TG-7 Dual Path Series Installation & Operating Guide
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56052601 Rev B © 2022 Telguard
STC relay trips. When the battery voltage increases to 12.1 volts, the STC LED and STC relay restore.
The communicator also indicates Low/missing Battery Condition (LBC) when the battery charger
fails, or the battery fails the periodic load test.
AC Failure Condition (ACFC)
AC failure condition (ACFC) is detected immediately when the AC power-driven input from the
plug-in adapter drops below 8 VAC. When this condition is detected, the STC LED blinks once, the
Power LED turns off, and the STC trip output is activated after a preset time (default 2 hours).
When AC power returns to normal (at least 10 VAC), the Power LED turns on immediately and the
STC trip output restores after 60 seconds. When ACFC occurs, you may want to verify both the
power at the outlet and that coming from the adapter.
Low Power Failure (LPF)
If the communicator is being powered through the DC connection, a Low Power Failure condition
(LPF) is detected immediately when the DC power drops below 7.5VDC. When this condition is
detected, the STC LED blinks once, the Power LED turns off, and the STC trip output is activated
after a preset time (2 hours). When DC power returns to normal (
8VDC), the Power LED turns on
immediately and the STC trip output restores after 60 seconds.
Dial Tone Failure (DTF)
The communicator provides a telephone interface similar to that of a Telco central office. The
communicator continuously monitors the circuit that provides dial tone to the alarm panel. The
communicator supplies 30VDC by default but can be configured to supply 40VDC, as needed. A
Dial Tone Failure (DTF) occurs when the communicator is unable to provide proper telephone
signaling to the panel (voltage supplied unexpectedly drops). The STC LED will flash 6 times and
the STC relay will trip.
NOTE: This condition will require contacting Telguard Technical Support for resolution.
Catastrophic Failure (CF)
Catastrophic Failure (CF) is any condition that causes the communicator to stop functioning at all
levels. The most common CF is a power failure event with insufficient battery backup. The STC1
and STC2 trip outputs are activated, and the visible indication is loss of all LED activity.
Telguard Automatic Self-test Report
The automatic self-test signal schedule is programmable as prescribed when the communicator is
registered. The Central Station receives the automatic self-test report in the same format that the
alarm panel normally uses for communication over the Telco line. The self-test code and testing
frequency are set during registration and can accommodate any code the Central Station expects.
Self-tests include separate reporting for both the cellular and LAN pathways (unless in cellular only
mode).
The TCC captures all current and historical data pertaining to the operation of the communicator
when it processes the automatic self-test signal. This data contains current operational status
(C.O.S.) of the communicator such as "All OK", "AC fail condition", "low/missing battery condition",
LAN failure condition, or any combination of identified trouble conditions as well as the current
cellular signal strength. In addition, the data also contains historical data for supervisory events that
occurred since the last self-test or Check Status report signal was transmitted. This data includes
the number of occurrences of AC fail conditions, low battery conditions, LAN failure conditions, and
no cellular service conditions. This additional information is available by visiting
(dealer log-in credentials required).
