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Bosch Security Systems
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Digital Congress Network
| TCB 4 Upgrade Kit LBB 3519/20 | Chapter 1. Upgrade Kit LBB 3519/20
FIGURE 1-2 Internal view of CCU after upgrade
Port 2
Port 1
9-pole D-type connector(s)
Ribbon cabling
DIP-switch S14
DIP-switch S9
6 x securing screws
Trunk Communication Board TCB4
Connection to I/O board
Connection to I/O board