Installation Instructions
56025001 Page © 2003 Telular Corporation
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five times and switches the Telguard to Telco. Restoral of RFC occurs when the
communication cycle is completed.
2.3.4.2 RFC2 (Link Termination Failure)
After the Telguard receives a Link Request ACK from the TCC, the Telguard
communicates with the C/C to acquire the alarm message and transmits the
message via radio. If the Telguard does not receive a link termination ACK
(where the TCC acknowledges receiving the transmission) within 30 seconds, it
will retry sending the entire transmission. Upon failing two attempts, the
Telguard switches to Telco and allows the C/C to communicate directly with the
Central Station. An RFC is declared causing the STC1 relay to trip and the STC
LED to flash five times. Restoral of RFC occurs when the communication cycle
is completed.
2.4 COMPLETE POWER SUPERVISION
Telguard monitors its backup battery as well as its AC power source and reports low or missing power
conditions from either. Telguard’s integrated control and power module incorporates a battery charger
circuit that is programmable for various battery capacities.
2.4.1 Low/Missing Battery Condition (LBC)
The Telguard checks the backup battery voltage on initial power-up and every 5 minute
thereafter. Additionally, a battery voltage test is performed by the Telguard every 24-
hours while operating on AC power in order to measure the loaded battery voltage.
Battery charging voltage turned off and the places a load on the battery. If the battery
voltage is less than 11.6 volts, a LBC is declared whereby the STC LED blinks twice (½
sec ON, ½ sec OFF, ½ sec ON, ½ OFF every 5 seconds) and the STC2 relay trips. When
the battery voltage increases to 12.1 volts, the STC LED and STC2 relay restore.
2.4.2 AC Failure Condition (ACFC)
AC failure condition (ACFC) occurs when AC power is lost or less than 102 VAC for 6
continuous hours (programmable). The AC Power LED goes out immediately, the STC
LED blinks once and the STC trip output is activated after 6 hours. When AC power
returns too normal (≥106 VAC for 60 seconds), the AC Power LED turns on immediately
and the STC trip output restores after 60 seconds.
2.4.3 Catastrophic Failure (CF)
Catastrophic Failure (CF) is any condition that causes the Telguard to stop functioning at
all levels. Most commonly because of AC power failure followed by a complete
discharge of the backup battery. The STC1 and STC2 trip outputs are activated and
visible indication is loss of all LED activity. Total loss of power to Telguard does not
prevent transmission of alarm messages from the host C/C “through” the Telguard and
out over an operative phone line in the normal fashion. This is a single line system.
Alarm operation over Telco is not guaranteed.
2.5 TELGUARD AUTOMATIC SELF-TEST REPORT
The Telguard automatic self-test signal is originated by the Telguard on a daily, weekly, or monthly
schedule. When the time for an automatic self-test occurs, the Telguard transmits a radio signal to the
Communication Center and the Communication Center processes the signal on to the central station, just as
normal alarm signals are processed. The central station receives the automatic self-test report in the same
format that the C/C normally uses for communication over the telco line. The central station provides the
Telguard self-test code along with the time and frequency of transmission when the Telguard is initially
activated. However, an automatic self-test report can be initiated later, after the Telguard is installed, as
well as modifying the time or frequency of reporting.
The Communication Center captures all current and historical data pertaining to the operation of the
Telguard when it processes the automatic self-test signal on to the central station. This data contains
current operational status (C.O.S.) of the Telguard such as "All OK", "AC fail condition", "low/missing
battery condition", "line fault condition", or any combination of these as well as the current signal strength.