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| 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 | |
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