Siemens S5-135U/155U appendix Cpu

Central Controllers and Expansion Units Power Supply Units

The modular packaging technique allows variable configuration of a CC with modules and its adaptation to the particular automation task.

The various modules carry out the following tasks:

SCPU

The CPU processes the input signals of the PLC according to the user program, and emits the results as output signals. The following CPUs can be used in the S5-135U/155U PLC

±CPU 948

±CPU 928B

±CPU 928

±CPU 922

SCoordinators

By using a coordinator, you can configure the S5-135U/155U as a multiprocessor controller with up to four task-oriented CPUs in different combinations. Each CPU processes its program independently of the others.

SI/O modules

The I/O modules provide the link to the process.

SIP module

The intelligent I/O modules (signal pre-processing modules) off-load the CPU by independently executing compute-intensive tasks such as controlling, counting and positioning.

SInterface modules (IMs)

If your CC has insufficient slots to insert all the modules required for your automation task, you can increase the number of modules with expansion units. The IM modules provide the link between central controller and expansion units.

SCP module

CP modules allow point-to-point communication for data interchange between two PLCs, between one PLC and an external unit, between one PLC and a SINEC bus system or between one PLC and the COROS operator control and process monitoring system. You can use additional CP modules, such as the CP 581, CP 516, for the acquisition, storage, administration and preprocessing of large volumes of data.

SVP module

VP modules enable the local acquisition and displaying (visualization) of process data of a PLC of the SIMATIC S5.

System Manual	4-5
C79000-G8576-C199-06