Allen & Heath RPS14 - Manual (Page 6)

6 RPS14 User Guide
Installation
Free standing
The RPS14 can be operated as a freestanding unit for shelf or floor operation. Ensure adequate air flow around
the unit. It must not be covered in any way. Always stand the unit on a firm flat surface well away from any soft
furnishings or carpet.
Rack mounting
The RPS14 is designed as a 19 inch rack mount unit and will occupy 2U (3.5 inches) of rack space. The fast feet
may need to be removed before rack mounting. Retain feet for future use.
An important consideration when rack-mounting the unit is the need for natural convection of airflow around the
unit. Good ventilation below the unit, in the floor or back of the rack, will ensure a continuous path for airflow.
Rack equipment known to produce a significant amount of heat should not be mounted directly below the power
supply unit. Equipment which also relies on good airflow within the rack (i.e. most power amplifiers and other
power supply units) should be given due consideration and some space should be provided between such units
and between the RPS14 unit. Forced convection, by means of a fan-tray, may be desirable in some situations.
Location
As with any power supply unit that contains a mains voltage transformer, it is preferable to provide a degree of
physical isolation of the unit from other equipment, particularly that which carries low level audio signals, to avoid
any possible interference pick-up. For this reason power supply units supplied with Allen & Heath ML series
mixing consoles are provided with a long (2.9m) output cable to enable them to be positioned away from the
mixing console. Backup power supply units, bought separately, are provided with a shorter (0.75m) output cable
to combine power supply units. For the same reason, when rack-mounting it is preferable to avoid locating the
unit next to signal processing equipment.
Earthing
Finally, some consideration should be given to the earthing arrangement of the system, at the centre of which is
the console and the RPS14. The console chassis is earthed to the mains earth via the power supply unit. When
rack-mounting the RPS14 care should be taken to avoid any possible “ground loops” in the system which may
introduce audible hum or buzz to otherwise clean audio signals. Ground loops occur where signal processing
equipment patched to the console, has its signal earth connected to the equipment chassis. A ground loop is
formed if the chassis of the signal processing equipment and the RPS14 chassis are in electrical contact through
the fixing rails they share in the rack. The RPS14 has audio 0V and mains earth connected internally.
Fitting in a rack
RPS14 ALLEN&HEATH
443mm (17.4")
310mm (12.2") 374mm (14.7")
88mm
3.5"
2U
92mm
3.6"
483mm (19")
The RPS14 is supplied ready for use free standing.
For rack mounting remove and retain the four rubber
feet.
Do not obstruct the ventilation slots.
Ensure adequate air flow around the RPS14.
Do not install the unit directly above or
below other equipment.
Do not remove the cover of the RPS14.
There are no user serviceable parts inside.