Siemens Simatic S7-400 - Manual (Page 290)

Analog Modules
5-74
S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
Status, Interrupts, Diagnostics
Interrupts None
Diagnostic functions None
Substitute value can be applied No
Data for Selecting a Sensor
Input range (rated values)/input
resistance
•
Voltage " 1 V/200 k W
" 10 V/200 k W
1 V to 5 V/200 k W
•
Current " 20 mA/80 W
4 mA to 20 mA/80 W
•
Resistors 0 to 600 W ; of use up
to 500 W
Maximum input current for
current input (destruction limit) 40 mA continuous
Connection of the signal
sensors
•
For measuring voltage Possible
•
For measuring current
– As two-wire
transmitter Possible; with external
transmitter supply
– As four-wire
transmitter Possible
•
For measuring resistance
– With two-conductor
terminal
– With three-conductor
terminal
Possible; cable
resistance is also
measured
– With four-conductor
terminal Possible
Characteristic linearization No
5.18.1 Commissioning the SM 431; AI 8 13 Bit
You set the mode of operation of the SM 431; AI 8 13 Bit in STEP 7.
Parameters
You will find a description of the general procedure for assigning parameters to
analog modules in Section 5.7.
An overview of the parameters that you can set and their default settings are
shown in the table below.
Table 5-48 Parameters of the SM 431; AI 8 13 Bit
Parameter Value Range Default 1) Parameter
Type
Scope
Measurement
•
Measuring
method Disabled
U
Voltage
4DMU Current (4-wire transmitter)
2DMU Current (2-wire transmitter)
R-4L Resistance (four-conductor
connection)
U
Static Channel
•
Measuring
range Refer to Section 5.18.2 for the measuring
ranges of the input channels that you can
set. " 10 V
•
Interference
suppression 60 Hz; 50 Hz 50 Hz
1) Only in the CC (central controller) is it possible to start up the analog modules with the default settings.