Technical / Programming Manual
FT128 Rev 2.2
64
6.1.6.3 Intrinsically Safe Photoelectric Smoke Detectors
SLR-E-IS Intrinsically Safe photoelectric smoke detector (2810).
A conventional intrinsically safe photoelectric (optical) smoke detector, to be
plugged in the intrinsically safe mounting base (2812). The detector has two built-
in LEDs that are lit to indicate that the detector has generated fire alarm. Zone
classification: Cat. 1, 2 or 3. BASEEFA / ATEX classification: EEx ia IIC T5, Tamb=
50°C. Max 20 per zone.
2840 Analogue IS smoke detector. An analogue / addressable photo- electric smoke
detector. The detector can be used with higher IP rating back- box. Three cable
glands are supplied with the back-box. The detector has one built-in LED to indicate
that the detector has generated a fire alarm. The detector is programmed in
EBLWin as an analogue photoelectric smoke detector 4401 (in NORMAL mode)
but it has to be connected to the COM loop via an IS barrier unit 2842. ATEX class:
Ex ia IIC T5.
6.1.6.4 Intrinsically Safe Heat Detectors
DCD-1E-IS Intrinsically Safe heat detector. A conventional intrinsically safe Rate of Rise
heat detector, fixed temperature 60°C (class A1), to be plugged in the intrinsically
safe mounting base. Two built-in LEDs that are lit to indicate that the detector has
generated fire alarm. Zone classification: Cat. 1, 2 or 3. BASEEFA / ATEX
classification: II 1 G EEx ia IIC T5, Ta= -20 to +55°C. Max 20 per zone.
2841 Analogue IS heat detector. An analogue / addressable heat detector. The detector
can be used with a back-box for higher IP rating. Three cable glands are supplied
with the back-box. The detector has one built-in LED to indicate that the detector
has generated fire alarm. The detector is programmed in EBLWin as an analogue
heat detector 3308 (in NORMAL mode) but it has to be connected to a COM loop
via an IS barrier unit 2842. ATEX class: Ex ia IIC T5.
6.1.7 Intrinsically Safe Manual Call Points
MCP 1A-R470SGIS Intrinsically Safe manual call point (2814). A conventional outdoor
manual call point (NO contact and alarm resistor 470Ω). The call point is connected
to Galvanic isolator 2820. The call point is surface mounted with the supplied back-
box (IP67) and has two compression glands for the cable entries. BASEEFA /
ATEX classification: II 1 G EEx ia IIC T4, Ta = -30 to +70°C. Max 20 per zone.
6.1.8 Other COM Loop Units
3366AU External power supply. Conforms to AS7240.4. The unit is connected to a COM
loop, i.e. it is monitored from FT128 e.g. loss of the main power source will
generate a fault in FT128. It can be used as a power supply for external
equipment requiring 24 V
DC
with battery backup, e.g. the 3364 unit. It also has
a "/Mains OK" output (normally low), intended to be connected to the
corresponding input on the 3364 unit.
An oyster metal housing 320W x 330H x 125D mm is used for 3366AU. There
is space for two sealed Lead-Acid backup batteries, 2 x 12V, 7Ah or 12Ah as
the standby power source. Batteries with higher capacity (up to 60 Ah) have to
be placed outside the housing. There are cable inlets on the top, and back sides
of the housing.
The unit has one 24 V
DC
power supply output for external equipment with
up to 2.1 A or 0.85 A continuous current consumption, at the same time as the
The rated output voltage for the main power supply is 24 V ± 1%. Max. ripple 500 mVp-p. The rated output voltage for the
standby power source (the backup battery) is 18 – 28 V
DC
. NOTE! The voltage will, however, be decreased to approx. 15 V
while the output will be switched off in order to avoid damaging the batteries.
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