Specifications

Section 3 — Installation
!
The AFS-3 Audio Failsafe should be installed only by qualified technical personnel. An attempt to install
this device by a person who is not technically qualified could result in a hazardous condition to the
installer or other personnel, and/or damage to the AFS-3 or other equipment. Please ensure that proper
safety precautions have been made before installing this device.
3.1 System Includes
The Audio Failsafe package contains these items:
Audio Failsafe model AFS-3
12 volt AC wall-plug transformer
Operation Manual
3.2 Installing the Unit
The Audio Failsafe is designed to be placed almost anywhere. It generates little heat and can be mounted in just
about any convenient location where the ambient temperature does not exceed 120°F.
3.2.1 Screw-Terminal Connectors
All electrical connections to the Audio Failsafe are made through a pair of five position connectors on the rear panel.
Pluggable, screw-terminal connectors are supplied. Note that these can be removed from the panel by pulling them
straight out. This makes wiring and removal very easy.
3.2.2 Power Supply Connection
The Audio Failsafe is powered by 12 volts AC. The included wall-plug power transformer should be used. The leads of
this transformer should be stripped and connected to the terminals marked "12 VAC" on the rear panel of the AFS-3.
If the supplied transformer has a connector on the end of the wire, simply cut the connector off and discard it.
3.2.3 Audio Inputs
Audio connections are made to the AFS-3 through the screw-terminal connector on the left hand side of the rear
panel. There is an "A" channel input and a "B" channel input. Either one or both channels may be used. If two stereo
channels are connected to the inputs, note the polarity of the audio connections or signal cancellation will result. If
only one audio source is used, connect it to either input and leave the other input disconnected. The optional "Gnd"
terminal is connected to the internal circuit ground and it is not chassis ground.
AFS-3 Installation page 3.1