5675 Hudson Industrial Parkway, Hudson, OH 44236
1.800.553.1170
●
+1.330.655.9000
●
www.quatech.com
USB SERIAL ADAPTER SPECIFICATIONS
Bus Interface
USB 1.1, USB 2.0 compatible
Ordering Information
Surge Suppression: Surge suppression applied
to each line that is capable of sustaining up to
40A peak, 8 x 20
ì s
transient surges, a clamping
voltage of 30V and a peak energy dissipation of
0.1 Joules. Surge suppression is not available
with SSU-100-EMB.
Communication Modes
Full-duplex, half-duplex using RTS, Half-duplex
using DTR, Half-duplex automatic transmitter
control.
RS-422/485 Differential Driver Output
(
27
Ù
Load):
+1.5V (min), +5V (max)
High Input: +2V (min)
Low Input: +0.8V (max)
Driver Rise/Fall Time: 5ns (min), 15ns (typ),
25 ns (max)
Driver Input to Output Delay: 10ns (min), 30ns
(typ), 60ns (max)
Receiver Input to Outpul Delay: 20ns (min),
90ns (typ), 150ns (max)
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
QSU: 0.56”H x 6.90”W x 4.00”D
ESU: 1.31”H, 6.52”W x 4.80”D
Connectors
DB-9 male
Certifications
CE, FCC Class B
Rev 2.0, 1-2007
OS Support
Windows 98/Me/NT/2000/XP/Vista
SunRay Server (SSU/QSU-100)
Linux
Data Rate
115.2 (max)
Serial Ports Provided
QSU:4
ESU:8
(For 200/300 models, each configurable as RS-
422 or RS-485 for full or half duplex
communication)
USB Ports Required
QSU:1
ESU:1
UARTs
16550 UARTs with 16-byte FIFOs (1 per port)
Transceiver (RS-232)
SP211HB
Transceiver (RS-422/485)
MAX491 or compatible
RS-232 Output
Voltage Swing:
±
5V (min), ±7V (typ)
RS-232 Input
Voltage Range: -15V (min), ±15V (max)
Input Threshold Low: 0.8V (min), 1.2V (typ)
Input Threshold High: 2.4V (max), 1.7 (typ)
Pinouts & Board Layouts
Model Ports Interface
QSU-100-EMB 4 RS-232 w/ cable
ESU-100-EMB 8 RS-232 w/ cable
QSU-200/300-
EMB 4 RS-422/485 w/ cable
DB9-M Pinout (RS-232 for Q/ESU-100-EMB)
Board Layout for ESU Models
Board Layout for QSU Models
DB9-F Pinout (RS-422/485 for
Q/ESU-200/300-EMB)
