Siemens S5-135U/155U System Manual page 187

Controls and
The controls and indicators are arranged on the front plate of the CPU
Indicators
module:
Figure 5-6
System Manual
C79000-G8576-C199-06
CPUs, Memory Cards, Memory Submodules, Interface Submodules
CPU 928B
Receptacle for
User Memory Submodule
RUN
Mode Switch
STOP
LED (green)
RUN
STOP
LED (red)
RÜCKSETZEN
RESET
Momentary-Contact Mode Switch
URLÖSCHEN
OVERALLRESET
Fault Indicator LEDs (red)
QVZ SI1
Interface Fault Indicator LEDs (red)
SI2
ADF
Interface 1
ZYK
Interface 2
BASP
Order Number and Release
SI2
SI1
Receptacle for Interface Submodule
Interface SI 2
PG Interface, 15-Pin
Interface SI 1
Release Lever
Locking Pin
Front Plate of the CPU 928B
5-47