2
Technical Description
2.1
Modular Design
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2 - 1
2.2
Principle of Operation of the Programmable Controller
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2.2.1
Functional Units
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2 - 3
2.2.2
Program Scanning
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2 - 5
2.2.3
Central Processing Unit Description
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2 - 9
2.3
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 - 12
2.3.1
Backup Battery
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2 - 12
2.3.2
Memory Submodules
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2 - 12
2.3.3
Programmers (PG) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 - 13
2.3.4
Printers (PT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 - 13
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EWA 4NEB 811 6148-02