Description

Apollo Discovery 55°C Heat Detector

Part Number: 58000-400APO

Discovery heat detectors have a common profile with ionisation and optical smoke detectors but feature a low air flow resistance case made of self-extinguishing white polycarbonate.

For the European standard version of the detector, the five modes correspond to five “classes” as defined in EN 54-5. The classes correspond with different response behaviour, each designed to be suitable for a range of application temperatures. All modes incorporate “fixed temperature” response, defined in the standard by the “static response temperature”.

Electrical Description

The Discovery Heat Detector uses a single thermistor to sense the air temperature at the detector position.

The thermistor is connected in a resistor network, producing a voltage output dependent on temperature. The design of the resistor network, together with the processing algorithm in the microcontroller, provides an approximately linear characteristic from 10°C to 80°C.

This linearised signal is further processed, depending on the response mode selected, and converted to an analogue output.

Operation

Discovery detectors are designed to be operated with purpose-designed control and indicating equipment that makes full use of their features.

Discovery can, however, be connected to any fire control panel capable of operating existing ranges of Apollo analogue addressable detectors, provided that the control and indicating equipment does not have a drift algorithm operating on Discovery devices.

Contact the fire control panel manufacturer for guidance.

Communication

Discovery uses a digital communications protocol developed from the XP95 protocol. It allows communication in three different modes:

• Normal Mode
• Read Mode
• Write Mode

This enables a more extensive exchange of information and commands than previous analogue addressable ranges. Discovery can also store data in non-volatile memory.

• Normal Mode is identical to the XP95 protocol, except that the five additional analogue value bits in the XP95 protocol extension have been re-defined so the fire control panel can distinguish between Discovery and XP95 devices.

• Read Mode checks information stored in the non-volatile memory of each detector and is accessed by extending the Normal mode communication method.

• Write Mode allows the fire control panel to write information to the detector in the same way as Read mode. During Read or Write modes, a detector can signal an alarm using the alarm flag and alarm address bits.

Discovery detectors are compatible with XP95 and Soteria.

Discovery features will not be available when Discovery is used with XP95 fire control panels. Fire control panels with drift compensation algorithms should disable the algorithms when communicating with Discovery.

For fire control panels running CoreProtocol, refer to the fire control panel manufacturer’s operating instructions.

Product Specification

Specifications are given at 23°C and 50% relative humidity unless stated otherwise.

Product Code:	58000-400
Detection Principle:	Heat Sensitive resistance
Supply wiring:	Two-wire supply, polarity insensitive
Terminal Functions:	L1 & L2: Supply in and out connections – +R: Remote indicator positive connection (Internal 2.2kΩ resistance to positive) – -R: Remote indicator negative connection (internal 2.2kΩ resistance to negative)
Operating Voltage:	17-28V DC
Communication protocol:	Apollo Discovery 5-9V peak to peak
Quiescent Current:	400µA
Power-up surge current:	1mA
Maximum power-up time:	10 seconds
Alarm Current, LED illuminated:	3.5mA
Remote output characteristics:	Connects to positive line through 4.5kΩ (5mA maximum)
Alarm level analogue value:	55
Alarm indicator:	2 Red Light Emitting Diodes (LEDs);  illuminated red in alarm, Optional remote LED
Temperature Range:	-40°C to +80°C
Humidity:	0 to 95% relative ( No condensation or icing)
Vibration, Impact & Shock:	To EN54-7:2000
IP Rating:	54 in accordance with BSEN60529
Dimensions (D x H):	100 x 42mm
Weight:	Detector: 105g Detector In Base: 160g
Materials:	Housing: White polycarbonate V-0 rated to UL94 – Terminals: Nickel plated stainless steel