Karel DS200, Техническое справочное и монтажное руководство

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DS Series PBX Technical Reference And Installation Guide
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VII.2. EX200 EXPANSION MODULES
Definition:
The EX200 is a module that consists of an extension or line card (EX200B), the appropriate
connection card (the CON card) and the cable (CBL-16 or CBL-8.)
The figure below illustrates the structure of the EX200B Expansion Module Card.
1. EX200B Card 4. Front Card Cover 7. Backplane Connector
2. CON Card Connectors 5. Card Fixing Click
3. CON Card Fixing Clicks 6. Card Removing Latch
Technical Information:
All EX200B cards include some circuits such as PCM frame signal buffers, micro controller
and ICC (Intra-rack Communication Controller).
Each EX200B card also has over-current protection circuits against currents running on it.
For example: Since the analog extension module makes use of the –48 VDC, -5VDC and
+5VDC feeds of the system, there are three separate over-current protection circuits on it.
ICC is also an essential part of EX200B cards. Distributed CPU structure is maintained by
the Intra-rack Communication Protocol (ICP), which is an ISDN-like protocol. ICC is the
communication structure that actualizes the communication between the main CPU of the
system and the modules.