Siemens S7-400 ユーザーズマニュアル

5-74

S7-400, M7-400 Programmable Controllers Module Specifications

A5E00069467-07

Interrupts

None

Diagnostic functions

None

Substitute value can be applied

No

Input range (rated values)/input
resistance

•

Voltage

"

 1 V/200 k

"

 10 V/200 k

1 V to 5 V/200 k

•

Current

"

 20 mA/80 

4 mA to 20 mA/80 

•

Resistors

0 to 600 

; of use up

to 500 

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

  

You set the mode of operation of the SM 431; AI 8 

 

 13 Bit in STEP 7.

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

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

Only in the CC (central controller) is it possible to start up the analog modules with the default settings.