 × 36 × 18 mm
| RS-422/RS-485 export signal | |||
|---|---|---|---|
| DB9 PINS | Output | RS-422 Duplex | RS-485 Half Duplex |
| 1 | T/R+ | Transfer(A+) | RS-485(A+) |
| 2 | T/R- | Transfer(B-) | RS-485(B-) |
| 3 | RXD+ | Receive(A+) | Empty |
| 4 | RXD- | Receive(B-) | Empty |
| 5 | GND | Ground | Ground |
| 6 | N/A | ||
| 7 | N/A | ||
| 8 | N/A | ||
| 9 | N/A |
Main Products:
Fingerprint Reader, Fingerprint Controller, Proximity Reader, Lan Control, Device Serial Server Manufacturer, Web-Based Access Control & Time Attendance Solution, Industrial Serial Server
