Installing the power supply
The HT20470 Processor Unit is available in two versions. The DC version operates on +24 VDC while the AC version operates on 100 to 240 VAC. A power supply is required if a DC powered unit needs to work from an AC supply. The power supply offers a 24  VDC output.
Prerequisites
A suitable location for the power supply must be defined prior to installation. If you place the unit on the bridge, observe the compass safe distance.
You must be equipped with a standard set of tools. This tool set must comprise the normal tools for electronic and electromechanical tasks. This includes different screwdriver types, pliers, spanners, a cable stripper, a soldering iron, etc. Each tool must be provided in various sizes. We recommend that all tools are demagnetized to protect your equipment.
Context
The power supply can be installed in many ways.
•  You can mount it on a 35 mm DIN rail. An existing DIN rail can be used.
•  You can mount it using any means available.
Observe the following requirements to free space over, under and on each side of the unit:
•  Space above: 40 mm
•  Space below: 20 mm
•  Space on each side: 5 mm
If the adjacent device is a heat source: 15 mm
Note
The DIN rail is not included with the delivery. Mounting hardware (bolts, nuts and washers) are not included with the delivery. These are commercial items that can be purchased locally.
Power supply:
•  Manufacturer: Mean Well
•  Manufacturer’s website: https://www.meanwell.com
•  Type designation: SDR-240-24
•  Kongsberg Maritime part number488156
Procedure
1 Find a suitable location for the power supply.
2 Prepare the location and the necessary tools.
3 Observe the installation requirements.
a Make sure that enough space is made available for maintenance purposes.
b Make sure that the installation method allows for the physical vibration, movements and forces normally experienced on a vessel.
4 Make sure that the chosen location meets the installation requirements.
5 Installation using a DIN rail:
a Mount the DIN rail.
b Mount the unit using the relevant mounting hardware.
6 "Ad hoc" installation
a Place the unit in a suitable location (horizontally or vertically).
b Position and fasten the unit using any means available.
7 Connect the cables.
Note
When you connect the cables, make sure that they are all properly secured, and able to withstand the vibration and movements of the vessel.