Siemens Simatic S7-400 User Manual download pdf (Page 318)

100

101

Analog Modules

5-102

S7-400, M7-400 Programmable Controllers Module Specifications

A5E00069467-07

Technical Specifications of the SM 431; AI 16 x 13 Bit

Dimensions and Weight

Dimensions W H D

(in millimeters)

25 290 210

Weight Approx. 500 g

Data for Specific Module

Number of inputs

• Shielded

Max. 200 m

Voltages, Currents, Potentials

Rated load voltage L+ 24 VDC (only required

for the supply of 2-wire

transmitters)

• Reverse polarity protection Yes

Power supply of the

transmitters

• Supply current Max. 50 mA

• Short-circuit proof Yes

Constant measured current for

resistance-type sensor

Typ. 1.67 mA

Isolation

• Between channels and

backplane bus

• Between the channels

• Between channels and

load voltage L+

Permitted potential difference

• Between inputs and M

ANA

)

• Between the inputs (E

)

2 VDC/2 VAC

Insulation tested with

• Between bus and chassis

ground

500 VDC

Current consumption

• From the backplane bus Max. 100 mA

• From load voltage L+

(with 16 connected, fully

controlled two-wire

transmitters)

Max. 400 mA

Power dissipation of the

module

Typ. 2 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

• Interference voltage

suppression f1 in Hz

60/50

• Integration time in

milliseconds

50/60

• Basic conversion time in

55/65

• Resolution including sign 13 bits

Smoothing of the measured

values

Not possible

Basic execution time of the

module, in ms (all channels

enabled)

880/1040

Suppression of Interference, Limits of Error

Interference voltage suppression for f = nx (f1 "1%),

(f1 = interference frequency) n = 1, 2, ...

• Common-mode

interference

< 2 V)

> 86 dB

• Series-mode interference

(peak value of interference

< rated value of input

range)

> 60 dB

Crosstalk between the inputs

> 50 dB

Operational limit (in the entire temperature range, with

reference to the input range)

• Voltage input

– " 1 V

– " 10 V

– 1 V to 5 V

" 0.65%

" 1 %

• Current input

– " 20 mA

– 4 mA to 20 mA

" 0.65%

Basic error (operational limit at 25 °C, referred to input

range)

• Voltage input

– " 1 V

– " 10 V

– 1 V to 5 V

" 0.25%

" 0.5%

• Current input

– " 20 mA

– 4 mA to 20 mA

" 0.25%

Temperature error (with

reference to the input range)

" 0.01%

Linearity error (with reference

to the input range)

" 0.05%

Repeat accuracy (in the steady

state at 25

°C, referred to the

input range)

" 0.01%

Status, Interrupts, Diagnostics

Interrupts None

Diagnostic functions None

Substitute value can be applied No

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Siemens Simatic S7-400 User Manual Page 318

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