4
Installation of the RPS11
Free Standing
The RPS11 can be operated as a free standing unit without requiring any special cooling arrangement, but should not be
accidentally or deliberately covered in any way. Always stand the unit on a firm flat surface well away from any soft furnishings
or carpet.
Rack Mounting
The RPS11 is designed as a 19 inch rack mount unit and will occupy 3U (5.25 inches) of rack space.
An important consideration when rack-mounting the unit is the need for natural convection of air flow over the whole unit.
Good ventilation below the unit, in the floor or back of the rack, will ensure a path for continuous air flow.
Other equipment in the rack which is known not to produce a significant amount of heat should be mounted below the unit.
Equipment which also relies on good air flow within the rack (i.e. most power amplifiers and other power supplies) should be
given due consideration and some space should be provided between such units and between the RPS11 unit. Forced convection,
by means of a fan-tray, may be desirable in this situation.
Location
As with any power supply 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 hum pick-up. For this
reason the unit is provided with a long (3m) output cable to enable it to be positioned away from the mixing console. For the
same reason, when rack-mounting it is preferable to avoid locating the unit adjacent 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 RPS11. The console chassis is earthed, to the mains earth, via the power supply. When rack-mounting the RPS11 care should
be taken to avoid any possible “ground loops” in the system which would introduce audible hum to otherwise clean audio signals.
Ground loops may 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 RPS11 chassis are in
electrical contact through the fixing rails they share in the rack. The RPS11 has audio 0V and mains earth connected internally.
Using the RPS11
ALWAYS MAKE SURE THAT THE POWER SUPPLY HAS BEEN SET TO THE SAME AC
MAINS VOLTAGE AS PROVIDED FROM THE MAINS SOCKET OUTLET
Always switch the power supply off before connecting or disconnecting the console power cable, removing or installing modules
and servicing. In the event of an electrical storm, or large mains voltage fluctuations, immediately switch off the power supply
and disconnect from the mains supply.
During normal operation some heat is generated. This is dissipated by the rear heatsinks and chassis ventilation.
DO NOT COVER THE UNIT DURING OPERATION
