Siemens Simatic S7-400 - Manual (Page 349)

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