Installation Manual

Kingfisher Company, inc. STAR-ELT Manual
KCi #99420-MAN Rev 0.6 Page 16 of 29
Figure 8 Antenna Connection and Supervision LED
13. Optional AC Power Supply
The STAR-ELT can be powered from an optional AC power supply. This module also
supervises and charges the optional backup battery, which must be used with this module is
applied. AC line power is supplied to the power supply and must be in the range 120VAC
nominal. The power supply generates the desired operational DC voltage of the STAR-ELT and
what is required to properly charge the battery, typically 13.8 – 14.2 VDC.
The power supply monitors AC voltage and switches from the AC-to-DC power supply to the
battery when it detects either a brownout condition or total loss of AC voltage. Upon detecting
either of these conditions, the yellow Power Fault LED flashes every second.
When operating from battery power, the power module continues to monitor both the AC
voltage, to look for return of AC power, and the DC voltage, to ensure that the battery does not
become so depleted that it is damaged. There are two operational battery levels that are acted
upon by the STAR_ELT. When the battery reaches the Low Battery threshold, all messages sent
by the STAR-ELT are encoded to also report a Low Battery condition. Later, when the battery is
further depleted, and its voltage reaches the Battery Cutoff threshold, the STAR-ELT shuts itself
down to prevent excessive depletion of the battery. Note that even after the battery is not being
drained by the STAR-ELT, its internal resistance causes it to continue to lose charge slowly. It
is important to recharge the battery soon after shutdown to prevent damage to its cells. In this
condition the trouble contacts are closed and can be used to indicate to the associated panel that
the STAR-ELT is no longer operational. This feature also ensures that transmissions will only
be sent within the proper operating range of the product, thus ensuring correct signals will be
transmitted.
Antenna
Supervision
LED1
Antenna
Connection