Kongsberg Seatex AIS 100, Инструкция по эксплуатации

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Seatex AIS 100 Instruction Manual, rev. 5 Installation
41
5.5 External cabling of data signals
Shielded twisted pair cables shall be used for the high-speed serial
data ports. The recommended wiring (the figures below are excerpts
from IEC 61162-2, ed. 1) is as shown on the drawings. The A, B and
C designation correspond with the data signals as listed in the tables
on the preceding pages. There may be several listeners (receivers) but
only one talker (transmitter). For long lines we recommend to use a
terminating resistor (120 Ohm between A' and B' at the receiving
end). Avoid stubs or make them as short as possible. The common
wire designated "C" is the signal ground reference and this wire shall
be isolated from the outer shielding. The outer cable shield shall be
continuous (unbroken) through the installation, but shall not be
terminated to any part of the receiver.
Figure 16 Talker and listener cabling – data/shield
Shielded twisted pair cable with third-wire is shown below. The
common "C" wire may be one wire of a pair of another port's common
connection wire "C", if they have the same destination.
Figure 17 Third wire cabling
When the AIS connection box is used, the cable shields will be
continuous from the mobile station to the external installation when
the external cables' shield is properly terminated in the nipples' metal
tongues.