| SIMATIC S7-400, analog input SM 431,8 analog input; Resolution 16-bit, resistance/PT100/NI100 potential isolation, diagnostic alarm, 20 ms conversion time |
input current |
DC 5V from backplane bus, maximum | 650 mA |
power loss |
power loss, typical | 3.3W |
analog input |
number of analog inputs | 8 |
● When measuring resistance | 8 |
voltage input allowed input voltage (damage limit), maximum | 35V; 35V continuous voltage, 75V within 1 s maximum (duty cycle 1:20) |
input range |
● voltage | no |
● Current | no |
● thermocouple | no |
● Resistance thermometer | yes |
● Resistance | yes |
input range (rated value), resistance thermometer |
● Ni 100 | yes |
● input resistance (Ni 100) | > 10000 Ohm |
● Ni 1000 | yes; Different features can be selected: Europe/United States |
● input resistance (Ni 1000) | > 10000 Ohm |
● Pt 100 | yes |
● input resistance (Pt 100) | > 10000 Ohm |
● Pt 1000 | yes |
● input resistance (Pt 1000) | > 10000 Ohm |
● Pt 200 | yes |
● input resistance (Pt 200) | > 10000 Ohm |
● Pt 500 | yes |
● input resistance (Pt 500) | > 10000 Ohm |
characteristic linearisation |
● parameterizable | yes |
-For resistance thermometer | Pt100, Pt200, Pt500, Pt1000, Ni100, Ni1000; Different features can be selected (Europe/United States) |
wire Length |
● shielding, maximum | 200 m; 50 m for thermocouple and input range ± 80 mV |
analog value composition at input |
integration and conversion time/resolution per channel |
● resolution with overmodulation (digits including symbols), maximum | 16 bit |
● parameterized integration time | yes |
● Basic conversion time (ms) | 8 / 23 / 25 ms |
● integral time (ms) | 20 ms at 50Hz (all modules include disconnection) |
● Basic conversion time, including integration time (ms) | |
-Additional switching time for disconnection monitoring | 110 ms / 4 ms |
-Additional switching time for disconnection monitoring and resistance measurement | none |
● suppression of interference voltage at interference frequency f1 (unit Hz) | none/60 / 50Hz |
sensor |
signal sensor connection |
● Resistance measurement using three-wire interface | yes |
● Resistance measurement using four-wire interface | yes |
error/precision |
operating error limits over the entire temperature range |
● Resistance Temperature, related to the input range,(+/-) | ± 1°C |
basic error limit (Operation error limit at 25°C) |
● Resistance Temperature, related to the input range,(+/-) | ± 0,2°C |
alarm/diagnosis/status information |
alarm |
● diagnostic alarm | yes; Parameterizable |
● limit value alarm | yes |
potential isolation |
analog Input potential isolation |
● analog input potential isolation | yes; Internal/external |
● between channels | no |
insulation |
insulation Test, use | DC 1500V |
size |
width | 25 mm |
height | 290 mm |
depth | 210 mm |
weight |
weight, about | 650g |