One who announces. Specifically: An officer in the church of Constantinople, whose business it was to inform the people of the festivals to be celebrated.
An indicator (as in a hotel) which designates the room where attendance is wanted.
This is a signaling device, either visual or audio based. For example, wireless annunciators use infrared beams that trigger an audible signal when interrupted, and can be used for security or retail purposes.
A device which gives a visible or audible indication of the condition or status, such as normal, trouble, or alarm, of a smoke detector or system.
A unit containing one or more indicator lamps, alphanumeric displays, or other equivalent means in which indication provides status information about a circuit, condition, or location.
an indicator that announces which electrical circuit has been active (as on a telephone switchboard)
a visualindicating device that will be discussed later in this chapter
(1) A device that signals a change of protection zone status in a security system. An annunciator may log alarms or display a continuous status for each alarm sensor in a system. Annunciators include Cathode Ray Tube displays; sometimes called an alarm receiver, alarm monitor or alarm device. (2) The component of an alarm system that announces a change of status of the systems, usually in the form of audible and/or visual signals.
Audible and visual signaling device.
An annunciator is an accessory device used to give remote indication of the status of an operating component in a system. Annunciators are typically used in applications where the equipment monitored is not located in a portion of the facility that is normally attended. The NFPA has specific requirements for remote annunciators used in some applications, such as hospitals.
An alarm-monitoring device, which consists of visible signals (lamps/LEDs) that indicate the status of system alarm points. In most integrated systems, status, alarms and other types of events are shown on a display terminal or readout device. A buzzer, bell or other audible device may accompany the annunciation. Each circuit in the device is usually labeled to quickly identify the location and condition being monitored.
A unit that announces an alarm with audible and/or visual indications.
A device or group of devices that call attention to changes in process conditions that have occurred. Usually included are sequence logic circuits, labeled visual displays, audible devices, and manually operated acknowldege and reset push buttons.
Something that announces. Indicator which is used to show when a condition occurs.