IR Photorelay Alarm  (490-0310)        Features         Faxback Doc. # 8662

The Radio Shack Safe House Infrared Photorelay/Alarm sounds a tone
any time something blocks its invisible infrared beam.  You can use
the alarm across a doorway or any opening up to fifty feet wide.

The alarm is virtually unaffected by room lights, indirect sunlight,
or other light sources, so false alarms from these sources are not
likely.

To avoid problems, we urge you to read this manual completely before
you install or use the alarm.

The many special features listed below make the alarm easy to use in
many different applications.

        Alignment Indicator - Helps you install and test your alarm.

          Three Alarm Modes - Lets you set the alarm so that when
                              someone blocks the beam, the alarm can
                              sound for 5 minutes, sound only while
                              something blocks the beam, or sound an
                              annunciator tone.

             Relay Contacts - Activate external devices, such as a
                              security dialer or an alarm system.

        Sensitivity Control - Lets you adjust the alarm for best
                              operation.

    Optional Battery Backup - Gives additional security by letting
                              your alarm operate even when the AC
                              power has turned off.

12-Volt DC Output Terminals - Let you connect an optional external
                              sounding device.

(LB/all-07/12/94)