En 54 Section 7.12 Alarm Signal Dependencies - Allen-Bradley AADvance T9110 Safety Manual

• A system fault shall be audibly indicated. This indication may be capable
of being silenced.
• The cabinet of the control and indicating equipment shall be of robust
construction, consistent with the method of installation recommended
in the documentation. It shall meet at least classification IP30 of IEC
60529:1991.
• All mandatory indications shall be visible at access level 1 without prior
manual intervention such as the need to open a door.
• If the control and indicating equipment is designed to be used with a
power supply (item L of figure 1 of EN 54-1) contained in a separate
cabinet, then an interface shall be provided for at least two transmission
paths to the power supply, such that a short circuit or an interruption in
one does not affect the other.
• The EN 54-2 certification is only applicable where the system is applied
in accordance with this safety manual and EN 54-2 requirements.

EN 54 section 7.12 Alarm Signal Dependencies

7.12.1 Type A dependency (option with requirement)
Following the receipt of a first alarm signal from a fire detector, the entry to the
fire alarm condition may be inhibited until the receipt of a confirmation alarm
signal from the same fire detector, or from a fire detector in the same zone. In
this case, the first alarm state need not be indicated, and the following shall
apply:
• the mode of operation shall be configurable at access level 3 for
individual zones;
• reception of a confirmation alarm shall not be inhibited for more than
60s following the receipt of the first alarm signal. The manufacturer may
specify a time shorter than 60 s. In this case, this specification shall be
tested and verified;
• the first alarm state shall be automatically canceled within 30 min of the
receipt of the first alarm signal;
• information on the values of the configured delay times shall be
accessible at access levels 2 or 3.
7.12.2 Type B dependency (option with requirement)
Following the receipt of a first alarm signal from a fire detector, the entry to the
fire alarm condition may be inhibited until the receipt of a confirmation alarm
signal from the same fire detector, or from a fire detector in the same or a
different zone. In this case, the first alarm state need not be indicated, and the
following shall apply:
• the mode of operation shall be configurable at access level 3 for at least
individual zones;
Rockwell Automation Publication ICSTT-RM446N-EN-P - April 2018
AADvance Functional Safety System Implementation Chapter 4
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