6-8
3.3 Cable inlet with EMC protection and cable support
18 pieces EMC protected tubes with inside diameter 20mm are mounted on the bottom plate.
More than one cable can be routed through each tube. On the inside of the cabinet each tube is
equipped with a clamp plate for fixation of the cable screen. Cable support is provided by
tighten a cable tie (zip tie), in the slit on the bottom of the tube, round the cable and the tube.
3.4 Grounding bolt
The bottom plate is equipped with a grounding bolt, which shall be connected to the metal
structure of the ship’s hull. The cable area of this connection shall be at least10mm
2
, preferably
using copper braid.
4 Electrical installation
4.1 General
To simplify the reading of this instruction, IEC61162/NMEA serial signals are named just
NMEA.
Closer information about IEC61162/NMEA serial signals and how to connect cables carrying
IEC61162.signals is described in document “IEC61162/NMEA0183 User Guide”.
Also see Appendix 2 (Wiring Principles) below.
All cables shall be brought into the case via the provided cable inlet tubes in the bottom plate
and all screens shall be properly terminated in the inlet tube clamp plate.
The cable screens between the Speed log Sig.Processor and the Sig. Distributor should only be
connected to the Sig. Distributor and not to the Sig.Processor. Use a shielded cable with
twisted pairs to connect the Speed Log Sig.Processor to the Sig. Distributor.
The connection terminals are positioned on the IO-PCB and the PSU-PCB. Terminals that are
stacked on top of each other have the same number with an extra letter or mark, indicating
column. For example NMEA in 1 has terminal numbers 1A, 1B and 1C, Opto out 1 has
terminal numbers 28+ and 28-.
The terminals are designed for cable areas with a cross-section from 0,5mm² to maximum 2,5
mm² terminated without end caps.
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