BSS Audio MSR-602/604II Owner's Manual - Manual (Page 19)

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the MSR-602 II. The MSR-602 II has a permanent safety ground con-
nection via the power cord.
Please read section 4.2 for discussion of grounding of the electronic
0v.
The MSR-602 II power supply unit, unlike its predecessor has been
designed for mounting at the TOP of a rack, above the MSR-604 II units
it powers. In a properly installed MSR system mains induced hum from
the PSU will be unmeasurable.
If a power supply unit needs to be mounted below a MSR-604 II, the
system should be checked for mains induced hum. The following steps
may be taken to reduce it.
a) Leave a gap of at least 1U between the PSU and the closest MSR-604
II.
b) Contact your BSS agent to obtain a mumetal shield which may be
affixed to the top cover plate of the MSR-602 II.
c) Reduce the number of units in the system. (The stray magnetic field is
proportional to the current demanded from the PSU.)
In all cases, the MSR-602 II and the MSR-604 II’s MUST be fully
supported along their depth. For touring system, failure to observe this
precaution will cause eventual metal failure of the MSR-II cases which
will not be covered by the guarantee.
The physical dimensions and mounting points for the MSR-604 II and
MSR-602 II are identical. They are shown in figure 6.
In large touring systems, it is envisaged that the rear panel input and
output connectors will be wired into a multiway distribution panel
forming part of the same rack. In this way, all cabling for the main
system is kept tidy and away from the front of the unit. The isolated
feeds appearing on the front of the unit are available for the external
facilities, and their connection will not interfere with the in-house
cabling system.
As with any microphone stage box system it is advisable to avoid the
close proximity of heavy power cabling, power transformers and all
forms of lighting control equipment.
Racking