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6ES7231-5QD32-0XB0
SIMATIC
S7-1200, Analog input, SM 1231 TC, 4 AI thermocouples
General information
Product type designation SM 1231, AI 4×16 bit TC
Supply voltage
Rated value (DC) 24 V
Input current
Current consumption, typ. 40 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; Thermocouples
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, 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 B Yes
● Type C Yes
● Type E Yes
● Type J Yes
● Type K Yes
● Type N Yes
● Type R Yes
● Type S Yes
● Type T Yes
● Type TXK/TXK(L) to GOST Yes
Thermocouple (TC)
Temperature compensation
— parameterizable No
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 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
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
last modified: 06/04/2020
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