Hubbell Gai-Tronics 370-301, Manual, Page: 6 / 10

Pub. 42004-431A
370-301 Dual Channel 600 to 30-Ohm Converter Page:
6 of 9
f:\standard ioms - current release\42004 instr. manuals\42004-431a.doc
09/09
Audio and Control Signals
The 370-301 allows access to the audio line inputs and output along with relay contacts for the VOX
detection.
Table 3. 600-Ohm Connections Channel 1, P4
Pin
Number
Pin Name
Function
1
NC
600-ohm active Normally closed connection of 600-ohm output VOX detection.
2 COM 600-ohm active Common connection of 600-ohm output VOX detection.
3
NO
600-ohm active Normally open connection of 600-ohm output VOX detection.
4 GND Ground reference for field wiring.
5
L1
600-ohm audio Bi-directional audio for 600-ohm interface
6 L2 600-ohm audio Bi-directional audio for 600-ohm interface
Table 4. 33-Ohm Connections Channel 1, P6
Pin
Number
Pin Name
Function
1
NC
33-ohm active Normally closed connection of 33-ohm output VOX detection.
2
COM
33-ohm active Common connection of 33-ohm output VOX detection.
3
NO
33-ohm active Normally open connection of 33-ohm output VOX detection.
4
GND
Ground reference for field wiring.
5 L1 33-ohm audio Bi-directional audio for 33-ohm interface
6
L2
33-ohm audio Bi-directional audio for 33-ohm interface
INTELLECTU
Table 5. 600-Ohm Connections Channel 2, P10
Pin
Number
Pin Name
Function
1
NC
600-ohm active Normally closed connection of 600-ohm output VOX detection.
2
COM
600-ohm active Common connection of 600-ohm output VOX detection.
3 NO 600-ohm active Normally open connection of 600-ohm output VOX detection.
4
GND
Ground reference for field wiring.
5 L1 600-ohm audio Bi-directional audio for 600-ohm interface
6
L2
600-ohm audio Bi-directional audio for 600-ohm interface