C.1 Control and transmission equipment for tactile alarm devices provided for people who are Deaf and hard of hearing should be designed in accordance with the principles of BS EN 54-2, other than in respect of the colors used for visual indicators.

C.2 The control and transmission equipment should conform to the requirements of the following clauses of BS EN 54-2:1997+A1.

● 5.1

● 5.2

● 5.3

● 5.4

● 5.6

● 6

● 7.6

NOTE 1 This sub clause does not apply if resetting of the control and transmission equipment is achieved by receipt of a data signal from, or by the operation of a relay dedicated to this function (i.e. not the relay that indicated the fire signal) at the fire alarm CIE.

● 8.2.1

● 8.2.2

● 8.2.3

● 8.2.4b)

● 8.2.4d)

● 8.2.4e)

● 8.2.6a)

● 8.5

● 8.6.1

● 8.6.2

● 8.6.3

● 8.7

● 8.8

● 10.2a)

NOTE 2 This sub clause applies, except that, instead of a separate light-emitting indicator, visual indication of the test condition may be given by a combination of a fault indication and an appropriate text display.

● 12.3

● 12.4.3

● 12.4.4

● 12.5.1

● 12.5.4

● 12.6

● 12.7

● 12.8

● 12.9

● 12.10

● 12.11

● 13 (excluding 13.2 and 13.7)

● 14, except that in 14a) the equipment should be marked as compliant with Annex C of BS 5839- 1:2017, and not with BS EN 54-2:1997+A1.

● 15

NOTE 3 Where Clause 15 refers to a fire detection circuit, this is to be regarded as the circuit that interconnects the control and transmission equipment with the fire detection and fire alarm system CIE.

C.3 Since BS EN 54-2:1997+A1 was not drafted to take account of tactile alarm devices provided for people who are Deaf and hard of hearing, care should be taken to ensure that each of the requirements listed in C.2 are met.

C.4 Special attention should be given to the following design considerations.

a) Mains failure or low battery condition at the control and transmission equipment should result in a suitable fault warning at the fire alarm CIE within 30 min of its occurrence.

b) All other fault conditions that are required to be identified at the control and transmission equipment in order to satisfy the recommendations of 18.2 should result in a fault warning at the fire alarm CIE within 100 s of their occurrence.

c) A visible indication should be given at the equipment by means of an independent light-emitting indicator while the equipment is supplied with power.

d) Multiple fire signals received at the equipment should not stop, or inhibit, the transmission of fire warning signals.

e) Any controls that cause transmission of fire alarm signals to cease should be capable of use only at access level 2, as defined in BS EN 54-2.

f) Repeat transmission of fire alarm signals should continue until either manual action is taken or a reset signal is received from the fire alarm CIE; repeat transmissions should not cease automatically after any predetermined period or number of transmissions.

C.5 Power supplies should conform to the requirements of BS EN 54-4

Annex C (normative) Control and transmission equipment for tactile alarm devices provided for people who are Deaf and hard of hearing