Clear-Com SB-704 - Manual (Page 28)

S B - 7 0 4 M A I N S T A T I O N 2 - 1 0
Figure 2-6: Accessory Connector DB-15F - Rear View
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 which
is active if the function has been activated with an option DIP switch and a
talk is active on that channel.
Refer to the illustration 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 amps of DC current at 24 VDC and are electrically isolated from the
rest of the station.