Chapter 8: Installation 8-13
Inter-Unit Scanner
Cable
The minimum bends permitted are:
Minimum bend, light cable 60 mm (~2.5 in) radius
Minimum bend, heavy cable 82 mm (~3.75 in) radius
The length of the supplied cable should be sufficient to complete the cable run
required on most small vessels. For longer runs, additional or replacement
cables are available, which have 4 power cores to minimize voltage drops over
the longer cable run: these optional cables include 5 m and 10 m extension
cables, and a 25 m replacement cable.
The maximum inter-unit cable length is limited by the minimum supply
voltage and the cable type (2 or 4 power cores): if a mix of light and heavy
cables is used, only 2 power cores are connected through.
Note: For vessels with 24 V power systems, any combination of inter-unit ca-
bles can be used.
For vessels with 12 V power systems, the recommended cable(s) for different
run lengths are given in the following table, which assumes a minimum supply
voltage of 10.7 V (the lowest voltage likely to be reached by a 12 V battery in
normal marine use). Do not use cable combinations that are not included in
the table.
Table 8-4: Recommended Inter-Unit Cable(s) for Vessels with 12 V Power
Systems
Refer to the packing list in Section 1.2 for cable part numbers.
Note: This table applies to systems using the standard 1.5 m power cable. If
you extend the power cable you may need to select different inter-unit ca-
ble(s), as discussed in Power Cable on page 8-11.
Inter-Unit Cable
Length Required (m)
Display/Scanner Package
E52026 E52027
E52041 E52042
10 Std 10 m light N/A
15 Std + 5 m ext Std 15 m light
20 Std + 10 m ext 25 m assembly
25 25 m assembly 25 m assembly
30 25 m + 5 m ext 25 m + 5 m ext
35 25 m + 10 m ext 25 m + 10 m ext
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