General information

Product type designation

SM 1231 TC 4x16 bit

SM 1231 TC 8x16bit

Supply voltage

Rated value (DC)

• ● 24 V DC

Yes

Yes

Input current

Current consumption, typ.

40 mA

40 mA

from backplane bus 5 V DC, typ.

80 mA

80 mA

Power loss

Power loss, typ.

1.5 W

1.5 W

Analog inputs

Number of analog inputs

4; Thermocouples

8; Thermocouples

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

± 35 V

± 35 V

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

+-35 V

+-35 V

Technical unit for temperature measurement adjustable

Degrees Celsius/degrees Fahrenheit

Degrees Celsius/degrees Fahrenheit

Input ranges

• ● Voltage

Yes

Yes

• ● Current

No

No

• ● Thermocouple

Yes; J, K, T, E, R, S, N, C, TXK/XK(L); voltage range: +/-80 mV

Yes; J, K, T, E, R & S, B, N, C, TXK/XK(L); voltage range: ±80 mV

• ● Resistance thermometer

No

No

• ● Resistance

No

No

Input ranges (rated values), voltages

• ● -80 mV to +80 mV

Yes

Yes

Input ranges (rated values), thermocouples

• ● Type B

Yes

Yes

• ● Type C

Yes

Yes

• ● Type E

Yes

Yes

• ● Type J

Yes

Yes

• ● Type K

Yes

Yes

• ● Type N

Yes

Yes

• ● Type R

Yes

Yes

• ● Type S

Yes

Yes

• ● Type T

Yes

Yes

• ● Type TXK/TXK(L) to GOST

Yes

Yes

Thermocouple (TC)

Temperature compensation

• — parameterizable

No

No

Analog value generation for the inputs

Measurement principle

integrating

integrating

Integration and conversion time/resolution per channel

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

15 bit; + sign

15 bit; + sign

• ● Integration time, parameterizable

No

No

• ● Interference voltage suppression for interference frequency f1 in Hz

85 dB at 50 / 60 / 400 Hz

85 dB at 50 / 60 / 400 Hz

Smoothing of measured values

• ● parameterizable

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

Repeat accuracy in steady state at 25 °C (relative to output range), (+/-)

0.5 %

0.5 %

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

• ● Common mode interference, min.

120 dB

120 dB

Interrupts/diagnostics/status information

Alarms

Yes

Yes

Diagnostic functions

Yes; Can be read out

Yes; Can be read out

Alarms

• ● Diagnostic alarm

Yes

Yes

Diagnostic messages

• ● Monitoring the supply voltage

Yes

Yes

• ● Wire-break

Yes

Yes

Diagnostics indication LED

• ● for status of the inputs

Yes

Yes

• ● for maintenance

Yes

Yes

Degree and class of protection

Degree of protection acc. to EN 60529

• ● IP20

Yes

Yes

Standards, approvals, certificates

CE mark

Yes

Yes

CSA approval

Yes

Yes

FM approval

Yes

Yes

RCM (formerly C-TICK)

Yes

Yes

Ambient conditions

Free fall

• ● Fall height, max.

0.3 m; five times, in product package

0.3 m; five times, in product package

Ambient temperature during operation

• ● permissible temperature range

-20 °C to +60 °C horizontal mounting, -20 °C to 50 °C vertical mounting, 95% humidity, non-condensing

-20 °C to +60 °C horizontal mounting, -20 °C to 50 °C vertical mounting, 95% humidity, non-condensing

• ● min.

-20 °C

-20 °C

• ● max.

60 °C

60 °C

Ambient temperature during storage/transportation

• ● min.

-40 °C

-40 °C

• ● max.

70 °C

70 °C

Air pressure acc. to IEC 60068-2-13

• ● Operation, min.

795 hPa

795 hPa

• ● Operation, max.

1 080 hPa

1 080 hPa

• ● Storage/transport, min.

660 hPa

660 hPa

• ● Storage/transport, max.

1 080 hPa

1 080 hPa

Relative humidity

• ● permissible range (without condensation) at 25 °C

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

Connection method

required front connector

Yes

Yes

Mechanics/material

Enclosure material (front)

• ● Plastic

Yes

Yes

Dimensions

Width

45 mm

45 mm

Height

100 mm

100 mm

Depth

75 mm

75 mm

Weights

Weight, approx.

180 g

220 g