NETcourse
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Alterations/Errors reserved 15/Wo/251D
Cassens & Plath GmbH, Am Lunedeich 131, D-27572 Bremerhaven, Germany, tel. +49 471 483 999 0, fax +49 471 483 999 10
www.cassens-plath.de
,
5.4) Extending / Shortening of Detector Cable
Alteration of detector cable length is possible if the total length does not exceed 35 m.
It is not recommended to disassemble the connectors because often problems are caused
by the small dimensions of the pins. The better way is to cut the cables themselves at a
suitable spot and to use a junction box.
6) Grounding
Although NETcourse has passed EMC qualification tests according to EN 60945, an
accurate grounding is necessary to avoid interferences caused by electromagnetic
radiation like UHF or VHF and electromagnetic pulses (EMP). For example radio telefones
are known to disturb the function of the electronics.
1. For this, fix the casing to the wall steel wall of the superstructure after removing
insulating paint at the rear of the casing and the adjacent wall.
2. If this is not possible use a massive copper wire and fix it on one side at the
grounding screw of the casing and on the other side at the ship´s steel hull. Take
the shortest way.
3. If such a grounding is not possible or not successful proceed as follows: Remove
the plastic insulation of the cables. Do not destroy the screening network below.
Skin the cable abt. 10 mm of length. Bring the skinned part in direct contact to the
ship’s steel. Before, remove insulating paint from the wall. Use a metallic clamp to
fix the cable. One of the grounding points should be as close as possible to where
the cable leads into the superstructure. Choose the second point (if any) as close
as possible to the control unit.
Grounding according to 3.:
10 cm
Skin cable about 10 cm. Remove insulating
paint from the surface below. Use clamp to
press grounding network of cable to metallic
steel of the superstructure.
