A Signalling Line Circuit (SLC) in fire and life safety systems is a communication pathway used to connect various devices, such as smoke detectors, heat detectors, manual pull stations, and other sensors, to a Fire Alarm Control Panel (FACP). The SLC allows these devices to transmit and receive data, enabling real-time monitoring and control within the fire alarm system.
Key characteristics of an SLC:
- Two-way communication: It allows devices to both send signals to the FACP (such as alarms or fault conditions) and receive instructions (such as activation or reset commands).
- Addressable devices: In modern systems, devices on an SLC are often addressable, meaning each device has a unique identifier. This enables the system to precisely locate and identify the status of each device, improving detection and response efficiency.
- Fault isolation: The SLC can incorporate isolation modules, which help isolate sections of the circuit if a fault occurs, ensuring that the rest of the system continues to function.
- Efficiency: SLCs are typically more efficient than traditional circuits, as they reduce the amount of wiring needed by using a single loop to communicate with multiple devices.
In summary, the SLC is a critical component in fire alarm systems that enhances the detection and response capabilities of fire and life safety systems, allowing for more sophisticated and reliable protection.
Features
- 1 to 10 isolated intelligent Signalling Line Circuits (SLC).
- Up to 99 detectors and modules per SLC.
- Detectors can be any mix of photo, thermal, or multisensory.
- Modules include addressable pull stations, normally open contact devices, two wire smoke detectors, and notification.
- Large 2-line, 80-character LCD backlit display.
- Advanced microprocessor-based addressable fire alarm control panel.
- 8 addressable zones.
- Each zone supports 99 addressable devices (any combination).
- Zone-wise fire and fault LED indication.