| Article number | 6ES7231-5QA30-0XB0 | 
|  | Signal Board SB 1231 TC, 1 AI | 
| General information |  | 
| Product type designation | SB 1231, AI 1×16 bit TC | 
| Supply voltage |  | 
| Rated value (DC) | 24 V | 
| Input current |  | 
| Current consumption, typ. | 5 mA | 
| from backplane bus 5 V DC, typ. | 20 mA | 
| Power loss |  | 
| Power loss, typ. | 0.5 W | 
| Analog inputs |  | 
| Number of analog inputs | 1; Thermocouples | 
| permissible input voltage for current input (destruction limit), max. | ±35 V | 
| permissible input voltage for voltage input (destruction limit), max. | ±35 V | 
| Technical unit for temperature measurement adjustable | Degrees Celsius/degrees Fahrenheit | 
| Input ranges |  | 
| ● Voltage | Yes | 
| ● Current | No | 
| ● Thermocouple | Yes; J, K, T, E, R & S, B, N, C, TXK/XK(L); voltage range: ±80 mV | 
| ● Resistance thermometer | No | 
| ● Resistance | No | 
| Input ranges (rated values), voltages |  | 
| ● -80 mV to +80 mV | Yes | 
| — Input resistance (-80 mV to +80 mV) | ≥1 MOhm | 
| Input ranges (rated values), thermocouples |  | 
| ● Type J | Yes | 
| — Input resistance (type J) | 1 200 °C | 
| ● Type K | Yes | 
| — Input resistance (Type K) | 1 372 °C | 
| Thermocouple (TC) |  | 
| Temperature compensation |  | 
| — parameterizable | No | 
| Analog outputs |  | 
| Number of analog outputs | 0 | 
| Cable length |  | 
| ● shielded, max. | 100 m; shielded, twisted pair | 
| Analog value generation for the inputs |  | 
| Measurement principle | integrating | 
| Integration 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 | 
| Smoothing of measured values |  | 
| ● parameterizable | Yes | 
| Errors/accuracies |  | 
| Temperature error (relative to input range), (+/-) | 25 °C ±0.1%, to 55 °C ±0.2% total measurement range | 
| Repeat accuracy in steady state at 25 °C (relative to output range), (+/-) | 0.5 % | 
| Interference voltage suppression for f = n x (f1 +/- 1 %), f1 = interference frequency |  | 
| ● Common mode interference, min. | 120 dB | 
| Interrupts/diagnostics/status information |  | 
| Alarms | Yes | 
| Diagnostics function | Yes; Can be read out | 
| Alarms |  | 
| ● Diagnostic alarm | Yes | 
| Diagnoses |  | 
| ● Wire-break | Yes | 
| Diagnostics indication LED |  | 
| ● for status of the inputs | Yes | 
| ● for maintenance | Yes | 
| 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 | 
| 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 / header |  | 
| required front connector | Yes | 
| Mechanics/material |  | 
| Enclosure material (front) |  | 
| ● Plastic | Yes | 
| Dimensions |  | 
| Width | 38 mm | 
| Height | 62 mm | 
| Depth | 21 mm | 
| Weights |  | 
| Weight, approx. | 35 g |