User guide

SW USB Series • Introduction 2
• RS-232 control and pass-through — The SW USB switcher can be controlled by
Simple Instruction Set (SIS
™
) commands received via an RS-232 interface. These SIS
commands can be sent to an RS-232 controllable Extron AV switcher attached to the
SW USB RS-232 Pass Thru port (see the “SIS Programming and Control” section for
an explanation of the available SIS commands).
• Contact closure control — Connecting a push-button contact closure device to the SW
USB Contact port or shorting pin 1, 2, 3, or 4 to the ground (
_
) pin of the Contact port
provides an alternative method of input selection on the SW USB. Commands issued via
contact closure can also be passed through the RS-232 Pass Thru port to an attached
RS-232 controllable Extron switcher (see “Setting Up Contact Closure Control” in the
“Installation” section for more information).
• Hot key switching — (SW4 USB Plus only) When host emulation is enabled, inputs can
be selected by a combination of key presses on a keyboard connected to port 3 or 4.
• Front panel security lockout (executive mode) — To prevent unauthorized access
to the switchers, front panel lock mode can be enabled via front panel controls or SIS
commands to disable all front panel controls.
• Port status LEDs — The Active USB LEDs provide visual indication of port status and
activity for USB peripherals and all connected and active host devices.
Application Diagrams
The following diagrams show examples of how an SW USB Series switcher can be
connected.
USB SWITCHING INPUT
Tx
Tx Rx
RS-232
CONTACT
1
2
3
4
RS-232
PASS THRU
USB OUTPUT HUB
USB 3
USB 1
PC 1
PC 2
PC 3
PC 4
USB 2
USB 4
0.4A MAX
12V
POWER
+
AAP 102
AUTO
SWITCH
USB OUT 1
USB OUT 2
USB 101 Rx
Extron
SW4 USB
USB Switcher
USB
Interactive White Board
USB
USB
VTR001 AAP
Video:
RED
Channel
Horizontal
Sync
Pulse
Active Video
PC PC PC PC
Figure 1. Connection Diagram for an SW4 USB Switcher with Interactive White
Board