Siemens S5-135U/155U System Manual page 160

CPUs, Memory Cards, Memory Submodules, Interface Submodules
Controls and
The controls and indicators are arranged on the front plate of the CPU
Indicators
module:
Figure 5-4
5-20
S5-155U CPU948
RUN
STOP
RUN
STOP
SYS FAULT
RÜCKSETZEN
RESET
URLÖSCHEN
OVERALL
RESET
QVZ
INIT
ADF
SI1
ZYK
SI2
BASP
SI1 SI2
Controls and Indicators of the CPU 948
Receptacle for
Memory Card
Mode Switch
LED (green)
LED (red)
LED (red)
Momentary-Contact Mode Switch
Fault Indicator LEDs (red)
Fault Indicator LED (red)
Interface Fault Indicator LEDs (red)
Interface SI1
PG Interface, 15-Pin
Second Serial Interface SI2
Receptacle for Interface Module
Oder Number and Version
Release Lever
Locking Pin
System Manual
C79000-G8576-C199-06