Redback A 4567C Operating Manual page 7

Redback A 4567C 10 Zone Line Monitor
®
2.3 Monitoring the Faults
When the A 4567C is switched on the unit will pause for about 10 seconds to allow the protected zones to be checked
for their condition.
If there are no faults with any of the speaker lines then all the LED's should be green. If a fault is found on any of the
zones the buzzer will sound and the "Cancel" switch LED will flash. The faults on the lines can either be a "Short"
signified by a red LED on the zone with the fault, or an "Open" circuit condition signified by an orange LED on the zone
with the fault.
To cancel the buzzer simply press the "Cancel" switch. NOTE : The fault indicators will remain on after the buzzer is
cancelled.
Any new fault conditions will result in the alarm tone sounding again and the "Cancel" switch LED to illuminate. From
then on, no matter how many times the cancel button is pushed the A 4567C will go into alarm mode any time there is a
new fault condition on any of the zones.
The alarm will not sound again if a zone goes from a fault condition to good condition.
2.4 Remote Monitoring Of Faults
The fault status of the zones can be monitored remotely by connecting an external buzzer or warning light to the 24V DC
switched outputs. Other options for remote monitoring include using external relay boards such as the S 4444 24V relay
board or the S 4455 DIN rail relay box. These would be suitable for connection to a Fire Indicator Board which requires
voltage free closing contacts for triggering.
There are three sets of 24V DC switched output terminals available on the rear of the A 4567C.
Combined 24V DC Output:
The first is a combined 24V DC output which is activated when any fault is active. i.e. An "Open" or "Short" condition
on any zone. The terminals provided can be used for "Normal" or "Failsafe" modes. The output terminals have a N/O
(normally open), N/C (normally closed) and a ground connection. In this configuration 24V appears between the N/O and
ground terminals when this output is activated. When this output is not active 24V appears between the N/C and ground
terminals.
Open 24V Output:
This is a 24V DC output which is activated when any zone goes into an "Open" fault condition. The terminals provided
can be used for "Normal" or "Failsafe" modes. The output terminals have a N/O (normally open), N/C (normally closed)
and a ground connection. In this configuration 24V appears between the N/O and ground terminals when this output is
activated. When this output is not active 24V appears between the N/C and ground terminals.
Short 24V Out
This is a 24V DC output which is activated when any zone goes into a "Short" fault condition. The terminals provided can
be used for "Normal" or "Failsafe" modes. The output terminals have a N/O (normally open), N/C (normally closed) and a
ground connection. In this configuration 24V appears between the N/O and ground terminals when this output is
activated. When this output is not active 24V appears between the N/C and ground terminals.
The A 4567C can be connected to an External Indicator Board by using the optional A 4568 Interface Box. This interface
box has ten voltage free, closing contact outputs suitable for triggering an external indicator board. The A 4568 is
connected to the A 4567C via a CAT5e cable as shown in Fig 3.
The A 4567C can also be remotely monitored using the A4576 wall plate, which could be connected to the combined 24
V switched output of the A 4567C as shown in Fig 3. Whenever any fault conditiion occurs 24V will become active from
these terminals and will trigger the buzzer on the wall plate. NOTE : Cancelling the buzzer on the wall plate does not
cancel the buzzer on the A 4567C LMU.
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