SW USB Series • Introduction
1-2
Introduction
PRELIMINARY
About this Manual
This manual describes the Extron SW2 USB, SW4 USB, and SW4 USB Plus switchers
and provides instructions on installing, configuring, and operating them. The term
“SW USB” is used throughout this manual to refer to all models.
About the SW USB Series
The Extron SW2 USB, SW4 USB, and SW4 USB Plus switchers make it possible for
two or four host computers to share and switch between up to four peripheral USB
devices such as mass storage devices, keyboards, mice, and other human interface
devices (HIDs). They function as USB hubs with switching and device emulation,
so that connections are maintained between host computers and peripherals.
Features
A number of specialized features help to streamline system integration, including
port status indication, RS-232 pass-through, front panel security lockout, and
multiple control points.
Outputs — Four female USB type A connectors act as a USB hub. Each port
supplies the 500 mA, 5 V rating required in the USB specication.
USB 2.0 compatibility — The SW USB switchers are backward compatible with all
previous USB data rate standards, including low speed (1.5 Mbps), full speed
(12 Mbps), and high speed (480 Mbps).
Mounting — The SW USB Series switchers have compact 1U high, ½-rack wide,
3 feet deep metal enclosures that can be mounted on a rack shelf or under or
through furniture.
Host and peripheral emulation — The SW4 USB Plus model offers increased
system reliability by providing an uninterrupted connection between host and
peripheral devices.
• Host emulation: When a keyboard or a mouse is connected to port 3 or
4 and the appropriate rear panel DIP switch is set to On, the SW USB
switches to the connected keyboard or mouse instantly. See “Host
emulation (SW4 USB Plus only),” in chapter 3, “Operation”, for more
information.
• Peripheral emulation: The SW USB provides problem-free boot-up
by constantly emulating a keyboard and/or mouse to the computer or
other input device, regardless of whether or not a keyboard or mouse is
actually connected.
Power supply — An external power supply is provided for worldwide
compatibility.
RS-232 control and pass-through — The SW USB switcher can be controlled via
SIS
™
(Simple Instruction Set) commands received via an RS-232 interface.
These SIS commands can be sent to an RS-232 controllable Extron A/V
switcher attached to the SW USB’s RS-232 Pass Thru port. (See chapter 4,
“SIS Programming and Control”, for an explanation of the available SIS
commands.)
(19 Seiten)
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