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MAN3038-2
DISCOVERY PRODUCT GUIDE
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Introduction
Discovery® is a range of high-specification, analogue addressable fire detectors and alarm devices.
Discovery detectors offer effective false alarm management by a combination of EN54 approved operating
modes and sophisticated algorithms.
Drift compensation further reduces the likelihood of false alarms caused by a build-up of dust in the sensing
chamber. In addition to the familiar smoke and heat detectors, the Discovery range features two multisensor
detectors. One is an optical/heat multisensor which can be used to protect against many types of fire risk.
The other is a carbon monoxide/heat multisensor which protects against both smouldering fires and those
generating heat.
Key Features include:
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Five approved response modes for ease of optimisation to different environments
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Rejection of transient signals
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Drift compensation to ensure constant sensitivity
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360° visibility in alarm
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Flashing LED option
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Alarm flag for fast alarm reporting
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Four bytes of non-volatile memory for user data
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Compatibility with XP95 systems
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Communications
Discovery uses a digital communications protocol which has been developed from the XP95 protocol but
which differs in that it allows communication in three different modes: Normal, Read and Write to allow a
more extensive exchange of information and commands than previous analogue addressable ranges. In
addition, Discovery can store data in non-volatile memory.
The Normal mode is identical to the XP95 protocol with the exception that the five additional analogue value
bits in the XP95 protocol extension have been re-defined so that the control panel is able to distinguish
between Discovery and XP95 devices.
The Read mode is used to check information stored in the non-volatile memory of each detector. It is
accessed by using a simple extension to the Normal mode communication method from the control panel to
the detector.
In Write mode the panel is able to write information to the detector by extending the communication method
in the same way as in Read mode.
During Read or Write modes a detector can signal an alarm by means of the alarm flag and alarm address
bits.
Discovery detectors are compatible with XP95. It should be noted, however, that Discovery features will not
be available when Discovery is used with XP95 control panels. Panels with drift compensation algorithms
should disable the algorithms when communicating with Discovery.
