Siemens Simatic S7-400 - Page 472

Thermocouples to resistance thermometers
Connecting, 218
Training center, 5
U
UC
Meaning, 438
UCM
Meaning, 438
UH
Meaning, 439
Uiso
Meaning, 439
Underflow
Analog input module, 226
Testing, 292
Ungrounded operation
RS 485 repeater, 390
UR1
Design, 29
Specifications, 30
UR2
Specifications, 30
UR2-H
Design, 31
Specifications, 32
User program
Parameter assignment, 395
USR
Meaning, 439
V
Vibrations, 24
Reducing, 24
Voltage sensors
Connecting, 207
Vs
Meaning, 439
Vs Sensor supply
Short-circuit, 107
W
Wire break
Analog input module, 225
Digital module, 92
Wire break monitoring
Analog input module, 201
Digital input module, 87
Digital output module, 88
Ensuring, 106, 116
SM 431, AI 16 x 16 Bit, 291
Wiring
24 VDC fan subassembly, 384
SM 421, DI 16 x AC 120 V, 110
Wiring and block diagrams
SM 421, DI 16 x UC 120/230 V, 120
Wiring diagram
SM 422, DO 16 x AC 20-120 V/2 A, 154
SM 422, DO 16 x DC 20-125 V/1.5 A, 133
WR_DPARM
SFC 56, 395
WR_PARM
SFC 55, 395
Index
S7-400 Automation System Module Data
472 Reference Manual, Ausgabe 11/2016, A5E00850736-08