| | SIMATIC S7-1200, ANALOG INPUT, SM 1231RTD, 8 X AI RTD MODULE, |
| |
| Supply voltage |
| 24 V DC | Yes |
| Input current |
| Current consumption, typ. | 90 mA |
| from backplane bus 5 V DC, typ. | 80 mA |
| Power losses |
| Power loss, typ. | 1.5 W |
| Analog inputs |
| Number of analog inputs | 8; Resistance thermometer |
| permissible input frequency for current input (destruction limit), max. | ± 35 V |
| Technical unit for temperature measurement adjustable | Degrees Celsius/degrees Fahrenheit |
| Input ranges |
| Resistance thermometer | Yes; Resistance-type transmitter: Pt10, Pt50, Pt100, Pt200, Pt500, Pt1000, Ni100, Ni120, Ni200, Ni500, Ni1000, Cu10, Cu50, Cu100, LG-Ni1000 |
| Resistance | Yes; 150 Ω, 300 Ω, 600 Ω |
| Input ranges (rated values), resistance thermometers |
| Cu 10 | Yes |
| Input resistance (Cu 10) | 10 Ω |
| Ni 100 | Yes |
| Input resistance (Ni 100) | 100 Ω |
| Ni 1000 | Yes |
| Input resistance (Ni 1000) | 1000 Ω |
| LG-Ni 1000 | Yes |
| Input resistance (LG-Ni 1000) | 1000 Ω |
| Ni 120 | Yes |
| Input resistance (Ni 120) | 120 Ω |
| Ni 200 | Yes |
| Input resistance (Ni 200) | 200 Ω |
| Ni 500 | Yes |
| Input resistance (Ni 500) | 500 Ω |
| Pt 100 | Yes |
| Input resistance (Pt 100) | 100 Ω |
| Pt 1000 | Yes |
| Input resistance (Pt 1000) | 1000 Ω |
| Pt 200 | Yes |
| Input resistance (Pt 200) | 200 Ω |
| Pt 500 | Yes |
| Input resistance (Pt 500) | 500 Ω |
| Input ranges (rated values), resistors |
| 0 to 150 ohms | Yes |
| 0 to 300 ohms | Yes |
| 0 to 600 ohms | Yes |
| Thermocouple (TC) |
| Temperature compensation |
| Parameterizable | No |
| Analog value creation |
| Measurement principle | integrating |
| Integrations and conversion time/ resolution per channel |
| Resolution with overrange (bit including sign), max. | 15 bit; + sign |
| Integration time, parameterizable | No |
| Interference voltage suppression for interference frequency f1 in Hz | 85 dB at 10 / 50 / 60 / 400 Hz |
| Errors/accuracies |
| cold connection point | +/-1.5 °C |
| Temperature error (relative to input area) | 25 °C ±0.1 % to 55 °C ±0.2 % total measurement range |
| Interference voltage suppression for f = n x (fl +/- 1%), fl = interference frequency |
| Common mode interference, min. | 120 dB |
| Interrupts/diagnostics/status information |
| Alarms |
| Alarms | Yes |
| Diagnostic alarm | Yes |
| Diagnostic messages |
| Diagnostic functions | Yes; Can be read out |
| Monitoring the supply voltage | Yes |
| Wire break | Yes |
| Diagnostics indication LED |
| for status of the inputs | Yes |
| for maintenance | Yes |
| Climatic and mechanical conditions for storage and transport |
| Climatic conditions for storage and transport |
| Free fall |
| Drop height, max. (in packaging) | 0.3 m; five times, in dispatch package |
| Temperature |
| Permissible temperature range | -40 °C to +70 °C |
| Air pressure acc. to IEC 60068-2-13 |
| Permissible air pressure | 1080 to 660 hPa |
| Mechanical and climatic conditions during operation |
| Climatic conditions in operation |
| Temperature |
| Permissible temperature range | 0 °C to 55 °C horizontal installation 0 °C to 45 °C vertical installation |
| Air pressure acc. to IEC 60068-2-13 |
| Permissible air pressure | 1080 to 795 hPa |
| Pollutant concentrations |
| SO2 at RH < 60% without condensation | S02: < 0.5 ppm; H2S: < 0.1 ppm; RH < 60% condensation-free |
| Degree and class of protection |
| IP20 | Yes |
| Standards, approvals, certificates |
| CE mark | Yes |
| C-TICK | Yes |
| FM approval | Yes |
| Connection method |
| required front connector | Yes |
| Mechanics/material |
| Type of housing (front) | |
| Plastic | Yes |
| Dimensions |
| Width | 70 mm |
| Height | 100 mm |
| Depth | 75 mm |
| Weight |
| Weight, approx. | 220 g |
| Status | Mar 12, 2012 |
