GAI-Tronics 400-003 IEC / ATEX Zone 1 RigCom Station - Manual (Page 7)

Pub. 42004-460A
Model 400-003 IEC/ATEX Zone 1 RigCom Station Page: 7 of 16
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System Line Balance
Each system requires termination of the audio pair wires with the 1 k/1-watt resistor (included with each
unit). The line balance resistor assembly is easily installed into the customer-supplied junction box.
N
OTE : Only one line balance resistor assembly is needed per system.
For cable runs that are approximately 1219 m (4,000 feet) or longer, it is recommended that the resistor
assembly be installed in a junction box (customer supplied) that is close to the center of the system. Refer
to Figure 5 and Figure 6. The junction box must be suitable for the applicable hazardous location in
which it is located.
Figure 5. System cable wiring less than 1219 m/4,000 feet in length
Figure 6. Master/Slave System cable wiring greater than 1219 m/4,000 feet in length