SIMATIC S7-400 SM 431, AI U/I/R 8x13 bit

Analog inputs: Number of analog inputs: 8. For voltage/current measurement: 8. 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. Constant measurement current for resistance-type transmitter, typ.: 1.67 mA. Input ranges: Voltage: Yes. Current: Yes. Thermocouple: No. Resistance thermometer: No. Resistance: Yes. Input ranges (rated values), voltages: 1 V to 5 V: Yes. Input resistance (1 V 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 mA to +20 mA: Yes. Input resistance (-20 mA to +20 mA): 80 Ω. 4 mA to 20 mA: Yes. Input resistance (4 mA to 20 mA): 80 Ω. Cable length: shielded, max.: 200 m. Analog value generation for the inputs: 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: 50 / 60 Hz. Basic execution time of the module (all channels released): 200 ms; 184 / 200 ms. Encoder: Connection of signal encoders: for voltage measurement: Yes; possible. 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: Temperature error (relative to input range), (+/-): 0.02 %/K; ±0.02 %/K in impedance measuring range; ±0.007 % in all other measuring ranges. Operational error limit in overall temperature range: Voltage, relative to input range, (+/-): 1 %; ±1.0 % at ±1 V; ±0.6 % at ±10 V; ±0.7 % at 1 to 5 V. Current, relative to input range, (+/-): 1 %; at ±20 mA, 4 to 20 mA. Resistance, relative to input range, (+/-): 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 range, (+/-): 0.7 %; 0.7% at ±1 V; 0.4% at ±10 V; 0.5% at 1 to 5 V. Current, relative to input range, (+/-): 0.7 %; at ±20 mA, 4 to 20 mA. Resistance, relative to input range, (+/-): 0.8 %; 0 to 500 ohms (4-conductor measurement, in range of 600 ohms). Interrupts/diagnostics/status information: Diagnostics function: No. Potential separation: Potential separation analogue inputs: Potential separation analogue inputs: Yes; internal/external. between the channels: No. between the channels and backplane bus: Yes. Isolation: Isolation tested with: 2 120 V DC between bus and analogue part; 500 V DC between bus and local ground; 2 120 V DC between analogue part and local ground. Dimensions: Width: 25 mm. Height: 290 mm. Depth: 210 mm. Weights: Weight, approx.: 500 g.