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Series 65
 
Series 65 incorporates well-proven sensing technologies, together with
advances in materials and electronics technology, including an IC based on that
used in XP95 analogue addressable detectors. Having a wide operating voltage of
9-33V, the Series 65 detectors can be integrated into security systems, when
used with a relay base. The Series 65 wide voltage range consists of ionisation,
integrating ionisation and optical smoke detectors, 4 grades of heat detector
and a range of bases. The detectors are identical in appearance to Series 60.
Each type of detector is available in three versions:
1. a standard version
2. a version with an LED which flashes continuously in quiescent mode
3. and one with both a flashing LED and a magnet-operated test switch (reed
relay)
 | wide operating voltage |
| advanced electronic technology |
| flashing LED option |
| magnetic test switch option |
| can be used on security systems |
| electrically compatible with Series 60 |
| mechanically compatible with Series 60 |
| proven detection performance |
| designed to meet approvals worldwide |
| Range of bases available |
Series 65 Ionisation Smoke Detector
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The sensing part of the detector consists of two chambers -
an open, outer chamber and a semi-sealed reference chamber within. Mounted
in the reference chamber is a low activity radioactive foil of Americium 241
which enables current to flow between the inner and outer chambers when the
detector is powered up. |
As smoke enters the detector, it causes a reduction of the current flow in
the outer chamber and hence an increase in voltage measured at the junction
between the two chambers. The voltage increase is monitored by the
electronic circuitry which triggers the detector into the alarm state at a
preset threshold.
An externally visible red LED lights up when the detector changes to alarm
state. An integrating ionisation detector, suitable for use in areas where
transient levels of smoke may be expected, is also available.
Series 65 Optical Smoke Detector
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Optical smoke detectors incorporate a pulsing
LED located in a chamber within the housing of the detector. The chamber is
designed to exclude light from any external source. At an angle to the LED
is a photo-diode which normally does not register the column of light
emitted by the LED. |
In the event of smoke from a fire entering the chamber, the
light pulse from the LED will be scattered and hence registered by the
photo-diode.
If the photo-diode "sees" smoke on the two following pulses, the
detector changes into the alarm state and the indicator LED lights up. The
detector housing is identical to that of the ionisation detector but has an
indicator LED which is clear in quiescent state but produces red light in alarm.
Series 65 Heat Detector
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The A1R, BR and CR (rate-of-rise) heat detectors operate by
using a matched pair of thermistors to sense heat. One thermistor is exposed
to the ambient temperature, the other is sealed. In normal conditions the
two thermistors register similar temperatures, but, on the development of a
fire, the temperature recorded by the exposed thermistor will increase
rapidly, resulting in an imbalance, causing the detector to change into the
alarm state. |
Rate-of-rise detectors are designed to detect a fire as the
temperature increases, but they also have a fixed upper limit at which the
detector will go into alarm if the rate of temperature increase has been too
slow to trigger the detector earlier. The CS (static response) heat detector has
only one thermistor and changes to the alarm state at a preset temperature.
Externally, the heat detectors are distinguishable from the smoke detectors by
having wide openings to the surrounding atmosphere to allow good movement of air
around the external thermistor.
Series 65 Bases
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The bases have been designed to enable detectors to be
plugged in without any need for force - particularly useful when fitting to
suspended ceilings. All Series 65 bases are lockable. The standard base is
identical to the Series 60 base, so uses the same part number, 45681-200. It
contains no electronic parts which could be damaged during installation. |
Relay Bases
Application
Series 65 relay bases are primarily intended for use with control units using
4-wire detector supply and alarm initiating circuits. Where local codes allow,
they may also be used in 2- and 4-wire circuits to provide volt-free control
signals to an auxiliary system such as an automatic door closer. They are not
suitable for use in systems where it is specified or required that operation of
the auxiliary system shall be fail-safe.
Description
Series 65 relay bases are designed for use with Apollo Series 65 fire detectors
and compatible control equipment. They must not be used with any other type of
detector.
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