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16
2.3.5.4.3 Intrinsic Safe Arrangement
7
The Zone Circuit can be configured for use with
Intrinsic Safety detectors and barriers
– see
programming section.
The recommended isolation barrier is a
FUCHS Model: KFDO-CS-Ex1.51P or
MTL Model: 5061
Only use intrinsic safe detectors and call points.
The number of devices permitted and cables will
depend on the IS classification
– refer to the
detector manufacturers’ information for further
details.
6800Ω
Zone-1 Zone-2 Zone-3
IS Detector
IS Detector
IS Call Point
SAFE AREA
HAZARDOUS AREA
11
12
1
2
Isolation
Barrier
+
–
The End-of-line resistor used must be rated for the
appropriate IS zone classification.
2.3.5.5 Sounder / Monitored Output Circuits
Three conventional 24V DC sounder style output
circuits are provided.
8
18.0
– 28.0 V DC, 1.0A
9
max
SUPERVISED. POWER LIMITED.
The sounder outputs can be configured to turn on
continuously or to pulse (1s ON / 1s OFF).
The sounder outputs are monitored for open and
short circuit conditions using reverse polarity
signals.
The outputs can be configured to be non-
silencing for use with pilot valves, etc. (refer to
section 0 for programming).
U
S
B
S
U
P
P
L
Y
P
S
U
C
o
m
m
s
P
R
O
G
R
U
N
u
P
M
O
D
E
R
E
B
O
O
T
R
e
l
a
y
-
1
F
I
R
E
R
e
l
a
y
R
e
l
a
y
-
2
F
A
U
L
T
R
e
l
a
y
R
S
4
8
5
A
U
X
S
u
p
p
l
y
Z
O
N
E
-
1
-
Z
O
N
E
-
2
-
Z
O
N
E
-
3
-
S
N
D
R
-
1
-
S
N
D
R
-
2
-
S
N
D
R
-
3
-
M
O
D
E
S
e
l
e
c
t
M
a
n
u
a
l
T
r
i
g
g
e
r
H
O
L
D
A
B
O
R
T
P
r
e
s
s
u
r
e
M
o
n
i
t
o
r
V
A
L
V
E
M
o
n
i
t
o
r
F
L
O
W
M
o
n
i
t
o
r
A
c
t
u
a
t
o
r
O
u
t
p
u
t
P
R
O
G
I
n
p
u
t
-
1
P
R
O
G
I
n
p
u
t
-
2
P
R
O
G
I
n
p
u
t
-
3
P
R
O
G
I
n
p
u
t
-
4
M
A
N
U
A
L
O
N
L
Y
A
U
T
O
+
M
A
N
U
A
L
L
O
W
P
R
E
S
S
U
R
E
M
A
N
U
A
L
D
I
S
A
B
L
E
D
D
I
S
A
B
L
E
D
F
A
U
L
T
T
I
M
E
R
H
E
L
D
A
B
O
R
T
E
D
R
E
L
E
A
S
E
I
M
M
I
N
E
N
T
R
E
L
E
A
S
E
D
E
X
T
I
N
G
U
I
S
H
A
N
T
P
O
W
E
R
S
Y
S
T
E
M
F
A
U
L
T
T
E
S
T
S
O
U
N
D
E
R
D
E
L
A
Y
E
D
D
I
S
A
B
L
E
S
O
U
N
D
E
R
D
I
S
A
B
L
E
D
F
A
U
L
T
S
O
U
N
D
E
R
F
A
U
L
T
F
I
R
E
S
I
L
E
N
C
E
D
G
E
N
E
R
A
L
-
1
-
D
E
T
E
C
T
I
O
N
Z
O
N
E
S
F
I
R
E
F
A
U
L
T
/
T
E
S
T
/
D
I
S
A
B
L
E
-
2
-
-
3
-
E
S
C
M
E
N
U
W
X
Y
Z
T
U
V
P
Q
R
S
G
H
I
J
K
L
M
N
O
D
E
F
A
B
C
R
E
S
E
T
S
I
L
E
N
C
E
/
R
E
S
O
U
N
D
M
U
T
E
!
S
O
U
N
D
A
L
A
R
M
S
(
H
O
L
D
2
s
)
B
S
E
N
5
4
-
2
:
1
9
9
8
B
S
E
N
5
4
-
4
:
1
9
9
8
B
S
E
N
1
2
0
9
4
-
1
:
2
0
0
3
C
L
A
S
S
-
A
E
X
T
I
N
G
U
I
S
H
A
N
T
R
E
L
E
A
S
E
P
U
L
L
D
O
W
N
A
N
D
P
R
E
S
S
B
U
T
T
O
N
Sounders must be equipped with an in-built
blocking diode that prevents the sounder from
taking power when the output is in the
supervising condition.
An End-of-Line Resistor (EOLR) of value
10,000Ω ½ Watt must be fitted to the last
sounder / bell.
Ensure that cable of appropriate conductor size is
used to maintain the required sounder operating
voltage under the minimum battery voltage
condition
– see below for calculation.
EOL
10k ohm
EOL
10k ohm
EOL
10k ohm
SDR-1 SRD-2 SDR-3
GENERAL FIRE ALARM
FLOODING ZONE ALARM
TYPICAL
2.3.5.5.1 Intrinsic Safe Arrangement
The Sounder Circuit can be configured for use
with Intrinsic Safety sounders and barriers.
The recommended isolation barrier is a MTL
Model: 778ac
Only use intrinsic safe sounders. The number of
devices permitted and cables will depend on the
IS classification
– refer to the sounder
manufacturers’ information for further details.
EOL
10k ohm
SDR-1 SRD-2 SDR-3
+
–
Isolation
Barrier
+
–
IS Sounders - Polarised
SAFE AREA
HAZARDOUS AREA
7
Due to the isolation barrier internal resistance, intrinsic safe circuits are not monitored in accordance with the circuit impedance monitoring
requirements of EN54-13.
8
By default, SNDR1 & SNDR2 are for configured for general fire alarms. SND3 is dedicated to the extinguishant alarm (flooding zone)
output in accordance with EN12094-1.
9
TOTAL OUTPUT LOAD (continuous) must not exceed panel supply rating
– maximum 2A.
