Clear-Com MS-704 - Manual (Page 27)

M S - 7 0 4 / R M - 7 0 4 F O U R - C H A N N E L M A I N / R E M O T E S T A T I O N S
2 - 1 1
Figure 2-10: Accessory Connector
• AUXILIARY PROGRAM INPUTS: Four different program inputs, one
for each channel, are provided. These auxiliary program inputs can only be
fed directly to their associated intercom line. The only controls that affect
these inputs are the PGM-level controls associated with each channel and the
internal program interrupt switch that is active if the function has been
activated with an option DIP switch and a talk is active on that channel.
These inputs are electronically balanced with a high input impedance. Refer
to the illustration above for connection of the program inputs. Pins #5 or #14
can be used for connecting shields.
• REMOTE MIC ON/OFF SWITCH: An external momentary pushbutton
switch connected to pins #5 and #13 will duplicate the action of the front
panel mic on/off switch.
• ANNOUNCE RELAY CONTACTS: A relay is provided that activates
when the announce button is pressed and its contacts are available on the
accessory connector. The relay contacts are rated for 2.0 amperes of DC
current at 24 VDC and are electrically isolated from the rest of the station.