General information
Product type designationSM 1231, AI 4x16 bit RTD
based on6ES7231-5PD32-0XB0
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 inputs4; Resistance thermometer
permissible input voltage for voltage input (destruction limit), max.±35 V
Technical unit for temperature measurement adjustableDegrees Celsius/degrees Fahrenheit
Input ranges
VoltageNo
CurrentNo
ThermocoupleNo
Resistance thermometerYes; Resistance-type transmitter: Pt10, Pt50, Pt100, Pt200, Pt500, Pt1000, Ni100, Ni120, Ni200, Ni500, Ni1000, Cu10, Cu50, Cu100, LG-Ni1000
ResistanceYes; 150 Ω, 300 Ω, 600 Ω
Input ranges (rated values), resistance thermometer
Cu 10Yes
— Input resistance (Cu 10)10 Ω
Ni 100Yes
— Input resistance (Ni 100)100 Ω
Ni 1000Yes
— Input resistance (Ni 1000)1 000 Ω
LG-Ni 1000Yes
— Input resistance (LG-Ni 1000)1 000 Ω
Ni 120Yes
— Input resistance (Ni 120)120 Ω
Ni 200Yes
— Input resistance (Ni 200)200 Ω
Ni 500Yes
— Input resistance (Ni 500)500 Ω
Pt 100Yes
— Input resistance (Pt 100)100 Ω
Pt 1000Yes
— Input resistance (Pt 1000)1 000 Ω
Pt 200Yes
— Input resistance (Pt 200)200 Ω
Pt 500Yes
— Input resistance (Pt 500)500 Ω
Input ranges (rated values), resistors
0 to 150 ohmsYes
0 to 300 ohmsYes
0 to 600 ohmsYes
Temperature compensation
— ParameterizableNo
Analog value generation for the inputs
Measurement principleintegrating
Integration and conversion time/resolution per channel
Resolution with overrange (bit including sign), max.15 bit; + sign
Integration time, parameterizableNo
Interference voltage suppression for interference frequency f1 in Hz85 dB at 50 / 60 / 400 Hz
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), (+/-)0.05 %
Interference voltage suppression for f = n x (f1 +/- 1 %), f1 = interference frequency
Common mode interference, min.120 dB
Interrupts/diagnostics/status information
AlarmsYes
Diagnostics functionYes; Can be read out
Alarms
Diagnostic alarmYes
Diagnoses
Monitoring the supply voltageYes
Wire breakYes
Diagnostics indication LED
for status of the inputsYes
for maintenanceYes
Isolation
Isolation tested with750 V DC (type test) and according to EN 50155 (routine test)
Degree and class of protection
IP degree of protectionIP20
Ecological footprint
environmental product declarationYes
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
Railway application
EN 50121-3-2Yes; EMC for rail vehicles
EN 50121-4Yes; EMC for signal and telecommunications systems
EN 50124-1Yes; Railway applications - overvoltage category OV2; pollution degree PD2; rated surge voltage UNi = 0.5 kV; UNm = 24 V DC
EN 50125-1Yes; Rail vehicles - see ambient conditions
EN 50125-2Yes; Stationary electrical equipment - see ambient conditions
EN 50125-3Yes; Signal and telecommunications systems - see ambient conditions; vibrations and shocks: Application point outside of tracks (1 m to 3 m away from track)
EN 50155Yes; Rail vehicles - temperature class OT1, ST1/ST2, horizontal mounting position
EN 61373Yes; Rail vehicles - vibrations and shocks: Category 1 Class A/B
Fire protection acc. to EN 45545-2Yes; For proof of conformity, see Service & Support
Free fall
Fall height, max.0.3 m; five times, in product package
Ambient temperature during operation
horizontal installation, min.-25 °C; = Tmin (incl. condensation/frost)
horizontal installation, max.60 °C; = Tmax; +70 °C for 10 min (OT1, ST1/ST2 acc. to EN 50155)
vertical installation, min.-25 °C; = Tmin
vertical installation, max.50 °C; = Tmax
Ambient temperature during storage/transportation
min.-40 °C
max.70 °C
Altitude during operation relating to sea level
Installation altitude above sea level, max.2 000 m
Ambient air temperature-barometric pressure-altitudeTmin ... Tmax at 1 140 hPa ... 795 hPa (-1 000 m ... +2 000 m)
Relative humidity
With condensation, tested in accordance with IEC 60068-2-38, max.100 %; RH incl. condensation / frost (no commissioning in bedewed state), horizontal installation
Coolants and lubricants
— Resistant to commercially available coolants and lubricantsYes; Incl. diesel and oil droplets in the air
Use in stationary industrial systems
— to biologically active substances according to EN 60721-3-3Yes; Class 3B2 mold, fungus and dry rot spores (with the exception of fauna); Class 3B3 on request
— to chemically active substances according to EN 60721-3-3Yes; Class 3C4 (RH < 75 %) incl. salt spray acc. to EN 60068-2-52 (severity degree 3); *
— to mechanically active substances according to EN 60721-3-3Yes; Class 3S4 incl. sand, dust, *
Use on land craft, rail vehicles and special-purpose vehicles
— to biologically active substances according to EN 60721-3-5Yes; Class 5B2 mold, fungus and dry rot spores (with the exception of fauna); Class 5B3 on request
— to chemically active substances according to EN 60721-3-5Yes; Class 5C3 (RH < 75 %) incl. salt spray acc. to EN 60068-2-52 (severity degree 3); *
— to mechanically active substances according to EN 60721-3-5Yes; Class 5S3 incl. sand, dust; *
Usage in industrial process technology
— Against chemically active substances acc. to EN 60654-4Yes; Class 3 (excluding trichlorethylene)
— Environmental conditions for process, measuring and control systems acc. to ANSI/ISA-71.04Yes; Level GX group A/B (excluding trichlorethylene; harmful gas concentrations up to the limits of EN 60721-3-3 class 3C4 permissible); level LC3 (salt spray) and level LB3 (oil)
Remark
— Note regarding classification of environmental conditions acc. to EN 60721, EN 60654-4 and ANSI/ISA-71.04* The supplied plug covers must remain in place over the unused interfaces during operation!
Conformal coating
Coatings for printed circuit board assemblies acc. to EN 61086Yes; Class 2 for high reliability
Protection against fouling acc. to EN 60664-3Yes; Type 1 protection
Electronic equipment on rolling stock acc. to EN 50155Yes; Class PC2 protective coating acc. to EN 50155:2017
Military testing according to MIL-I-46058C, Amendment 7Yes; Discoloration of coating possible during service life
Qualification and Performance of Electrical Insulating Compound for Printed Board Assemblies according to IPC-CC-830AYes; Conformal coating, Class A
Connection method
required front connectorYes
Mechanics/material
plasticYes
Dimensions
Width45 mm
Height100 mm
Depth75 mm
Weights
Weight, approx.220 g
Other
Note:for use in railway applications, also observe the product information "SIPLUS extreme RAIL" A5E37661960A, Online Support article 109736776