SIMATIC S7-1200, Analog input, SM 1231, 8 AI, +/-10 V, +/-5 V, +/-2.5 V, or 0-20 mA/4-20 mA, 12 bit+sign or (13 bit ADC)
Category: SIEMENS Simatic Control Systems
Specifications
SKU
6ES7231-4HF32-0XB0
Details
| General information | ||
| Product type designation | SM 1231, AI 8x13 bit | |
| Supply voltage | ||
| Rated value (DC) | 24 V | |
| Input current | ||
| Current consumption, typ. | 60 mA | |
| from backplane bus 5 V DC, typ. | 90 mA | |
| Power loss | ||
| Power loss, typ. | 1.5 W | |
| Analog inputs | ||
| Number of analog inputs | 8; Current or voltage differential inputs | |
| permissible input voltage for voltage input (destruction limit), max. | 35 V | |
| permissible input current for current input (destruction limit), max. | 40 mA | |
| Cycle time (all channels) max. | 625 µs | |
| Input ranges | ||
| ● Voltage | Yes; ±10V, ±5V, ±2.5V | |
| ● Current | Yes; 4 to 20 mA, 0 to 20 mA | |
| ● Thermocouple | No | |
| ● Resistance thermometer | No | |
| ● Resistance | No | |
| Input ranges (rated values), voltages | ||
| ● -10 V to +10 V | Yes | |
| — Input resistance (-10 V to +10 V) | ≥9 MOhm | |
| ● -2.5 V to +2.5 V | Yes | |
| — Input resistance (-2.5 V to +2.5 V) | ≥9 MOhm | |
| ● -5 V to +5 V | Yes | |
| — Input resistance (-5 V to +5 V) | ≥9 MOhm | |
| Input ranges (rated values), currents | ||
| ● 0 to 20 mA | Yes | |
| — Input resistance (0 to 20 mA) | 280 Ω | |
| ● 4 mA to 20 mA | Yes | |
| — Input resistance (4 mA to 20 mA) | 280 Ω | |
| Thermocouple (TC) | ||
| Temperature compensation | ||
| — parameterizable | No | |
| Analog value generation for the inputs | ||
| Integration and conversion time/resolution per channel | ||
| ● Resolution with overrange (bit including sign), max. | 12 bit; + sign | |
| ● Integration time, parameterizable | Yes | |
| ● Interference voltage suppression for interference frequency f1 in Hz | 40 dB, DC to 60 V for interference frequency 50 / 60 Hz | |
| Smoothing of measured values | ||
| ● parameterizable | Yes | |
| ● Step: None | Yes | |
| ● Step: low | Yes | |
| ● Step: Medium | Yes | |
| ● Step: High | Yes | |
| Errors/accuracies | ||
| Temperature error (relative to input range), (+/-) | 25 °C ±0.1%, to 55 °C ±0.2% total measurement range | |
| Basic error limit (operational limit at 25 °C) | ||
| ● Voltage, relative to input range, (+/-) | 0.1 % | |
| ● Current, relative to input range, (+/-) | 0.1 % | |
| Interference voltage suppression for f = n x (f1 +/- 1 %), f1 = interference frequency | ||
| ● Common mode voltage, max. | 12 V | |
| Interrupts/diagnostics/status information | ||
| Alarms | Yes | |
| Diagnostics function | Yes | |
| Alarms | ||
| ● Diagnostic alarm | Yes | |
| Diagnoses | ||
| ● Monitoring the supply voltage | Yes | |
| ● Wire-break | Yes | |
| Diagnostics indication LED | ||
| ● for status of the inputs | Yes | |
| ● for maintenance | Yes | |
| Degree and class of protection | ||
| IP degree of protection | IP20 | |
| Standards, approvals, certificates | ||
| CE mark | Yes | |
| CSA approval | Yes | |
| UL approval | Yes | |
| cULus | Yes | |
| FM approval | Yes | |
| RCM (formerly C-TICK) | Yes | |
| KC approval | Yes | |
| Marine approval | Yes | |
| Ecological footprint | ||
| ● environmental product declaration | Yes | |
| Global warming potential | ||
| — global warming potential, (total) [CO2 eq] | 43.1 kg | |
| — global warming potential, (during production) [CO2 eq] | 7.62 kg | |
| — global warming potential, (during operation) [CO2 eq] | 36 kg | |
| — global warming potential, (after end of life cycle) [CO2 eq] | -0.544 kg | |
| Ambient conditions | ||
| Free fall | ||
| ● Fall height, max. | 0.3 m; five times, in product package | |
| Ambient temperature during operation | ||
| ● min. | -20 °C | |
| ● max. | 60 °C | |
| ● horizontal installation, min. | -20 °C | |
| ● horizontal installation, max. | 60 °C | |
| ● vertical installation, min. | -20 °C | |
| ● vertical installation, max. | 50 °C | |
| Ambient temperature during storage/transportation | ||
| ● min. | -40 °C | |
| ● max. | 70 °C | |
| Air pressure acc. to IEC 60068-2-13 | ||
| ● Operation, min. | 795 hPa | |
| ● Operation, max. | 1 080 hPa | |
| ● Storage/transport, min. | 660 hPa | |
| ● Storage/transport, max. | 1 080 hPa | |
| Relative humidity | ||
| ● Operation at 25 ℃ without condensation, max. | 95 % | |
| Pollutant concentrations | ||
| ● SO2 at RH < 60% without condensation | S02: < 0.5 ppm; H2S: < 0.1 ppm; RH < 60 % condensation-free | |
| connection method | ||
| required front connector | Yes | |
| Mechanics/material | ||
| Enclosure material (front) | ||
| ● Plastic | Yes | |
| Dimensions | ||
| Width | 45 mm | |
| Height | 100 mm | |
| Depth | 75 mm | |
| Weights | ||
| Weight, approx. | 180 g | |
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