Siemens S5-155U System Manual page 528

Index
IM 314 .............................................................................................................................................7-19
PG submodule .................................................................................................................................5-70
power supply units...........................................................................................................................4-28
PSU 6ES5 955-3NA12....................................................................................................................4-72
RS422-A/485 submodule ................................................................................................................5-87
SINEC L1 submodule .....................................................................................................................5-93
TTY submodule...............................................................................................................................5-81
V.24 submodule...............................................................................................................................5-74
L
Labelling field .....................................................................................................8-17, 9-12, 9-41, 9-59, 9-107
LEDs
COR 923C .......................................................................................................................................6-25
CPU 922 ..........................................................................................................................................5-49
CPU 928 ..........................................................................................................................................5-39
CPU 928B........................................................................................................................................5-28
CPU 948 ..........................................................................................................................................5-13
digital input/output modules..............................................................................................................8-6
load power supply............................................................................................................................4-63
power supply units...........................................................................................................................4-39
PSU 6ES5 955-3NA12....................................................................................................................4-77
LEDs for fault indication and signalling
CPU 922 ..........................................................................................................................................5-49
CPU 928 ..........................................................................................................................................5-39
CPU 928B........................................................................................................................................5-28
CPU 948 ..........................................................................................................................................5-13
Lightning protection....................................................................................................................................3-15
Line groups....................................................................................................................................................3-7
Lithium battery
fitting in PSU ...................................................................................................................................4-34
replacing ..........................................................................................................................................4-44
Load circuit
disconnecting ...................................................................................................................................8-29
Load power supply......................................................................................................................................3-22
application .......................................................................................................................................4-61
design...............................................................................................................................................4-61
Load voltage................................................................................................................................................9-48
Location of jumpers
power supply units...........................................................................................................................4-32
PSU 6ES5 955-3NA12....................................................................................................................4-72
Locking bar ...................................................................................................................................................4-5
M
Main switch.................................................................................................................................................3-23
Measured-value representation
current measuring range 4 to 20 mA ..................................................................................... 9-30, 9-74
different measuring ranges ..............................................................................................................9-95
output current/voltage................................................................................................................... 9-116
Pt 100 ..................................................................................................................................... 9-28, 9-73
two's complement ................................................................................................................. 9-26, 9-71
value and sign ........................................................................................................................ 9-27, 9-72
Measurement with respect to ground................................................................................................ 9-82, 9-92
12 - 8
System Manual
C79000-S8576-C199-03