Niles Audio SAS-1 - Manual (Page 4)

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OPERATION
There are two ways to trigger the SAS-1 switch: a signal sensing mode (1) and a voltage control
mode (2).
1. In the signal sensing mode, the SAS-1 automatically switches from A to B when a
signal is present at input B. A sensitivity control is provided for setting the amount
of input level (trigger threshold) needed to activate the switch. The B input will
have priority as long as a signal remains at its input. Depending upon the setting
of the delay control, the unit switches from B back to A anywhere between ¼ of a
second to 30 seconds after the trigger signal (input B) is removed. The SAS-1 can
be programmed to trigger from the speaker-level, line-level or video sources. At DIP
switch is provided for the programming.
2. In the voltage control mode, applying 5 to 24 volts AC or DC to the control input
connector will trigger the SAS-1 to switch. There are several ways this feature can
be used:
a) An included wall mount, 16Volt AC transformer (Part# XF00008) can be used
as the control voltage source. Plugging the AC transformer into the switched
AC outlet of an AM/FM receiver will trigger the SAS-1 to switch every time the
receiver is turned on.
b) A toggle switch wired between the output of the AC transformer and the “Control
IN” jack can be used as a manual trigger.
c) Any voltage source between 5 to 24 Volts AC or DC can be used to activate the
SAS-1. For example, a 12Volt control signal from a home automation system can
trigger the SAS-1.
A control output connector is also provided. It has four screw terminals and provides two
different outputs. Two of the terminals provide a set of normally open, dry relay contacts and the
other two provide 12Volt DC output.
The set of dry contacts “close” whenever the switching section of the SAS-1 is activated. They
will remain “closed” as long as the signal that triggered the SAS-1 is present. Depending on the
setting of the delay control, they will “open” anywhere between ¼ of a second to 30 seconds
after the signal that triggered the SAS-1 is removed. With this feature, the SAS-1 can activate
television lift systems, operate electric projector screens, control lighting systems, etc.
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