USB To Single Port RS-485 Converter

The ATC-820 is an Surge Protection USB to 1-Port RS-485 converter that is designed for PC, thin client, or server to provide instant COM port expansion via the Universal Serial Bus (USB). Supports Windows 95/98/Me, 2000, 2003, XP, Vista,Win7, CE, Linux.

The ATC-820 module is a cost-effective way to convert USB interface to RS-485 industrial buses. When connected to a PC USB port. The ATC-820 module is automatically detected and is installed as a native COM port which is compatible with any existing serial communication application.

The ATC-820 converter can be configured for RS485 two-wire (Half Duplex) networks. When operating in two-wire RS485 the data transfer control is automatically done by the converter.

The ATC-820 has a 384 byte receive buffer with an adjustable timeout and a 128 byte transmit buffer with auto-transmit control. The ATC-820 makes it easier to add RS-485 devices to your system with easy plug-and-play.


   ◆Using chip FTDI industry

   ◆Compatible with USB1.1, 2.0, the maximum rate can be up to 12 MBPS

   ◆Without setting location and IRQ, I/O and friendly user interface

   ◆Supports remote sensei and power management

   ◆A serial port transmission speed can reach 921.6 KBPS

   ◆Supports hot plug and PnP

   ◆Supports Windows 98 / ME / 2000 / XP / / 7/8 / CE/Vista, MAC and Linux 2.4.20

   ◆Interface electrostatic protection, signal lightning surge protection

interface characteristic Compatible USB1.0/1.1, 2.0, plug and play
interface form The USB type A mouth
velocity 12 Mbps (USB) at full speed
I/O address BIOS appoint
IRQ BIOS appoint
FIFO 64 bytes
serial interface
interface form DB9 needle
Baud rate 50 bps to 460.8Kbps  
data bits 5,6,7,8,
parity bit None, Even, Odd, Space, Mark
flow control XON/XOFF
Serial Signal
RS-485 485+ ,485-
 protection interface
ESD protect 15 kv esd protection, 1000 w lightning surge protection
Driver Support
supported operating systems

Windows (2000, XP x86/x64, 2003 x86/x64,Vista x86/x64), WinCE 6.0,

Linux 2.6 x86/x64

Mechanical Characteristics
body case ABS + PC plastic shell
weight 100 g (net weight)
size 60 x 35 x 17 mm (USB cable length is 1000 mm)
Work Environment
operating temperature 0 to 55°C (32 to 131°F) 
operating humidity 5 to 95% RH
storage temperature -20 to 70°C (-4 to 158°F)

Company products are widely used with the electric power, industrial control, telecommunications, commerce, banking, insurance, security, smart CARDS, and other industries, production and sales of the products of the company, supporting complete, cost-effective, timely and thoughtful service.ATC - 820 is a USB transfer RS - 485 interface converter, 600 w surge protector, protect the equipment from lightning.Products are widely used in the attendance, entrance guard, selling rice, monitor, car park management, and other fields.Good product not only implement different signal transformation, communication, also let your computer extend the serial port resources.

ATC-820 Products 1PCS
ATC-820user's manual 1PCS