20:15 Jan 15 

Circuit board (in a computer) is another possibility I could think of, but would rather exclude it as those are usually called kort in Swedish, rather than central.

20:08 Jan 15 

These are specifications for a software program to run an artillery system (Gun Control Computer). This section involves testing the system. The surrounding sentence is:

Gun Control Computer skall automatiskt stänga av pjässystemet efter 1 s vid följande fall:
• Temperaturlarm från kopplingscentral (GCL) i mer än 10 minuter och temperaturövervakning aktiverad.

08:30 Jan 15 

Hello

You really do need to give some context. To show you why, look at the swedish synonyms and you see why

Good luck

http://synonymer.cc/search/kopplingscentral?w_lang=ALL