SIMATIC S7-400 SM 431, AI RTD 8x16 bit

Analog inputs: Number of analogue inputs: 8. For voltage/current measurement: 8. permissible input voltage for voltage input (destruction limit), max.: 35 V; 35 V continuous, 75 V for max. 1 s (mark to space ratio 1:20). Constant measurement current for resistance-type transmitter, typ.: 1 mA. Input ranges: Voltage: No. Current: No. Thermocouple: No. Resistance thermometer: Yes. Resistance: Yes. Cable length: shielded, max.: 200 m; 50 m with thermocouples and input ranges ±80 mV. Analog value generation for the inputs: Integration and conversion time/resolution per channel: Resolution with overrange (bit including sign), max.: 16 bit. Integration time, parameterizable: Yes. Basic conversion time (ms): 8 / 23 / 25 ms. Integration time (ms): 20 ms at 50 Hz (entire module incl. wire break). Interference voltage suppression for interference frequency f1 in Hz: none/ 60 / 50 Hz. Basic execution time of the module (all channels released): 8 ms; 8 / 23 / 25 ms. Encoder: Connection of signal encoders: for resistance measurement with three-wire connection: Yes. for resistance measurement with four-wire connection: Yes. Interrupts/diagnostics/status information: Diagnostics function: Yes; Parameterizable. Potential separation: Potential separation analogue inputs: Potential separation analogue inputs: Yes; internal/external. between the channels: Yes. between the channels and backplane bus: Yes. Isolation: Isolation tested with: 500 V DC. Dimensions: Width: 25 mm. Height: 290 mm. Depth: 210 mm. Weights: Weight, approx.: 650 g.