Clear-Com MS-702 - Manual (Page 15)

C l e a r - C o m ®
M S - 7 0 2 T w o - C h a n n e l M a i n S t a t i o n I n s t r u c t i o n M a n u a l
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17. Power Switch: The power switch can be used to turn AC power to the
MS-702 on and off. When in the on position, the front-panel talk buttons
illuminate blue.
20. AC Power Connection: An IEC type 320 connector is provided to
interface to the appropriate AC power cord to be used. Voltages from 90
to 240 VAC at 50 or 60 Hz are acceptable. The MS-702 will automatically
adjust for the power applied, so there are no manual switches to set power
line voltage or frequency.
21. Intercom Line Connection: The MS-702 contains three 3-pin male XLR
connectors for each intercom line. These connectors are wired in parallel.
Any single-channel station or channel of a multi-channel station
connected on a line plugged into channel A of the MS-702 will be “party
lined” with all the other stations on that channel. In a multi-channel
system, the goal is to assign specific people to the correct group (i.e. the
other people they need to be in contact with the most). This is particularly
important when the party-line users are on a single-channel beltpack or
station, less so if they are on multi-channel stations. The pinout of the
intercom connectors is as follows:
Pin 1 --- Ground (shield)
Pin 2 --- Power (+30 VDC)
Pin 3 --- Audio
22. Program Input: A 3-pin XLR female connector provides the main
program input to the station. Program can be fed to the headphone or
speaker as well as to either or both of the intercom channels. The level to
the speaker or headphone is controlled by the program level control. The
program on-off-intrpt switches control whether each intercom channel
receives program audio. The program audio levels on each intercom
channel can be adjusted using the individual program-level trimpots. The
program input accepts a balanced or unbalanced line-level audio signal
from -20 dBv to +10 dBv. An option is to feed program audio to the
announce output. This is selected by setting jumper JP2 on the main
board to the on position. When this option is selected, a 0 dBv signal on
the program input will produce a 0dBv signal on the announce output.
The pinout of the program input connector is as follows:
Pin 1 --- Ground (shield)
Pin 2 --- + Signal
Pin 3 --- - Signal
23. Announce Out: A 3-pin XLR male connector is provided as a feed to a
studio PA amplifier. Pressing the announce button on the front panel
places the audio from the selected headset or panel microphone on the
annc out rear-panel connector. Optionally, pressing the announce button
can also disconnect the selected headset or panel microphone from the
intercom line(s). This option is controlled by the interrupt announce
option switch. Simultaneously, if the program audio feed to the announce
output is enabled, it is interrupted by the announcement. Program audio
feed to the announce output is selected by setting jumper JP2 on the main
board to the on position. The pinout of the announce out connector is as
follows: