Siemens S5-135U/155U appendix Slots, Controller, Slot Requirement

Notes on Using this Manual	1
and on the CE Symbol

Notes on Using this Manual

The S5-135U/155U PLC is a member of the family of SIMATIC S5 programmable (logic) controllers. The controller can be used in single and in multiprocessor operation with up to four CPUs. In multiprocessor operation, each CPU processes its individual user program independently of the other CPUs (multicomputing).

CPUs Available The following are available as CPUs:

CPU 948	for fast word and binary signal processing especially
	fast double-word and floating point processing and for
	large programs with a high storage requirement;
	programming in STEP 5.
	When you use a CPU 948 you have an S5-155U PLC.
CPU 928B	for fast word and binary signal processing and for
	communication; programming in STEP 5.
CPU 928	for fast binary signal processing and for word
	processing; programming in STEP 5.
CPU 922	for word processing (computing controlling
(R processor)	monitoring signaling); programming in STEP 5.

Slots	You can combine the CPUs arbitrarily at the CPU slots in the central
	controller:

CPU

CPU 948/CPU 928B/CPU 928

CPU 922/CPU 928-3UA21/

CPU 928B-3UB21

CPU 948B-3UA13/ -3UA23

Slot Requirement

2slots

1 slot

System Manual	1-1
C79000-G8576-C199-06