Industrial automation system, barcode scanner, Palm, PLC and PLD, PDA (WinCE system), label printer, POS system, data acquisition control system, security access control system, etc.
Functions and features:
●Single chip (ASIC) USB port to serial port communication
●RS-485 port common mode input voltage range is -7V~+12V
●Support Windows98/ME and Windows2000/XP
●Support MAC Apple and Linux v5.0
●Fully compatible with USB v1.1 and USB CDC V1.1 specifications
●USB full speed connection
●USB bus directly takes power, no external power supply is required
●Support automatic handshake protocol
●Up to 57.6kbps transmission rate within 1200m distance (up to 230kbps rate at short distance)
●Comply with the RS-485 standard of TIA/EIA
●Support remote wake-up and power management
●Support point-to-multipoint (up to 32 standard 485 devices can be connected to the RS-485 end)
note!
1. The RS-485 communication rate of USB TO 485 is affected by the communication distance. Generally, the longer the distance, the lower the communication rate. The simple correspondence table is as follows:
Communication distance 0~10m 300m 1200m 5000m
Rate (maximum) 230kbps 115kbps 57.6kbps 9600bps
(The values in the table are ideal. The specific communication rate will also be affected by the actual environment and may not reach the above values)
2. In theory, the RS-485 bus of USB TO 485 can connect up to 32 standard 485 devices, but due to the influence of load and communication distance, the actual maximum number of devices that can be connected may not reach this value (generally> 20 )
Connections and signals:
1. RS485/RS422 (DB9M needle) pin definition
DB9M 1 2 3 4 5 6 7 8 9
RS485 B A GND
Note: The pin number of the DB9 pin/hole header is marked on the connector
system requirement:
Before using USB TO 485, please make sure your computer is IBM PC compatible and has the following minimum system requirements:
? Intel compatible 486DX4-100 MHz CPU or higher
? A standard USB interface (4-pin) with a symbol
? The running operating system is Windows 98/Me or Windows 2000/XP
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