CPUs, Memory Cards, Memory Submodules, Interface Submodules

Controls and

The controls and indicators are arranged on the front plate of the CPU

Indicators

module:

CPU 928B

QVZ

ADF

ZYK

BASP

RUN

STOP RESET

OVERALL

RESET

SI2 3UB21-6ES5928

SIEMENS

Fault Indicator LEDs (red)

Receptacle for

User Memory Submodule

LEDs (green)

Mode Switch

LED (red)

Momentary-Contact Mode Switch

Interface Fault Indicator LED (red) Interface 1

PG Interface, 15-Pin

Interface SI 1

Interface Fault Indicator LED (red)

Interface 2

Order Number and Version

Receptacle for Interface Submodule Interface SI 2

Release Lever

Locking Pin

Figure 5-5 Front Plate of the CPU 928B-3UB21

System Manual

5-35

C79000-G8576-C199-06

Page 175
Image 175
Siemens S5-135U/155U appendix Front Plate of the CPU 928B-3UB21