Siemens
01 2018
(4872) 700-366
skenergo@mail.ru

Article number

6ES7231-4HD32-0XB0

6ES7231-4HF32-0XB0

6ES7231-5ND32-0XB0

ANALOG INPUT SM 1231, 4AI

ANALOG INPUT SM 1231, 8AI

ANALOG INPUT SM 1231, 4AI 16BIT

Supply voltage

Rated value (DC)

  • 24 V DC

Yes

Yes

Yes

Input current

Current consumption, typ.

45mA

45mA

65mA

from backplane bus 5 V DC, typ.

80mA

90mA

80mA

Power loss

Power loss, typ.

1.5W

1.5W

1.8W

Analog inputs

Number of analog inputs

4; Current or voltage differential inputs

8; Current or voltage differential inputs

4; Current or voltage differential inputs

permissible input voltage for current input (destruction limit), max.

35 V

35 V

15 V

permissible input voltage for voltage input (destruction limit), max.

35V

35V

35 V

permissible input current for voltage input (destruction limit), max.

40mA

40mA

40mA; limited by input resistance 1 MOhm

permissible input current for current input (destruction limit), max.

40mA

40mA

40mA

Cycle time (all channels) max.

625s

625s

100s

Input ranges

  • Voltage

Yes; 10V, 5V, 2.5V

Yes; 10V, 5V, 2.5V

Yes; 10V, 5V, 2.5V or 1.25V

  • Current

Yes; 4 to 20 mA, 0 to 20 mA

Yes; 4 to 20 mA, 0 to 20 mA

Yes; 4 to 20 mA, 0 to 20 mA

  • Thermocouple

No

No

No

  • Resistance thermometer

No

No

No

  • Resistance

No

Yes

No

Input ranges (rated values), voltages

  • -1.25 V to +1.25 V

Yes

  • -10 V to +10 V

Yes

Yes

Yes

  • Input resistance (-10 V to +10 V)

≥9 MOhm

≥9 MOhm

≥1 MOhm

  • -2.5 V to +2.5 V

Yes

Yes

Yes

  • Input resistance (-2.5 V to +2.5 V)

≥9 MOhm

≥9 MOhm

≥1 MOhm

  • -5 V to +5 V

Yes

Yes

Yes

  • Input resistance (-5 V to +5 V)

≥9 MOhm

≥9 MOhm

≥1 MOhm

Input ranges (rated values), currents

  • 0 to 20 mA

Yes

Yes

Yes

  • Input resistance (0 to 20 mA)

280Ω

280Ω

  • 4 mA to 20 mA

Yes

Yes

Yes

  • Input resistance (4 mA to 20 mA)

280Ω

280Ω

Thermocouple (TC)

Temperature compensation

  • parameterizable

No

Analog value generation for the inputs

Integration and conversion time/resolution per channel

  • Resolution with overrange (bit including sign), max.

12bit; + sign

12bit; + sign

15bit; + sign

  • Integration time, parameterizable

Yes

Yes

Yes

  • Interference voltage suppression for interference frequency f1 in Hz

40 dB, DC to 60 V for interference frequency 50 / 60 Hz

40 dB, DC to 60 V for interference frequency 50 / 60 Hz

40 dB, DC to 60 V for interference frequency 50 / 60 Hz

Smoothing of measured values

  • parameterizable

Yes

Yes

Yes

  • Step: None

Yes

Yes

Yes

  • Step: low

Yes

Yes

Yes

  • Step: Medium

Yes

Yes

Yes

  • Step: High

Yes

Yes

Yes

Errors/accuracies

Temperature error (relative to input range), (+/-)

25 C 0.1%, to 55 C 0.2% total measurement range

25 C 0.1%, to 55 C 0.2% total measurement range

25 C 0.1% / 0.3% total measurement range

Basic error limit (operational limit at 25 C)

  • Voltage, relative to input range, (+/-)

0.1%

0.1%

0.1%

  • Current, relative to input range, (+/-)

0.1%

0.1%

0.1%

Interference voltage suppression for f = n x (f1 +/- 1 %), f1 = interference frequency

  • Common mode voltage, max.

12V

12V

12V

Interrupts/diagnostics/status information

Alarms

Yes

Yes

Yes

Diagnostic functions

Yes

Yes

Yes

Alarms

  • Diagnostic alarm

Yes

Yes

Yes

Diagnostic messages

  • Monitoring the supply voltage

Yes

Yes

Yes

  • Wire-break

Yes

Yes

Yes

Diagnostics indication LED

  • for status of the inputs

Yes

Yes

Yes

  • for maintenance

Yes

Yes

Yes

Degree and class of protection

Degree of protection acc. to EN 60529

  • IP20

Yes

Yes

Yes

Standards, approvals, certificates

CE mark

Yes

Yes

Yes

CSA approval

Yes

Yes

Yes

FM approval

Yes

Yes

Yes

RCM (formerly C-TICK)

Yes

Yes

Yes

Marine approval

Yes

Yes

Yes

Ambient conditions

Free fall

  • Fall height, max.

0.3m; five times, in product package

0.3m; five times, in product package

0.3m; five times, in product package

Ambient temperature during operation

  • min.

-20C

-20C

-20C

  • max.

60C

60C

60C

  • horizontal installation, min.

-20C

-20C

-20C

  • horizontal installation, max.

60C

60C

60C

  • vertical installation, min.

-20C

-20C

-20C

  • vertical installation, max.

50C

50C

50C

Ambient temperature during storage/transportation

  • min.

-40C

-40C

-40C

  • max.

70C

70C

70C

Air pressure acc. to IEC 60068-2-13

  • Operation, min.

795hPa

795hPa

795hPa

  • Operation, max.

1080hPa

1080hPa

1080hPa

  • Storage/transport, min.

660hPa

660hPa

660hPa

  • Storage/transport, max.

1080hPa

1080hPa

1080hPa

Relative humidity

  • Operation at 25 ℃ without condensation, max.

95%

95%

95%

Pollutant concentrations

  • SO2 at RH < 60% without condensation

S02: < 0.5 ppm; H2S: < 0.1 ppm; RH < 60% condensation-free

S02: < 0.5 ppm; H2S: < 0.1 ppm; RH < 60% condensation-free

S02: < 0.5 ppm; H2S: < 0.1 ppm; RH < 60% condensation-free

Connection method

required front connector

Yes

Yes

Yes

Mechanics/material

Enclosure material (front)

  • Plastic

Yes

Yes

Yes

Dimensions

Width

45mm

45mm

45mm

Height

100mm

100mm

100mm

Depth

75mm

75mm

75mm

Weights

Weight, approx.

180g

180g

180g


















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