5-35
System Manual
C79000-G8576-C199-06
The controls and indicators are arranged on the front plate of the CPU
module:
CPU 928B
QVZ
ADF
ZYK
BASP
RUN
STOP
RESET
SI2
OVERALL
RESET
Receptacle for
User Memory Submodule
Momentary-Contact Mode Switch
Mode Switch
LEDs (green)
LED (red)
Fault Indicator LEDs (red)
PG Interface, 15-Pin
Interface SI 1
Release Lever
Locking Pin
Order Number and Version
SIEMENS
6ES5928-3UB21
Interface Fault Indicator LED (red)
Interface Fault Indicator LED (red)
Interface 1
Interface 2
Receptacle for Interface Submodule
Interface SI 2
Figure 5-5 Front Plate of the CPU 928B-3UB21
Controls and
Indicators
CPUs, Memor
Cards, Memor
Submodules, Interface Submodules
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