USB-8COMi-RM USB to Octal RS-232/422/485 Adapter

The USB-8COMi-RM USB-to-Octal RS-232/422/485 Serial Adapter is designed to

make serial port expansion quick and simple. Connecting to a USB port on your

computer or USB hub, the USB Serial Adapter instantly adds eight RS-232, or

RS-422, or RS-485 serial communication ports to your system. By taking advantage

of the USB bus, the USB Serial Adapter makes it easier than ever to add serial ports

and serial devices to your system with easy plug-and-play and hot plug features.

By plugging the USB Serial Adapter to the USB port, the adapter is automatically

detected and installed. There are no IRQ & COM port conflicts, since the ports dont

require any additional IRQ, DMA, memory as resources on the system. The adapter

is self-powered, and has built-in switching power supply of 100V/240V (input) inside

the chassis.

The adapter is designed with eight external 4-pin dip switches to set RS-232, RS-422

or RS-485 mode conveniently, without the need to open the metal chassis. Each

port can be independently set to RS-232, RS-422, or RS-485, depending on your

requirement in application. The adapter is with DIN rail bracket for industrial

environment. The adapter can be also mounted to a 19 rack, and the rack mount

kits are included with the adapter. Termination and biasing option are available for

data transmission lines.

The USB-to-Octal RS-232/422/485 Adapter provides instant connectivity to RS-232,

RS-422, RS-485 communication devices for POS, factory automation equipment,

multi-drop data collection devices, bar code readers, time clocks, scales, data entry

terminals, PC to PC long distance communications, ATMs and serial communication

in harsh environments. The USB-8COMi-RM USB to Industrial I/O provides industrial

solution requiring single node or multi-drop communications over short and long

distance. Complete drivers support Windows XP, 2003, 2000, ME and 9x.

Features & Specification

Model No.: USB-8COMi-RM

Adds eight RS-232, or RS-422, or RS-485

serial ports by connecting to USB port

Installed as standard Windows COM port

Full RS-232 modem control signals

RS-232 data signals: TxD, RxD, RTS, CTS,

DSR, DTR, DCD, RI, GND

RS-422 data signal: Tx-, Tx+, Rx+, Rx-,

GND, RTS-, RTS+, CTS+, CTS-

RS-485 data signal:

4-wire: Tx-, Tx+, Rx+, Rx-

2-wire: data-, data+

FIFO: 128 byte transmit buffer

384 byte receive buffer

Serial port speed up to 230K bps

Eight DB9 male connector

Full hardware and software flow control

Automatic transmit buffer control for 2-wire RS485 half-duplex operation

ESD surge protection (15KV)

Monitor LEDs of Power, TxD, RxD indicating power & port status

Four external dip switches for easy RS-232, RS-422, RS-485 mode settings

-no need to open chassis to set different modes

-RS-232 mode: OFF, ON, ON, ON

-RS-422 mode: 4-wire with handshaking ON, ON, ON, ON

-RS-485 mode: 4-wire full duplex ON, OFF, ON, ON

-RS-485 mode: 2-wire half duplex with echo ON, OFF, OFF, ON

-RS-485 mode: 2-wire half duplex without echo ON, OFF, OFF, OFF

Serial Communication Parameters

-Parity: None, Even, Odd

-Data bits: 7, 8

-Flow control: RTS/CTS

Built-in 120 Ohm termination resistors for Tx/Rx/CTS termination

Built-in 750 Ohm biasing resistor for Tx/Rx biasing

USB cable of 0.9 meter included

Built-in switching power supply of 100V~240V

Easy plug & play installation and RS-232/RS-422/RS-485 device connection

Works with USB 1.1 & 2.0 host port

SECC sheet metal chassis with DIN rail bracket

Dimensions: 257 mm x 152 mm x 44 mm

277 mm x 152 mm x 44 mm (with DIN rail bracket)

COM Port Number can be changed to COM1 to COM4 to support HyperTerminal,

or any other COM port number required

Supports Windows XP, 2003, 2000, ME and 9x.

User Guide