Siemens Simatic M7-400 Reference Manual page 308

Analog Modules
Technical Specifications of the SM 431; AI 8
Programming package
Associated programming
package
Dimensions and Weight
Dimensions W H D
(in millimeters)
Weight
Data for Specific Module
Number of inputs
•
For resistance-type sensor
Length of cable
•
Shielded
Voltages, Currents, Potentials
Rated load voltage L+
•
Reverse polarity protection
Power supply of the
transmitters
•
Supply current
•
Short-circuit proof
Constant measured current for
resistance-type sensor
Isolation
•
Between channels and
backplane bus
•
Between the channels
•
Between channels and
load voltage L+
Permitted potential difference
•
Between inputs and M
ANA
(U )
CM
•
Between the inputs (E )
CM
•
Between M and
ANA
M (U )
internal ISO
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
5-92
Current consumption
•
As of STEP 7 V 2.0
•
25 290 210
Power dissipation of the
Approx. 500 g
module
8
Measuring principle
4
Integration time/conversion
time/resolution (per channel)
Max. 200 m
•
24 VDC (required only
•
for the supply of 2-wire
transmitters)
•
Yes
•
Max. 50 mA
Smoothing of the measured
Yes
values
Typ. 1.67 mA
Time constant of the input
filter
Basic execution time of the
module, in ms (all channels
Yes
enabled)
No
Yes
8 VAC
8 VAC
75 VDC/60 VAC
2120 VDC
500 VDC
707 VDC
2120 VDC
2120 VDC
S7-400, M7-400 Programmable Controllers Module Specifications
14 Bit
From the backplane bus Max. 1000 mA
From the backplane bus L+ Max. 200 mA (with 8
connected, fully
controlled 2-wire
transmitters)
Typ. 4.9 W
Analog Value Generation
Actual-value
conversion
(Does not go into the
response time)
Parameters can be Yes
assigned
Interference voltage None/400/60/50
suppression f1 in Hz
52 ms
Basic conversion time in
ms
Resolution (incl. 14/14/14
overrange)
Can be parameterized
"none – a lot"
15 ms
0.420
A5E00069467-07