| SIMATIC S7-1200, Analog input, SM 1231, 4 AI, +/-10 V, +/-5 V, +/-2.5 V, or 0-20 mA/4-20 mA, 12 bit+sign (13 bit ADC) |
General information |
Product type designation | SM 1231, AI 4×13 bit |
Supply voltage |
Rated value (DC) | 24 V |
Input current |
Current consumption, typ. | 45 mA |
from backplane bus 5 V DC, typ. | 80 mA |
Power loss |
Power loss, typ. | 1.5 W |
Analog inputs |
Number of analog inputs | 4; 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 |
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 |
Diagnostic messages |
● 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 |
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 |
|
Đánh giá
Chưa có đánh giá nào.