CPA240 Configurable Power Amplifier
Page 30 of 35
21031 CPA240 manual V1.31.doc
10 Safety Considerations
10.1 Safety Considerations for System Design and Installation.
10.1.1 Security
To comply with electrical safety regulations CPA240 amplifier must be enclosed in a form of
equipment rack or housing that is secure from access by all but trained and qualified personal.
Access should be controlled by means of a key or special tools.
10.1.2 Electrical
The electrical installation of which the CPA240 unit is part must incorporate an all-pole mains
isolating switch, with contact separation of at least 3mm.
System design must provide adequate protection and insulation of both the mains and amplifier
output lines, which may exceed 100V.
The one metre IEC mains power cord supplied with the amplifier must be protected by 10A
fusing.
Where other types of mains leads are necessary they must be BASEC or HAR approved with
connectors complying with EN60320.
The lead should also have conductor area at least 0.75 mm and be rated at 10A.
Careful consideration should be directed towards both the mains supply and distribution system
loading, the capacity of which must not be exceeded.
The Audix standby battery supply units (Models SBS241, SBS242, or SBS481) all include a
separate fuse on each 24V dc output. The fuse rating on the feed to the CPA240 should be 25A
fast acting (F 25A)
Where 24V DC standby supply other than Audix range listed are used, The DC feed to the
CPA240 should be fused at source with a supply fuse rating of 25A fast acting (F 25A H).
10.1.3 Environmental
During the normal operation of the CPA240 the amplifier can dissipate up to 270W.
The design of the enclosure must ensure that adequate ventilation provide so that the internal
ambient temperature does not exceed 40ºC. Temperatures above this may cause the amplifiers
shut down impeding audio output.
A minimum of a 1U space should be allowed above and below each amplifier for cooling.
Where standby batteries are fitted, further consideration to the equipment rack internal ambient
conditions should be taken. Battery life is significantly reduced when they are subjected to
temperatures above 25ºC.
The CPA240 amplifier should not be exposed to dripping or splashing
10.1.4 Installation
Installation of the CPA240 amplifier should be carry out in safe, clean and dry conditions
The equipment rack and supporting floor must be stable and able to deal with the significant
weight exerted by the public address and voice alarm equipment.
The CPA240 must be supported by some means other than the aluminium front panel, this is
achieved by fixed rails such as the Audix rack runner product 570.507.006 or a sturdy shelf.
