Analog Modules
5-92 S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
Technical Specifications of the SM 431; AI 8 14 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+ 24 VDC (required only
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+
Yes
No
Yes
Permitted potential difference
Between inputs and MANA
(UCM)8 VAC
Between the inputs (ECM)8 VAC
Between MANA and
Minternal (UISO)75 VDC/60 VAC
Insulation tested
Between bus and analog
section
Between bus and chassis
ground
Between analog section
and L+/M
Between analog section
and chassis ground
Between L+/M and chassis
ground
2120 VDC
500 VDC
707 VDC
2120 VDC
2120 VDC
Current consumption
From the backplane bus Max. 1000 mA
From the backplane bus L+ Max. 200 mA (with 8
connected, fully
controlled 2-wire
transmitters)
Power dissipation of the
module Typ. 4.9 W
Analog Value Generation
Measuring principle Actual-value
conversion
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 None/400/60/50
Basic conversion time in
ms 52 s
Resolution (incl.
overrange) 14/14/14
Smoothing of the measured
values Can be parameterized
“none – a lot”
Time constant of the input
filter 15 s
Basic execution time of the
module, in ms (all channels
enabled)
0.420