RoHS Compliant
Features
USB 2xRS422/485
Accessories
Description
ORDER
Description Code
USB 2xRS422/485 US-313
US-313
Software
USB to Serial providing two RS422/485 serial ports. Up to 921,600 data transfer rates and the 128 byte
deep transmit and 384 byte receive FIFOS, coupled with 1Mbit line drivers deliver uncompromising
performance on your laptop/PC.
USB to serial is the quick low cost way to connect your computer to a serial comms enabled device.
Boost software gives industry leading functionality and compatibility.
RS422 Standard: RS422 allows one transmitter and up to 10 receivers with data transmitter rates up
to 10 megabits per second for distances up to 40 feet and up to 100 Kilobits per second for distances
up to 4000 feet (1219 metres).To achieve good long distance noise immunity, 2 wires are used to carry
each signal, configured as a twisted pair of cables. The TXD pair and RXD pair are used to carry the data
whilst the RTS pair and CTS pair lines are used for handshaking. Thus 2 twisted pairs are used without
handshaking and 4 twisted pair cable is used with handshaking both these schemes allow full duplex
data communications.
RS485 Standard: RS485, based on the RS422 standard allows up to 32 driver/receivers pairs on a
party line data bus. Whilst only one of these should be transmitting data at any time, the rest can all
simultaneously listen to the data. Handshaking is performed by software protocol. Two twisted pairs
form a full duplex system. Often only one twisted pair cable is used as the TXD and RXD lines are tied
together; this is known as half duplex mode. Traditionally, the RTS signal is used as the party line control
to tristate the PC’s transmitter, but in multitasking operating systems like Windows or Linux the only
reliable method is hardware autogating. Brainboxes RS422/485 products implement a state of the art
autogating circuit thus ensuring error free communications in half duplex configuations.
These products do away with traditional issues with USB technology so you can buy with confidence!
With Brainboxes industry renowned Lifetime Warranty and Lifetime Support!
2 port • RS422/485
USB to Seria• l
12• 8 Byte Tx and 384 Byte Rx FIFOs
Up to • 921,600 Baud
2x• DB9 connector (9 Pin Male)
Drivers for all popular operating systems•
Sample Programs, Test & Terminal software•
Lifetime Support•
Lifetime Warranty (registration required)•
Supplied with USB Cable•
Side hinges to allow DIN rail mounting•
NEW
MK-048:
DIN-Rail mounting kit for
1 & 2 Port ES/US
“SERIAL CARDS ENGINEERED TO EXCEED EXPECTATIONS”
Microsoft signed drivers (easy installation & robust operation) for:
Windows 7 32 bit and 64 bit edition• s
Windows Vista 32 bit and 64 bit edition• s
Windows XP 32 bit & 64 bit edition• s
As well as: full product documentation, a thorough troubleshooting guide and terminal software. Detailed
sample source code for many popular programming languages. Further OS support on next page.
+44(0) 151 220 2500 | sales@brainboxes.com | www.brainboxes.com
USB 2xRS422/485
US-313: Full Specification
Port Ports 2 x RS422/485
Connector 2xDB9 connector (9 Pin Male)
FIFO size 384 RX FIFO + 128 TX FIFO
Operating Distance RS422/485 Standard (4000 ft : 1200 metres)
Cable USB Cable
Port Settings Baud Rate 921,600
921,600
baud
Data Bits 7 or 8
Parity Odd, Even, None, Mark or Space
Stop Bits 1 or 2
Flow Control RTS/CTS, XON/XOFF
Tx/Rx Modes Full Duplex, Half Duplex Autogating
Interface OS Compatibility Windows 7 32 bit & 64 bit Editions
Windows Vista 32 bit & 64 bit Editions
Windows XP 32 bit & 64 bit Editions
BUS USB
Approvals Other Approvals WEEE RoHS EMC: CE Microsoft Certified Gold Partner
Microsoft Approvals Microsoft Certified Gold Partner
Windows 7 32 bit & 64 bit editions
Windows Vista 32 bit & 64 bit editions
Windows XP 32 bit & 64 bit editions
General PCB Layers 4
Power Consumption 180mA
Weight 0.385 Kg
Size 100 x 105 x 26 mm
Box Content Packaging Installation CD including manual, Microsoft signed drivers & utilities
Device USB 1xRS422/485
Product Support Warranty Lifetime (online registration required)
Support Lifetime Web, Email and Phone Support from fully qualified, friendly
staff who work in and alongside the Product Development Team
Additional OEM option Available for bulk buy OEM
Made in the UK
Made In Manufactured in the UK by Brainboxes Winner 2005 European
Electronics Industry Awards “Manufacturer of the Year”
Customisable Brainboxes operate a “Perfect Fit Custom Design” policy for volume
users. More Info: sales@brainboxes.com
Datasheet Version: 3.28 Published on: 2009/6/26
US-313
+44(0) 151 220 2500 | sales@brainboxes.com | www.brainboxes.com