Purpose of Talkback Systems
Objective
The purpose of installing a talkback system is to enable communication between occupants in trouble zones and rescue support staff.
System Components
The talkback system consists of hands-free units equipped with a speaker, microphone, and a single call button.
Master Control and Receiver Unit
The master control and receiver unit typically includes a handset or microphone and a panel speaker for two-way conversations. It features a display to indicate the caller’s location and control buttons/icons for targeted calls and conference calls.
Operation
When needed, users can activate the talkback unit by pressing the call button. This action will prompt the control panel to display the device ID and location along with a ringtone. The user can then acknowledge the call, establishing a connection for conversation.
Audio Specifications
The talkback unit’s speaker output shall be a minimum of 65 dB, ensuring it is audible to listeners. The microphone should be capable of picking up voice from a distance of up to 1 foot with intelligibility.
Fault Monitoring and Supervision
Each talkback unit is electrically supervised for fault monitoring. The recommended cable for the talkback system shall be fire-resistant, with each core of the cable electrically supervised for open and short circuits.
Connectivity Monitoring
The control panel shall also monitor each talkback speaker unit for connectivity. When a unit experiences defects or connectivity issues, it shall be detected and provide an audio-visual warning.
Power Backup
The talkback system shall include a secondary battery for power backup to ensure an uninterrupted power supply.
What are the locations Talkback speaker unit shall be installed ?
- Each floor level
- Each notification zone
- Each elevator cab
- Elevator lobbies
- Elevator machine room (s)
- Emergency and standby power room (s)
- Fire pump room (s)
- Area(s) of refuge
- Each floor level inside an enclosed exit stair (s)
- Other room (s) or area (s) as required by the authority having jurisdiction.
FAQ for Addressable Talkback system
Addressable Talkback Speaker
Model No:AD2S103
Microphone Feature :
The built-in microphone in the Talkback system is highly sensitive, capable of capturing the voices of distressed occupants even when they are standing and speaking from a distance of up to 5 feet from the unit.
Power and Communication Feature :
The Talkback system boasts an exclusive feature known as Airlight, which utilizes addressable, loop-powered, 2-wire technology for data transmission, power supply, and signaling.
PA Speaker Feature :
Furthermore, the Talkback speaker unit can independently function as an Addressable Public Address (PA) speaker for smaller areas. This eliminates the need for a separate PA speaker in many locations, as the Talkback speaker itself can effectively serve this dual purpose.
Model No:AL-TBCP-101L
- Interactive TFT display with touch screen control.
- Two-wire system for power, data , forward and reverse audio signaling.
- Power supply management system.
- Password security.
- Event logging system.
- Short circuit Protection .
Notably, this control panels innovative design allows it to connect and control the Talkback Unit using just two wires for Power, data, Forward and Reverse Audio signaling. This ground-breaking feature significantly reduces cable requirements.
Regarding power supply, the control panel operates on 24 volts DC. It also includes a built-in 230 volts to 24 volts SMPS (Switched-Mode Power Supply) and a battery charger provision for batteries. Users have the flexibility to choose between the built-in power supply or connect it to an external 24-volt supply, as required.
To ensure system reliability, sustainability, and compliance, the Addressable Talkback system utilizes addressable technology, providing precise location identification and enabling interactive features between components.
Each loop can output up to 1.2 amps.
Devices come with factory-set software addresses based on the order specifications. If there is a need for address modifications, this can be done using the control panel.
Primary control panel is equipped with a single loop.
Incorporating Loop Cards:
When the system necessitates more number of loop, we have the option to introduce loop expansion boards. Each loop expansion board can accommodate up to 3 loops. These loop cards are plug-and-play modules, and depending on the specific site requirements, multiple loop cards can be added to extend the panel’s capacity, allowing for a maximum of 4 loops.
The control panel logs all call and fault history events, aiding in performance assessment during normal days and emergencies.
Wiring and Short Circuit Isolator:
The system requires 2-core cable, simplifying connections between Talkback speakers and the control panel with the option for tee joints and tree wiring. A short circuit isolator monitors and detects overcurrent issues, isolating faulty circuits and notifying maintenance personnel for appropriate action.
| S.NO | Item Description | Unit | Quantity |
| 1 | Control panel for addressable Talkback system with bulit in 2nos 12v 7Ah battery and charger | no | 1 |
| 2 | Addressable talkback speaker | no | 16 |
| 3 | Addressable short circuit isolator | no | 2 |
| 4 | 2×1.5 sq mm copper armoured cable | mtr | 90 |
