Issuing Commands To An Extron Av Switcher Via The Rs-232 Pass Thru Port - Extron electronics SW USB Series User Manual

Using a jumper wire: On the Contact port, use a jumper wire to connect the
•
ground (_) pin to one of the other pins in the Contact connector (the ground [_] pin is
pin 3 for SW2 and pin 5 for SW4 models). Connecting pin 1 to ground selects input 1,
pin 2 selects input 2, and so forth.
• Using an IR 102: See the IR 102 User's Manual to use the IR 102 with a switcher.
Selecting an input on an AV Switcher via contact closure
To make input selections on a connected AV switcher via contact closure, you must
place the SW USB in loop 0 mode. When the ground pin of the Contact port is connected
to one of its other pins by by one of the methods described on the previous page, the
SW USB sends the input selection SIS command X! ! (where X! is the input number)
through the RS-232 Pass Thru port to the AV switcher. The AV switcher then switches to
the selected input (see "Issuing Commands to an Extron AV Switcher via the RS-232 Pass
Thru Port," below.
Selecting an input using SIS commands
You can also select an input via an RS-232 connection using SIS commands (see
SIS Programming and Control
and their explanations). If an Extron AV switcher is connected to the RS-232 Pass Thru port,
the SIS commands that you enter can also be passed through to the connected switcher,
even if the connected switcher has more inputs than the SW USB (see "Issuing Commands
to an Extron AV Switcher via the RS-232 Pass Thru Port," below).
Selecting an input using the keyboard (SW4 USB Plus only)
When a keyboard is connected to an emulation port and the keyboard emulation
DIP switch (switch 2) is set to On, you can switch to a desired input by pressing
<Ctrl> + <Shift> + <input number> (for example, to switch to input 3, press
<Ctrl> + <Shift> + <3>).
See Host emulation (SW4 USB Plus only)
setting up the SW4 USB Plus for host emulation.
NOTE: If you want to use the <Ctrl> + <Shift> + <input number> key combination
for another purpose, you can disable the keyboard switching feature using the SIS
command E H X@ USBC } (see

Issuing Commands to an Extron AV Switcher via the RS-232 Pass Thru Port

To configure the SW USB to pass commands through the RS-232 Pass Thru port to a
connected AV switcher, you must select a loop mode. The loop mode determines which
types of commands are passed through this port. The two loop modes are:
• Loop 1 mode — In this mode, SIS commands sent to the SW USB via an RS-232
interface are passed through the RS-232 Pass Thru port to the AV switcher. The RS-
232 interface is the only method of issuing commands to the AV switcher.
• Loop 0 mode (default) — In this mode, in addition to passing through SIS commands
sent from the computer RS-232 interface, the SW USB also passes input selections
entered via contact closure or the front panel buttons through the RS-232 Pass Thru
port to the AV switcher.
NOTE: You can issue commands to the SW USB using the front panel buttons,
RS-232, or contact closure in both loop modes. The loop mode selection affects only
commands going through the RS-232 Pass Thru port to the AV switcher.
starting on page 27 for a list of available SIS commands
starting on page 20 for information on
Hot Key Switch Commands
SW USB Series • Operation
on page 29).
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