| General information | 
| Product type designation | SB 1231, AI 1x12 bit | 
| Supply voltage | 
| Rated value (DC) |  | 
| ● 24 V DC | Yes | 
| Input current | 
| from backplane bus 5 V DC, typ. | 55 mA | 
| Power loss | 
| Power loss, typ. | 0.4 W | 
| Analog inputs | 
| Number of analog inputs | 1; Current or voltage differential inputs | 
| permissible input voltage for current input (destruction limit), max. | ±35 V | 
| permissible input voltage for voltage input (destruction limit), max. | 35 V | 
| permissible input current for voltage input (destruction limit), max. | 40 mA | 
| permissible input current for current input (destruction limit), max. | 40 mA | 
| Cycle time (all channels) max. | 156.25 µs; 400 Hz suppression | 
| Input ranges | 
| ● Voltage | Yes; ±10V, ±5V, ±2.5V | 
| ● Current | Yes; 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) | ≥ 250 Ohm | 
| 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. | 11 bit; + sign | 
| ● Integration time, parameterizable | Yes | 
| ● Interference voltage suppression for interference frequency f1 in Hz | 40 dB, DC to 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 ±0.3%, to 55 °C ±0.6% total measurement range | 
| Interrupts/diagnostics/status information | 
| Alarms | Yes | 
| Diagnostics function | Yes | 
| Alarms | 
| ● Diagnostic alarm | Yes | 
| Diagnostic messages | 
| ● Wire-break | No | 
| Diagnostics indication LED | 
| ● for status of the inputs | Yes | 
| ● for maintenance | Yes | 
| Degree and class of protection | 
| Degree of protection acc. to EN 60529 |  | 
| ● IP20 | Yes | 
| Standards, approvals, certificates | 
| CE mark | Yes | 
| CSA approval | Yes | 
| FM approval | Yes | 
| RCM (formerly C-TICK) | 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 | 
| 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 | 
| last modified: | 11/10/2018 |