General Introduction
The XPlorer heat detectors have a low air flow resistance case made
of self-extinguishing white polycarbonate. The device monitor temperature
by using a single thermistor network, which provides a voltage output
proportional to the external air temperature.
The response to heat increases of the standard
heat detectors, Part nos 59000-405 and 59000-406, enables the detector
to be utillised as an EN54-5:2000 A2S heat detector, which is equivalent
to an EN54-5:1984 Grade 2 detector.
A high temperature heat detector, Part no 59000-415
(with standard base) or 59000-416 (with LED driver base), which
has similar characteristics at 25 C but reaches a 55 count at 90
C, is available for use in normal ambient temperatures of up to
55 C. This detector meets the requirements for a CS detector in
EN54-5:2000.
Part no 59000-405 (with standard base)
Part no 55000-406 (with LED driver base)
General Introduction
The XPlorer isolator senses and isolates short circuit faults on
XPlorer loops. It is loop powered and polarity sensitive. Power
and signals to the affected section are restored automatically when
the fault is cleared.
General Introduction
The XPlorer manual call point is designed for surface mounting and
incorporates the call point assembly and a black box.
The address of each call point is set at the commissioning
stage by means of a six-segment DIL switch, giving a range of addresses
from 64 to 126.
A single alarm LED provided on the call point.
This LED is controlled, independently of the call point, by the
CIE. Call points can be remotely tested from the control and indicating
equipment by transmission of a single bit in the communications
protocol. Call points responds by providing a value of 64, which
corresponds to the alarm value. The CIE will recognise this response
as a test signal and will not raise a general alarm.
General Introduction
The XPlorer optical detector has a moulded self-extinguishing white
polycarbonate case designed to allow free entry of smoke while minimising
the effects of dust contamination. Stainless steel wiper contacts
connect the monitor to the terminals in the mounting base. Within
the case is a printed circuit board, which on one side has the lightproof
labyrinth chamber with integral gauze surrounding the optical measuring
system. The other side has the address capture, signal processing
and communications electronics.
An infrared light emitting diode (IR LED) within
the optical chamber is arranged at an obtuse angle to a photo-diode.
The photo-diode has an integral daylight-blocking filter. The IR
LED emits a burst of collimated light every second. In clear air
the photo-diode receives no light directly from the IR-LED. When
smoke enters the chamber it scatters light from the IR LED onto
the photo-diode in an amount related to the smoke characteristics
and density. The photo-diode signal is processed by the optical
ASIC and passed to the A/D converter on the communications ASIC
ready for transmission when the device is interrogated.
Part no. 59000-605 (with standard base)
Part no. 59000-606 (with LED driver base)
General Introduction
The XPlorer Output Unit provides a voltage-free, single pole, change-over
relay output. The change-over contact is operated by an output bit.
The Output Unit returns an analogue value of 16 under all conditions.
