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Siemens Simatic S7-400 User Manual

Page 349

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Analog Modules

5-133

S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07

Technical Specifications of the SM 431; AI 8

16 Bit

Dimensions and Weight

Dimensions W

H

D

(in millimeters)

25

290

210

Weight

Approx. 650 g

Data for Specific Module

Number of inputs

8

Length of cable

Shielded

200 m

Voltages, Currents, Potentials

Isolation

Between channels and
backplane bus

Yes

Between the channels

Yes

Permitted potential difference

Between the inputs (U

CM

)

120 VAC

Between M

ANA

and

M

internal

(U

ISO

)

120 VAC

Insulation tested with

1500 VAC

Current consumption

From the backplane bus

Max. 1200 mA

Power dissipation of the
module

Typ. 4.6 W

Analog Value Generation

Measuring principle

Integrative

Integration time/conversion
time/resolution (per
channel)

(Does not go into the
response time)

Parameters can be
assigned

Yes

Integration time in
milliseconds

2.5

16.7

20

100

Basic conversion time
including integration
time in milliseconds

10

16.7

20

100

Resolution in bits (incl.
overrange)

16 bits

Noise suppression for
frequency f1 in Hz

400

60

50

10

Basic execution time of
the module, in ms (all
channels enabled)

10

16.7

20

100

Smoothing of the measured
values

Parameters can be
assigned in 4
stages

Suppression of Interference, Limits of Error

Interference voltage suppression for f = n

(f1

"

1%),

(f1 = interference frequency) n= 1.2 ...

Common-mode
interference
(U

CM

< 2.5 V)

> 130 dB

Series-mode noise
(peak value of noise
< nominal value of input
range)

> 80 dB

Crosstalk between the
inputs

> 130 dB

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