The communicator can supervise and report status of the backup battery and AC power source when powered from the AC adapter. It has an integrated control and power component which keeps the communicator’s battery charged and is also supervised. Furthermore, the communicator can report on low voltage events when powered from a DC source at the alarm panel.
Low/Missing Battery Condition (LBC)
When using AC as the main power source, the communicator checks the backup battery voltage on initial power-up and every 60 seconds thereafter. If the battery voltage is less than 11.6 volts, it charges from good to bad and an LBC occurs whereby the STC LED blinks twice, and the 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)
f 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.