BSS Audio MSR-602/604II Owner's Manual - Manual (Page 14)

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MSR-600 II Series
The audio connections to the MSR-604 II are via XLR style connectors
on the front and rear panels and their wiring configuration is as shown
in figure 5.
Attention must be given to maintaining a consistent earthing system for
safe and noise free operation. Please refer to section 4.2 for a fuller
explanation and design guides.
This is electronically balanced, non floating and is for direct connection
to the microphone, DI box or other source of programme. The input is
fully RFI suppressed and has excellent common mode rejection
performance.
Care should be taken to ensure continuity of the pin 1 earth connection.
The 48v phantom powering appears across this input when the channel
phantom switch is operated. (Refer to section 3.2)
This is electronically balanced, non floating and should be connected to
the ‘front of house’ mixing console or main control area. The remote
attenuator facility looks at this connector for detection of phantom power
voltage. This output should not be connected to an unbalanced input.
For consistent remote attenuator switching and microphone screening, it
is important that the pin 1 earth connection is maintained. (See section
4.5 for configuring the output drive level.)
This is electronically balanced, non floating, and should be connected
to the stage monitor mixing console or ancillary console which is being
operated within the same grounding system.
This output should not be connected to an unbalanced input.
It is probable that the pin 1 earth connection will need to be
disconnected at this point to avoid earth loops. (See section 4.5 for
configuring the output drive level.)
These two identical outputs are actively buffered, fully transformer
balanced and floating with primary/secondary isolation of 2.5kV. They
are for connection to any other facility requiring a signal and are totally
isolated and independent.
There is no connection to the pin 1 earth and all cable screening should
be derived from the receiving end.
It is also important to ensure there is no earth connection to the shell
of the mating female connector as this would make connection to the
MSR-602 II chassis ground and cause potential ground loops.
Audio Connections
3.3 Audio
Connections
INPUT (REAR PANEL):
FEED 1 AND FEED 2
(FRONT PANEL):
MON OUT (REAR PANEL):
MAIN OUT (REAR PANEL):