 |
SIMATIC S7-400, SM 431 ANALOG INPUT MODULE OPTIC. ISOLATED, 8 AI, 13 BIT RESOLUTION, U/I/RESIST. |
Supply voltage |
Load voltage L+ |
● Rated value (DC) |
not necessary |
Input current |
from backplane bus 5 V DC, max. |
350 mA |
Power loss |
Power loss, typ. |
1.8 W |
Hardware configuration |
Slots |
● required slots |
1 |
Analog inputs |
Number of analog inputs |
8 |
Number of analog inputs for voltage/current measurement |
8 |
Number of analog inputs for resistance measurement |
4 |
permissible input voltage for voltage input (destruction limit), max. |
50 V |
permissible input current for current input (destruction limit), max. |
50 mA; 40 mA continuous |
Input ranges |
● Voltage |
Yes |
● Current |
Yes |
● Thermocouple |
No |
● Resistance thermometer |
No |
● Resistance |
Yes |
Input ranges (rated values), voltages |
● 1 to 5 V |
Yes |
● Input resistance (1 to 5 V) |
200 kΩ |
● -1 V to +1 V |
Yes |
● Input resistance (-1 V to +1 V) |
200 kΩ |
● -10 V to +10 V |
Yes |
● Input resistance (-10 V to +10 V) |
200 kΩ |
Input ranges (rated values), currents |
● -20 to +20 mA |
Yes |
● Input resistance (-20 to +20 mA) |
80 Ω |
● 4 to 20 mA |
Yes |
● Input resistance (4 to 20 mA) |
80 Ω |
Input ranges (rated values), resistors |
● 0 to 600 Ohm |
Yes |
● Input resistance (0 to 600 Ohm) |
usable up to 500 ohms |
Cable length |
● Cable length, shielded, max. |
200 m |
Analog value generation |
Integration and conversion time/resolution per channel |
● Resolution with overrange (bit including sign), max. |
13 bit |
● Integration time, parameterizable |
Yes |
● Basic conversion time, ms |
23 / 25 ms |
● Integration time, ms |
16,7 / 20 ms |
● Interference voltage suppression for interference frequency f1 in Hz |
60 / 50 Hz |
Encoder |
Connection of signal encoders |
● for current measurement as 2-wire transducer |
Yes; with external transmitter supply |
● for current measurement as 4-wire transducer |
Yes |
● for resistance measurement with two-wire connection |
Yes; Line resistances are also measured |
● for resistance measurement with three-wire connection |
Yes; Line resistances are also measured |
● for resistance measurement with four-wire connection |
Yes |
Errors/accuracies |
Operational error limit in overall temperature range |
● Voltage, relative to input area, (+/-) |
1 %; +/-1.0% at +/-1 V; +/-0.6% at +/-10 V; +/-0.7% at 1 to 5 V |
● Current, relative to input area, (+/-) |
1 %; at +/-20 mA, 4 to 20 mA |
● Resistance, relative to input area, (+/-) |
1.25 %; 0 to 500 ohms (4-conductor measurement, in range of 600 ohms) |
Basic error limit (operational limit at 25 °C) |
● Voltage, relative to input area, (+/-) |
0.7 %; 0.7% at +/-1 V; 0.4% at +/-10 V; 0.5% at 1 to 5 V |
● Current, relative to input area, (+/-) |
0.7 %; at +/-20 mA, 4 to 20 mA |
● Resistance, relative to input area, (+/-) |
0.8 %; 0 to 500 ohms (4-conductor measurement, in range of 600 ohms) |
Galvanic isolation |
Galvanic isolation analog inputs |
● Galvanic isolation analog inputs |
Yes; internal/external |
● between the channels |
No |
Permissible potential difference |
between the inputs (UCM) |
30 V AC |
Isolation |
Isolation tested with |
2120 V DC between bus and analog part; 500 V DC between bus and local ground; 2120 V DC between analog part and local ground |
Dimensions |
Width |
25 mm |
Height |
290 mm |
Depth |
210 mm |
Weights |
Weight, approx. |
500 g |
last modified: |
21.08.2014 |