Embedded USB High Speed 2.0 Serial Adapters by Quatech

Quatech Embedded USB Serial Adapters are designed to seamlessly connect multiple serial peripherals via a single USB port. This enables manufacturers and integrators to easily incorporate multiple serial interface devices such as keypads, displays, card readers, and printers into custom enclosures that lack native serial support without changing software written for serial port communications.

Available with one, four or eight independent ports, the small footprint boards have built-in surge suppression at each serial port, necessary for maximum reliability and robustness. Mounting holes allow easy installation into cabinets and kiosks. For maximum flexibility, each port on the 400 models can be configured as RS-232, RS- 422 or RS-485 in any combination, meaning a single adapter can be used to implement multiple full-duplex and half-duplex multi-drop networks.

Features

USB 2.0 version of Quatech's reliable Embedded USB Serial Adapters
1, 4 or 8 independent ports
USB to RS-232 or USB RS-232/422/485 (MEI) available
On 400 models, each port configurable for RS-232, RS-422 or RS-485
Device enumerates itself as standard port(s)
Full modem control and hardware and software flow control (RS-232)
Full-duplex or half-duplex modes (RS-232/422/485)
Bus powered, no external power required
Windows 2000/XP/Vista/7 and Linux support available
Surge suppression standard
RoHS compliant
5 year warranty
External USB Serial Adapters also available
Board Layouts: SSU2 QSU2 ESU2

	RS-232	RS-232/422/485
Bus Interface:	High Speed USB 2.0
OS Support:	Windows 2000/XP/Vista and Linux support available	Windows 2000/XP/Vista and Linux support available
Serial Ports Provided:	SSU:1 QSU:4 ESU:8	QSU:4 ESU:8
		Each port configurable as RS-422 or RS-485 for full or half duplex communication
USB Ports Required:	SSU:1 QSU:1 ESU:1	QSU:1 ESU:1
Data Rate:	up to 921.6 kbps	up to 921.6 kbps
UARTs:	1024-byte transmit and receive FIFOs
Transceiver:	SP211HB	MAX491 or compatible
RS-232 Output:	Voltage Swing: ±5V (min), ±7V (typ)	N/A
RS-232 Input:	Voltage Range: -15V (min), +15V (max)	N/A
	Input Threshold Low: 0.8V (min), 1.2V (typ)
	Input Threshold High: 2.4V (max), 1.7V (typ)
Differential Driver Output (50W Load):	N/A	+3.3V (max)
Differential Driver Output (27W Load):	N/A	+1.5V (min), +3.3V (max)
High Input:	N/A	+2V (min)
Low Input:	N/A	+0.8V (max)
Driver Rise/Fall Time:	N/A	5ns (typ), 20ns (max)
Driver Input to Output Delay:	N/A	20 ns (min), 40 ns (typ), 60 ns (max)
Receiver Input to Output Delay:	N/A	40 ns (min), 70 ns (typ), 100 ns (max)
Environment:	Operating: 0°C to 70°C
	Storage: -50°C to 80°C
	Humidity: 10% to 90%
IND Option:	Surge suppressor applied to each line that is capable of sustaining up to 40A peak, 8 x 20µs 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)
Power Requirements:	Bus-powered device, no external power supply required.
	Suspend power: < 500 µA
	Unconfigured power: < 100 mA
	Configured Power: < 500 ma
Size:	SSU2: 0.56” H x 3.87” W x 1.40 ” D
	QSU2: 0.72” H x 6.52 ” W x 5.20 ” D
	ESU2: 1.31” H x 6.52” W x 5.20 ” D
Connectors:	DB-9 male (see connector pinout)
Certifications:	CE, FCC Class B, RoHS & WEEE Compliant

Sales Information:

DIRECT FROM QUATECH
SSU2-100-EMB	1 port embedded USB 2.0 to RS-232 serial adapter, surge suppression standard	$49.00

QSU2-100-EMB	4 port embedded USB 2.0 to RS-232 serial adapter, surge suppression standard	$159.00

QSU2-400-EMB	4 port embedded USB 2.0 to RS-232/422/485 serial adapter, surge suppression standard	$179.00

ESU2-100-EMB	8 port embedded USB 2.0 to RS-232 serial adapter, surge suppression standard	$299.00

ESU2-400-EMB	8 port embedded USB 2.0 to RS-232/422/485 serial adapter, surge suppression standard	$339.00

Application: Banking Teller Station
Quatech Product Used: QSU-100-EMB Four Port Embedded USB to RS-232 Serial Adapter

A typical bank teller station is comprised of a number of peripheral devices such as CRTs, cash drawers, card readers, check printers, and keypads. These banking peripherals have historically used a standard serial interface to the host PC. However, as the number of expansion slots available in new PCs continues to shrink, banks are increasingly turning to USB as the peripheral interface of choice. If the bank were to replace the many thousands of serial peripherals it owns with USB-based peripherals it would require an extremely high capital expenditure.

Quatech embedded USB to serial adapters provide banks with an ideal solution. These adapters can connect up to 16 peripheral devices to a host PC via the USB port, allowing banks to continue to use their existing equipment while taking advantage of the benefits USB provides.