Bosch CL300 Manual page 121

Flexible Automation
4.8 Intelligent System Modules
4.9 Intelligent Peripheral Modules
The CL300 is a programmable logic controller (PLC) system with
coprocessing capabilities, which allows the use of intelligent system
modules.
These intelligent system modules are designed for communication with
other PLC systems or computers and can only be connected to the sys
tem bus; they include the following modules:
R301 Computer Interface Module
D
DB301 Diagnostic Module (in preparation)
D
The intelligent system modules work largely independent of each other
and of the central processing unit. This allows to offload tasks from the
central processor, which results in shorter response and cycle times in
parallel processes.
In addition to the use of the intelligent system modules R301 and DB301,
the CL300 permits the use of intelligent peripheral modules which, how
ever, can only be connected to the peripheral bus. Among these are the
following:
PU401 Positioning Unit (description P .−No. 3733)
D
EZ50 External Counter Module (description P .−No. 3893)
D
System Modules
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