HIGH SPEED USB 2.0 SERIAL ADAPTER SPECIFICATIONS
5675 Hudson Industrial Parkway * Hudson, OH 44236
1.800.553.1170 * +1 330.655.9000 * www.quatech.com
Rev. C
2/2008
Ordering Information
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)
USB Ports Required
SSU:
1
DSU:
1
QSU:
1
ESU:
1
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)
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
Model
Ports
Interface
DSU2-100
2
RS-232 with cable
DSU2-400
2
RS-232/422/485 with cable
QSU2-100
4
RS-232 with cable
QSU2-400
4
RS-232/422/485 with cable
ESU2-100
8
RS-232 with cable
ESU2-400
8
RS-232/422/485 with cable
Retail Application
Banking Application
High Speed Modem
Central Bank Server at
Remote Location
Multiport USB to
RS-232 Serial Adapter
Branch Host PC
RS-232
RS-232
Teller Station 1
Teller Station 2
