User`s manual

As the battery voltage begins to get low, the
device itself will begin to beep about every
fourteen seconds. If this does not result in the
batteries being replaced within a reasonable time,
the smoke detector’s transmitter will send a low
battery signal to the CCU. This second warning
occurs with at least seven days of normal opera-
tion left, allowing Dealer or User to replace the
battery without loss of protection. Notice that a
specific battery type is required for smoke detec-
tors because of its size (see “Maintaining Battery
Powered Devices” in the “Maintenance and
Periodic Testing” portion of the user’s manual).
Wireless Passive InfraRed
Detector (Model 8561)
Like other wireless devices, th e PIR (see Figur e 1 -
6) is battery powered and communicates by radio
transmission.
Figure 1-6 Wireless PIR
The PIR is a motion detector which detects
intruders by observing the infrared energy they
emit as they cross the optical detection zones.
When the PIR senses an intruder, it sends an
alarm message to the CCU, which responds
according to its programming; to conserve the
batteries, it will not send another alarm fo r
2-1/2
minutes. Th e PIR features an LED for walk testing
the unit and a built-in tamper switch which acti-
vates when the housing is opened. When the
battery gets low, the PIR transmits a low battery
message to the CCU; at this time, there will be
power for at least seven days of proper operation.
Universal Transmitter (Model 8240)
Like the other wireless devices, this one (see
Figure 1-7) is battery powered and communicates
by radio transmission to the CCU. It does not
have its own sensor, but can be connected to
other sensors or used as a personal distress
transmitter (with the pushbutton on the case) and
carried throughout the premises.
Figure 1-7 Universal Wireless Transmitter
Like the others, it transmits a low-battery signal to
the CCU and also has a tamper switch.
l-6 AT&T Security System 8300 Installer’s Manual