GAI-Tronics 400-003 IEC / ATEX Zone 1 RigCom Station - Manual (Page 8)

Pub. 42004-460A
Model 400-003 IEC/ATEX Zone 1 RigCom Station Page: 8 of 16
f:\standard ioms - current release\42004 instr. manuals\42004-460a.doc
09/12
System Wiring
The maximum line length for the complete system, while still maintaining maximum output signal, is
4.5 km/15,000 feet for a system with less than ten stations using 1 mm
2 wiring, with stations spaced
equidistantly, and one station in the talk mode at a time. For each station in talk mode, the signal level
reduces by half. For systems with more than ten stations refer to Figure 7 for the maximum line distance.
Number of Station per Line Length
0.00
0.50
1.00
1.50
2.00
2.50
3.00
3.50
4.00
4.50
5.00
0 5 10 15 20 25 30
Number of Stations
Li
ne L
e
ng
th
1
m
m
2
wi
re (
k
m
)
Figure 7. Number of Stations vs. Line Length