Clear-Com HB-704 - Manual (Page 11)

H B - 7 0 2 / H B - 7 0 4 T W O - A N D F O U R - C H A N N E L 1 - 5
• Switch 1—Latch Disable. Setting the latch disable switch to the on
position will disable the latching function of the talk button. In this
mode, the talk button must be held in continuously while the operator
is talking.
• Switch 2—Long Line. If a long cable run is unavoidable and
approaches 1,000 ft. (305 m) or more, set the long line option jumper
to the on position. The ability to set a sidetone null depends upon
properly setting this switch.
8. Intercom Line Connection: The HB-702 and HB-704 contain a
seven-terminal, plug-on connector for intercom line connection. This
connector is intended to be unplugged from the circuit board when
connecting the intercom line(s), then plugged back on when the wiring is
completed. If less than the maximum number of intercom lines are to be
connected to the intercom connector, link unused intercom inputs to a
connected input with jumper wires. The connections for each pin are
visible on the circuit board when the connector is unplugged. The pinout
of this connector is as follows:
Pin 1--- (NC)
Pin 2 --- Channel A audio
Pin 3 --- Channel B audio
Pin 4 --- Power
Pin 5 --- Ground (shield)
Pin 6 --- Channel C audio (HB-704 only)
Pin 7 --- Channel D audio (HB-704 only)
HB-702/HB-704
Cable Wiring:
HB-702/HB-704
Intercom Connector XLR
Connectors
Channel A
Channel B
Pin 1
Channel C
Channel D
Pin 7
1
1
1
1
3
3
3
3
2
2
2
2
HB-704
only