Abstract: A method of granting control access comprises displaying a QR code on a fire panel annunciator. A user device captures the QR code, extracts information from it, and forwards the extracted information to the fire panel. If the fire panel verifies that the extracted information is valid, the panel grants temporary control access to the user device.

Abstract: A method of granting control access comprises displaying a QR code on a fire panel annunciator. A user device captures the QR code, extracts information from it, and forwards the extracted information to the fire panel. If the fire panel verifies that the extracted information is valid, the panel grants temporary control access to the user device.

Abstract: A method for performing voltage drop calculations in an alarm circuit comprises creating a circuit to be controlled. A first device is selected from a list of devices to add to the circuit. An estimated power supply of the first device is calculated using modified nodal analysis of the circuit and it is determined whether the estimated power supply of the first device is sufficient power for the first device to operate.

Abstract: A method for performing voltage drop calculations in an alarm circuit comprises creating a circuit to be controlled. A first device is selected from a list of devices to add to the circuit. An estimated power supply of the first device is calculated using modified nodal analysis of the circuit and it is determined whether the estimated power supply of the first device is sufficient power for the first device to operate.

Abstract: A hazard alarm includes: a detector for detecting a hazard parameter, trigger logic; and reset logic. The trigger logic triggers an alarm state when the measured parameter reaches a predetermined trigger threshold. The alarm state is maintained until a reset is successfully performed. The reset logic, upon a reset command, resets the alarm state if the measured parameter is below a predetermined reset threshold, and inhibits resetting of the alarm state if the measured parameter is above the predetermined reset threshold.

Abstract: A method for verifying operation of notification appliances on a notification appliance network during low input voltage conditions is provided. An output voltage is supplied to a network and is measured at a control panel. An input parameter is measured at a notification appliance connected to the network. A supply line impedance is calculated for the notification appliance based on at least one of the output voltage and the input parameter. At least one of the supply line impedance, the output voltage and the input parameter are used to determine a pass/fail condition for the notification appliance during a low voltage condition.

Abstract: Mis-wired addressable loops are determined by enabling all loops and identifying all devices communicating on all loops. A list of all identified devices is recorded. One at a time, each loop is disconnected, a list of devices that are disabled is determined and recorded for the disconnected loop, and the loop is reconnected. When all of the loops have been processed, the lists of disabled devices are compared and those devices that are wired improperly are determined.

Abstract: An emergency lighting unit includes a lamp, a backup battery, and controller and a network interface. The controller connects the backup battery to the lamp upon detection of an emergency condition and loss of main power. The network interface interfaces with and receives commands via a fire alarm network. Each emergency lighting unit has a unique identifier with respect to the fire alarm network.

Abstract: A hazard alarm includes: a detector for detecting a hazard parameter; trigger logic; and reset logic. The trigger logic triggers an alarm state when the measured parameter reaches a predetermined trigger threshold. The alarm state is maintained until a reset is successfully performed. The reset logic, upon a reset command, resets the alarm state if the measured parameter is below a predetermined reset threshold, and inhibits resetting of the alarm state if the measured parameter is above the predetermined reset threshold.

Abstract: An apparatus, system and method for quickly and simply providing non-duplicative addresses for addressable devices on a communication channel or network. The system contains at least one system controller communicating with at least one addressable device on at least one communications channel or network. Preset address elements configured in a mating connector arrangment or as an adhesive label provide unique addresses to each of the addressable devices. The preset address elements may use digital or analog circuit techniques to encode unique addresses that are subsequently read and stored by the addressable devices. When installed, the preset address elements also provide visual indications of the device addresses.