Advanced MX-4200V, Руководство пользователя

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2.6.4 Sounder Circuits
The Mx-4200V is equipped with two supervised
sounder circuits. These are denoted as Circuits A
and B.
The Mx-4400V is equipped with four supervised
sounder circuits. These are denoted as Circuits A,
B, C and D.
The Mx-4800V is equipped with two sets of four
sounder circuits (eight in total).
Each Sounder output is rated at a maximum of
1 Ampere.
The terminal connections on the base card are
shown in the diagram opposite.
S
ND
A
+
S
ND
A
–
S
ND
B
+
S
ND
B
–
Base Card Connections
–
Typical .
The sounder outputs are monitored (supervised)
for open and short circuit conditions using reverse
polarity signals. 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.
Refer to Appendix 2
– Recommended Fire Rated
Cables for further information on cable types to be
used.
+
-
Typical
Arrangement
EO
L
Typical Sounder Arrangement.
When screened cable is used, it is vital to connect the screen to the chassis / earth at the cable
gland input / earth stud in the panel. Always ensure that all segments of the cable loop have
continuity of the screen and take care to ensure that the screen is not exposed to any other
earth point (e.g. metalwork, cable trays, junction boxes, etc.).
2.6.5 Relay Circuits
Section 8.8
Fault Output.
Relay 1 is arranged for failsafe operation as standard.
The panels are equipped with two relay outputs.
These are normally programmed to activate on
Fault and Fire Alarm conditions respectively.
Each output is unsupervised with volt-free
changeover contacts rated at 30V AC/DC,
1 Ampere.
The Mx-4800V is equipped with two sets of relay
outputs (four in total).
Optional relay cards are available if additional
relays are required.
COM NC NO
COM
NO NC
RELAY 2 RELAY 1
Base card arrangement
– typical.
The Relay outputs can be used, instead of the Routing Interface Card, to provide non-monitored fire
and fault routing outputs to appropriate routing equipment.
In this case, the panel will not indicate transmission path failures to the routing equipment
– this feature
must be incorporated into the routing equipment itself. [Not fully EN54-2 compliant].
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