Siemens S5-135U/155U appendix CPU 928B, Delayed from Version 6ES5 928-3UB12

CPUs, Memory Cards, Memory Submodules, Interface Submodules

5.4CPU 928B

This section contains the hardware description and technical specifications of the CPU 928B.

Details on programming the CPU 928B can be found in the CPU 928B

Programming Guide.

5.4.1Technical Description

Application	You can use the CPU 928B in single and multiprocessor operation in the
	S5-135U/155U central controller (see Chapter 6). Up to four CPUs can be
	used.
	The CPU 928B is universally applicable, ensuring both very fast bit
	processing and very fast word processing:
	S Cyclic
	S Time-controlled (9 different timebases)
	S Real-time controlled
	S Interrupt-driven (hardware interrupt)
	S Delayed (from Version 6ES5 928-3UB12)
	The programming language is STEP 5.
Design	The electronic circuitry of the CPU 928B is on two PCBs (basic and
	expansion boards) in the double Eurocard format. Both PCBs are screwed
	together, linked via connectors, and must not be separated. The basic board
	provides the connection to the S5 bus via two backplane connectors.
	The front plate width is 2 2/3 standard plug-in stations.

5-42	System Manual
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