Tb4 - audio and low voltage control terminal block, P1 - front cover wire harness connections, P3 - balanced / unbalanced jumper – GAI-Tronics 400-001 RigCom Stations User Manual
Page 11: Sw1 - master/slave switch
Pub. 42004-376C
Model 400-001 and 400-002NS RigCom Stations
Page 11 of 22
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TB4 - Audio and Low Voltage Control Terminal Block
The following is a list of connections for the low voltage control and audio signal terminal block, TB4.
Name Pin
No.
Description
Aux Mic+
1
Positive terminal for the auxiliary microphone.
Aux Mic–
2
Negative terminal for the auxiliary microphone.
Ext Cont+
3
Talk/listen control signal for Master/Slave operation. No connection in
Common Line mode.
Ext Cont–
4
Ground reference for talk/listen control signal for Master/Slave operation. No
connection in Common Line mode or UNBAL audio configuration.
Shield
5
Ground reference for shield terminations.
Audio+
6
Positive side of the audio port line during 600-ohm or 15-kilohm termination
configuration.
Audio–
7
Negative side of the audio page port line during 600-ohm or 15-kilohm
termination configuration.
Footswitch+
8
Positive side of auxiliary footswitch that operates as the local push-to-talk
switch.
Footswitch–
9
Negative side of auxiliary footswitch that operates as the local push-to-talk
switch.
P1 - Front Cover Wire Harness Connections
Plug in the front cover wire harness connector at P1. Refer to Figure 4.
P3 - Balanced / Unbalanced Jumper
Jumper P3 allows the installer to configure the unit for balanced or unbalanced audio connections. If the
header is installed in the BAL position, the assembly is configured for a balanced audio input signal
operation. If the header is installed in the UNBAL position, the assembly is configured for an unbalanced
input signal. In systems where the external control signal is single-ended, such as previous GAI-Tronics
Model MS39xx RigCom Stations, the system must be set up as an unbalanced system.
SW1 - Master/Slave Switch
Switch SW1 allows the installer to configure the unit as a Slave or Master unit. If the switch is in the
SLAVE position, the unit is configured as a Slave. If the switch is in the MASTER position, the unit is
configured as a Master. For Common Line operation, the switch must be in the MASTER position.