High Speed USB Serial Adapters
Standard serial ports via USB 2.0 without replacing peripheral hardware
or application software
For over 20 years, Quatech has been
known to help you
Connect with
Reliability.
As we continue in the race to
become the industry leader, our high
performance device connectivity line
expands with the new high speed USB
2.0 Serial Adapters. The next generation
Quatech USB Serial Adapter hits speeds
of up to 921.6 kbps, 1024-byte FIFO and
hardware and software flow control.
Quatech
USB
Serial
Adapters
enumerate themselves as standard
COM ports that are compatible with all
standard RS-232 or RS-232/422/485
devices and software created for them.
With the industrial surge suppression
“IND” option, you can safeguard the USB
Serial Adapter. The “IND” option is ideal
for implementing USB-to-serial networks
in factories, power plants and other
potentially
harsh
industrial
environments.
USB 2.0 is fully
compatible with USB 1.1 devices. The
older devices work with the new bus,
and vice versa.
The 400 Series models introduce the
software-selectable RS-232/422/485
(Multi-Electrical Interface or MEI). The
MEI capability is available on all ports at
the click of a mouse. LEDs visually tell
you which ports are using which
protocol, so go ahead, mix and match.
Auto detect between RS-422 and RS-
485 with Quatech’s new USB Serial
Converter.
Embedded USB Serial Adapters for
custom enclosures
If you’re looking to seamlessly connect
multiple serial peripherals via a single
USB port in a custom enclosure, try
Quatech’s
board-level
solutions,
Embedded USB Serial Adapters.
KEY FEATURES
1, 2, 4 or 8 independent serial ports
RS-232 or software-selectable
RS-232/422/485
Compatible with USB 1.1
Plug-and-play capability
Devices enumerate themselves as
standard COM ports
Speeds up to 921.6 kbps
High speed UARTs with 1KB FIFOs to
boost data rates
Optional surge suppression package
(standard on Embedded products)
Full modem control and hardware and
software flow control
Bus powered: no external power required
Embedded (board-only) units also
available
Windows 2000/XP/Vista and Linux
RoHS compliant
NEW!
USB to RS-422/485 Converter
5 year warranty
Connect serial peripherals with USB
2.0 Serial Adapters
If speed, expansion and support are
what you’re looking for in a USB Serial
Adapter, think Quatech.
You can now broaden the range of
external peripherals used on your
computer at higher speed rates than the
USB 1.1 series, with the introduction of
the High Speed USB 2.0 Serial
Adapters. The USB 2.0 has more
bandwidth that allows higher data rates
on the serial ports for more efficiency.
The new High Speed USB Serial
Adapter line gives your laptop or
workstation the ability to communicate
between a USB port and up to eight RS-
232, RS-422, or RS-485 serial
peripherals. It adds the COM port(s) via
its USB connection and is compatible
with new and legacy RS-232 or RS-
232/422/485 devices. The USB Serial
Adapters are the ideal solution for a
variety of industries and applications
including banking, retail and industrial
automation where PCs have a
significantly shorter lifecycle than the
peripherals that use them.
Rev C
2/2008
5675 Hudson Industrial Parkway * Hudson, OH 44236
1.800.553.1170 * +1 330.655.9000 * www.quatech.com
HIGH SPEED USB 2.0 SERIAL ADAPTER SPECIFICATIONS
Ordering Information
Model
DSU2-100
DSU2-400
QSU2-100
QSU2-400
ESU2-100
ESU2-400
Ports
2
2
4
4
8
8
Interface
RS-232 with cable
RS-232/422/485 with cable
RS-232 with cable
RS-232/422/485 with cable
RS-232 with cable
RS-232/422/485 with cable
USB Ports Required
SSU:
1
DSU:
1
QSU:
1
ESU:
1
IND Option:
Surge suppression applied to each line that
is capable of sustaining up to 40A peak, 8 x 20ìs
transient surges, a clamping voltage of 30V and a peak
energy dissipation of 0.1 Joules.
(NOTE: The “IND” option limits data rate to
115.2 kbps)
Environment
Operating:
0° to 70°C
Storage:
-50° to 80° C
Humidity:
10% to 90%
Power Requirements
Bus-powered device, no external power supply required
Suspend power:
< 500 ì A
Unconfigured power:
< 100 mA
Configured power:
< 500 mA
Size
SSU: 3.6” L x 1.7” W x 1” H
DSU/QSU: 9.18” L x 5.25” W x 1.675” H
ESU: 9.18” L x 5.25” W x 2.363” H
Connectors
DB-9 male
Certifications
CE, FCC Class B, RoHS & WEEE Compliant
UARTS
1024-byte FIFOs for transmit and receive
Transceiver (RS-232/422/485)
MAX491 or compatible
Differential Driver Output (50Ù Load):
+2V (min), +3.3V (max)
Differential Driver Output (27Ù Load):
+1.5V (min), +3.3V (max)
High Input:
+2V (min)
Low Input:
+0.8V (max)
Driver Rise/Fall Time:
5ns (min), 20ns (typ), 25ns
(max)
Driver Input to Output Delay:
20ns (min), 40ns (typ),
60ns (max)
Receiver Input to Output Delay:
40ns (min), 70ns
(typ), 100ns (max)
RS-232 Output
Voltage Swing:
±5V (min), ±5.4V (typ)
RS-232 Input
Voltage Range:
-15V (min), +15V (max)
Input Threshold Low:
0.6V (min), 1.0 (typ)
Input Threshold High:
2.4VV (max), 1.5 (typ)
Bus Interface
USB 2.0 High Speed
OS Support
Windows 2000/XP/Vista and Linux support
Data Rate
Up to 921.6 kbps (max)
Serial Ports Provided
SSU:
1
DSU:
2
QSU:
4
ESU:
8
(For 400 models, each configurable as RS-232, RS-
422 or RS-485 for full or half duplex communication)
Retail Application
Banking Application
High Speed Modem
Multiport USB to
RS-232 Serial Adapter
Central Bank Server at
Remote Location
Branch Host PC
RS-232
RS-232
Teller Station 1
Teller Station 2
5675 Hudson Industrial Parkway * Hudson, OH 44236
Rev. C
2/2008
1.800.553.1170 * +1 330.655.9000 * www.quatech.com
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