BS EN 54-21:2006 pdf download – Fire detection and fire alarm systems — Part 21: Alarm transmission and fault warning routing equipment 5.3Indication of signals The following signals shall be indicated at the routing equipment by separate light-emitting indicators for a)and b). Alternatively, the signals can be indicated at the ClE, in which case it is not necessary to indicate thesignals at the routing equipment. a) The received acknowledgement signal from fire alarm receiving centre as defined in EN 50136-2-1:1998,5.5. b) At least one common fault warning shall be used to indicate the following: 1) if the acknowledgement signal is not received at the routing equipment within 100 s for type 1 and240 s for type 2 (see Annex A, Table A.1) of the initiation of the transmitted fire alarm signal, a fault warning shall be given; 2) a fault warning indicating a failure within the routing equipment (e.g. power supply failure), required to be indicated in accordance with this standard; 3) a fault warning indicating a failure within the alarm transmission network; 4) where the routing equipment is located in a separate enclosure from the CIE, an open circuit or short circuit of the interconnection between the routing equipment and the CIE shall be indicated atthe CIE and a fault warning signal sent to the alarm receiving centre. 6 Alarm transmission and fault warning systems requirements The performance requirements of transmission systems shall be as specified in Annex A.The verification of this performance is detailed in Annex B. 7 Design requirements 7.1General requirements and manufacturer’s declarations The routing equipment shall comply with the design requirements of 7.3 relevant to the technology used.Some requirements can be verified by testing.Others (e.g. long-term reliability of the routing equipment) canonly be verified by inspection of the design and its accompanying documentation (product or systemspecification, reports etc.). ln order to assist the process of design inspection, the manufacturer shall declare the following in writing: a) that the design has been carried out in accordance with a factory production control system,which incorporates a set of rules for the design of all elements of the routing equipment; b) that all the components of the routing equipment have been selected for the intended purpose and are expected to operate within their specification when the environmental conditions outside theenclosure of the routing equipment comply with class 3K5 of EN 60721-3-3:1995. 7.2Documentation 7.2.1 The manufacturer shall prepare installation and...
Download Address
Download