Pub. 42004-376E
400-001 and 400-002NS RigCom Stations
Page 10 of 18
P:\Standard IOMs - Current Release\42004 Instr. Manuals\42004-376E.docx
08/19
Common Line System
All stations are on a common
audio path and are normally in
listen mode in the common line
configuration. Activation of a
station’s push-to-talk toggle switch
supplies its audio signal to the
common audio path. All other
units receive the audio signal and
broadcast the announcement over
their speakers. The push-to-talk
switch must be held down while
the operator talks. Releasing the
switch deactivates the microphone
and returns the unit to listen mode.
Master/Slave System
A master station controls the talk-
listen function of the slave units
through external control wiring in
the master/slave configuration.
Slave stations are in talk mode
allowing the master station to
monitor the slave’s audio when the
master’s push-to-talk is not
activated. Activation of the
master’s push-to-talk toggle switch
places the slaves in listen mode,
allowing the master to transmit
audio to the slave stations. The
Slave’s push-to-talk is not
operable, and their operation is
hands-free.
Figure 8. Common Talk Wiring Detail
Figure 9. Master/Slave Wiring Detail
