2.9.
Dimensions
(base
incl.):
-
diameter
-
∅
106
mm
-
height
-
48
mm
2.10.
Weight
(base
incl.)
-
0,150
kg
3.
STRUCTURE
AND
FUNCTION
The
short
circuit
isolator
layout
is
seen
on
fig.1
6202L
consists
of
two
main
parts:
a
base
and
an
isolator
head.
The
latter
comprises
a
circuit
board.
The
contact
plates
are
fixed
to
the
base.
The
isolator
head
is
fixed
on
the
base
by
the
means
of
bayonet
joints.
When
locating
the
isolator
head
on
the
base,
make
sure
the
bench
mark
stands
about
20
mm
before
the
respective
bench
mark
on
the
base;
then
rotate
clockwise
to
fix.
The
bench
marks
should
fully
coincide
when
fixed.
Option:
A
flat
point
screw
is
provided
on
the
adapter
head
to
prevent
unauthorized
removal.
A
2
mm
tip
screwdriver
is
required
for
locking
and
unlocking.
TE
ST
Isolator
head
Base
Leading
bench
marks
LED
LED
Flat
point
screw
Fig.1
The
short
circuit
isolator,
connected
between
two
adjacent
segments,
monitors
the
resistance
of
the
segments.
When
resistance
value
reaches
a
fixed
low
threshold,
the
isolator
switches
over
to
alarm
state.
The
surface
yellow
LEDs
illuminate
and
the
line
(loop)
power
supply
(negative
wire)
is
interrupted
in
isolatorís
point
of
connection.
When
the
resistance
of
the
isolated
wire
segment
is
restored
to
the
normal
limits,
the
isolator
automatically
switches
over
to
its
quiescent
state.
The
LEDs
extinguish
and
the
power
supply
is
resumed.
Isolator
diagram
is
fully
symmetrical
in
relation
to
the
input
and
output
wire
segment.
In
Line
configuration
(fig.
2.1.)
due
to
one
side
power
supply
the
isolator
is
capable
to
isolate
short
circuit
detected
in
the
segment
after
the
isolator
in
relation
to
the
fire
control
panel.
In
Loop
configuration
(fig.2.2.)
due
to
both
sides
power
supply
the
isolator
is
active
in
both
directions
ñ
i.e.
the
short
circuited
wire
segment
is
isolated
by
two
adjoining
isolators.
When
in
Line
configuration
connect
isolators
at
the
beginning
of
a
line;
in
Loop
configuration
connect
isolators
at
both
loop
ends;
use
one
isolator
for
maximum
32
fire
detectors.
4.
PREPARING
THE
ISOLATOR
FOR
OPERATION
4.1.
Connection
diagram
Connection
diagram
of
isolator
base
to
shielded
fire
alarm
line
is
shown
on
fig.2.1
ñ
line
configuration,
and
on
fig.2.2
ñ
loop
configuration.
2
5
1
4
2
1
5
4
4
5
1
2
Shield
FS6000
Fire
Control
Panel
Fire
detector
Address
1
Isolator
Fire
detector
Address
127
Fig.2.1.
1
5
2
4
2
1
5
4
1
5
4
2
5
4
1
2
5
1
4
2
Shield
Fire
detector
Address
001
Isolator
Shield
FS6000
Fire
Control
Panel
Fire
detector
Address
xxx
Fire
detector
Address
127
Isolator
FS6000
Fire
Control
Panel
Fig.2.2.
4.2.
à ounting
Separate
the
base
from
the
head
by
turning
the
isolator
head
in
an
anti-clockwise
direction.
Feed
the
connection
cable
through
the
cable
entry
in
the
centre
of
the
base.
Fix
the
base
on
the
ceiling
using
appropriate
fixings.
Complete
the
wiring
as
shown
on
fig.
2.1
or
2.2.
Replace
the
isolator
head
on
the
base
by
offering
the
isolator
head
to
the
base
ensuring
bench
marks
are
no
more
than
20
mm
apart.
Rotate
the
isolator
head
in
a
clockwise
direction
to
complete
location.
Lock
the
isolator
head
to
the
base
by
screwing
the
flat
point
screw,
using
a
2
mm
tip
screwdriver,
ensure
not
to
over
tighten.
4.3.
Testing
According
to
fig.2.1
the
isolator
is
supplied
with
output
voltage
18
VDC
ñ
26
VDC
and
output
resistance
not
lower
than
20
Ω
.
Terminals
4
and
1
are
to
be
terminated
by
resistor
<
20
Ω
.
Upon
activation
the
yellow
LED
is
illuminated
and
remains
active
until
short
circuit
is
eliminated.
Exchange
the
wires,
connected
to
terminals
1
and
2.
Complete
the
same
test
procedure
to
terminals
4
and
2.
Short
circuit
isolators
are
tested,
in
real
conditions,
by
terminating
the
negative
and
positive
wires
(after
the
isolator)
of
the
line
or
loop
configuration.
