Siemens Simatic S7-400 - Manual (Page 318)

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
16
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+
No
No
No
Permitted potential difference
•
Between inputs and M
ANA
(U
CM
)
•
Between the inputs (E
CM
)
2 VDC/2 VAC
SS
2 VDC/2 VAC
SS
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
ms 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
(U
CM
< 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%
" 0.65%
" 1 %
•
Current input
– " 20 mA
– 4 mA to 20 mA
" 0.65%
" 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%
" 0.25%
" 0.5%
•
Current input
– " 20 mA
– 4 mA to 20 mA
" 0.25%
" 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