Siemens M7-400, S7-400 Technical Specifications of the SM 431; AI 8 13 Bit,

Analog Modules
5-73
S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
Technical Specifications of the SM 431; AI 8 13 Bit
Programming package
Associated programming
package As of STEP 7 V 2.0
Dimensions and Weight
Dimensions W H D
(in millimeters) 25 290 210
Weight Approx. 500 g
Data for Specific Module
Number of inputs
•For resistance-type sensor
8
4
Length of cable
•Shielded max. 200 m
Voltages, Currents, Potentials
Rated load voltage L+ Not required
Constant measured current for
resistance-type sensor Typ. 1.67 mA
Isolation
•Between channels and
backplane bus
•Between the channels
Yes
No
Permitted potential difference
•Between inputs and MANA
(UCM)30 VAC
•Between the inputs (ECM)30 VAC
•Between MANA and
Minternal (UISO)75 VDC / 60 VAC
Insulation tested with
•Between bus and analog
section
•Between bus and chassis
ground
•Between analog section
and chassis ground
2120 VDC
500 VDC
2120 VDC
Current consumption
•From the backplane bus Max. 350 mA
Power dissipation of the
module Typ. 1.8 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 16.7/20
•Basic conversion time in
ms 23/25
•Resolution including sign 13/13 Bit
Smoothing of the measured
values Not possible
Basic execution time of the
module, in ms (all channels
enabled)
184/200
Suppression of Interference, Limits of Error
Interference voltage suppression for f = nx (f1 "1%),
(f1 = interference frequency) n = 1, 2, ...
•Common-mode
interference
(UCM < 30 V)
> 100 dB
•Series-mode interference
(peak value of
interference < rated value
of input range)
> 40 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
" 1.0%
" 0.6%
" 0.7%
•Current input
–" 20 mA
– 4 mA to 20 mA
" 1.0%
" 1.0%
•Resistance measurement
0 to 500  fourconductor
measurement (in the range
of 600)
" 1.25%
Basic error (operational limit at 25 °5C, referred to input
range)
•Voltage input
–" 1 V
–" 10 V
– 1 V to 5 V
" 0.7%
" 0.4%
" 0.5%
•Current input
–" 20 mA
– 4 mA to 20 mA
" 0.7%
" 0.7%
•Resistance measurement
0 to 500  fourconductor
measurement (in the range
of 600)
" 0.8%
Temperature error with reference to the input range
•In the resistance
measurement range " 0.02% K
•In all the other
measurement ranges " 0.007% K
Linearity error (with reference
to the input range) " 0.05% K
Repeat accuracy (in the steady
state at 25 °C, referred to the
input range)
" 0.1%