Advanced Electronics Ex-3000 Series - Sounder; Monitored Output Circuits

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2.3.4.4.3 Intrinsic Safe Arrangement
The Zone Circuit can be configured for use with
Intrinsic Safety detectors and barriers – see
programming section.
The recommended isolation barrier is a
PEPPERL+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.
2.3.4.5 Sounder / Monitored Output Circuits
Three conventional 24V DC sounder style output
circuits are provided.
18.0 – 28.0 V DC, 1.0A
3
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 3.3.2 for programming).
SUPPLY
SN DR
- 1 -
SNDR
- 2 -
S N D R
- 3 -
M O D E
S e l e c t
M anual
Trigger
HOLD
Sounder 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
10,000 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
2.3.4.5.1 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 detectors and call points.
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
3
TOTAL OUTPUT LOAD (continuous) must not exceed panel supply rating – maximum 2A.