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Installation
Free standing
The MPS12 can be operated as a free standing 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 MPS12 can be mounted in a standard 19 inch rack using the optional front panel (supplied), and will occupy
2U (3.5 inches) of rack space.
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 the MPS12. Forced convection, by means of a fan-tray, may be desirable in some situations.
Location
As with any power supply unit, 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 the MPS12 power supply unit is provided with a long (2.9m) DC 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 next to signal processing equipment.
Grounding
Consideration must be given to the Grounding arrangement of the system, at the centre of which is the console
and the MPS12. The console chassis is connected to the mains earth via the power supply unit. The MPS12
has audio 0V and mains earth connected internally. For safety it is important that all equipment grounds are
connected to mains ground so that exposed metal parts are prevented from carrying high voltage which can
injure or even kill the operator. Do not disconnect the ground connection in the mains lead. It is recommended
that the system engineer check the continuity of the safety ground from all points in the system including
microphone bodies, cable shields, equipment cases, rack metalwork and so on. If audible hum or buzz is
present in the system due to a "ground loop", consult the console user guide for possible solutions.
Fitting in a rack
The MPS12 is supplied ready for rack mounting. For free standing
use, remove the 19" front panel, which is secured by four M4x8 Pozi
screws and shakeproof washers.
Do not obstruct the ventilation slots. Ensure adequate air
flow around the MPS12.
Do not install the unit directly above or below other
equipment.
Do not remove the cover of the MPS12. There are no user
serviceable parts inside.
6
MPS12 User Guide
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