General information
Product type designationSM 1233, AI 4x 14 bit/AQ 4x 14 bit
Supply voltage
Rated value (DC)24 V
permissible range, lower limit (DC)20.4 V
permissible range, upper limit (DC)28.8 V
Input current
Current consumption, typ.40 mA
from backplane bus 5 V DC, typ.80 mA
Power loss
Power loss, typ.4.7 W
Analog inputs
Number of analog inputs4; 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.0.625 ms; at 400 Hz rejection
Input ranges
VoltageYes; ±10V, ±5V, ±2.5V
CurrentYes; 4 to 20 mA, 0 to 20 mA
Input ranges (rated values), voltages
-10 V to +10 VYes
— Input resistance (-10 V to +10 V)≥1 MOhm
-2.5 V to +2.5 VYes
— Input resistance (-2.5 V to +2.5 V)≥1 MOhm
-5 V to +5 VYes
— Input resistance (-5 V to +5 V)≥1 MOhm
Input ranges (rated values), currents
0 to 20 mAYes
— Input resistance (0 to 20 mA)< 290 Ω, > 270 Ω
4 mA to 20 mAYes
— Input resistance (4 mA to 20 mA)< 290 Ω, > 270 Ω
Cable length
shielded, max.100 m; shielded, twisted pair
Analog outputs
Number of analog outputs4; Current or voltage
Output ranges, voltage
-10 V to +10 VYes
Output ranges, current
0 to 20 mAYes
4 mA to 20 mAYes
Load impedance (in rated range of output)
with voltage outputs, min.1 000 Ω
with current outputs, max.600 Ω
Cable length
shielded, max.100 m; shielded, twisted pair
Analog value generation for the inputs
Measurement principlesuccessive approximation
Integration and conversion time/resolution per channel
Resolution with overrange (bit including sign), max.13 bit; + sign
Integration time, parameterizableYes
Interference voltage suppression for interference frequency f1 in Hz40 dB, DC to 60 Hz
Smoothing of measured values
ParameterizableYes
Step: NoneYes
Step: lowYes
Step: MediumYes
Step: HighYes
Integration and conversion time/resolution per channel
Resolution with overrange (bit including sign), max.14 bit; Voltage: 14 bit; Current : 13 bit
Errors/accuracies
Temperature error (relative to input range), (+/-)25 °C ±0.1 % / -20 °C to 60 °C ±0.2 % of the full-scale deflection
Temperature error (relative to output range), (+/-)25 °C ±0.3 % / -20 °C to 60 °C ±0.6 % of the full-scale deflection
Basic error limit (operational limit at 25 °C)
Voltage, relative to input range, (+/-)0.1 %
Current, relative to input range, (+/-)0.1 %
Voltage, relative to output range, (+/-)0.3 %
Current, relative to output range, (+/-)0.3 %
Interference voltage suppression for f = n x (f1 +/- 1 %), f1 = interference frequency
Common mode voltage, max.2 V
Interrupts/diagnostics/status information
Diagnostics functionYes
Alarms
Diagnostic alarmYes
Diagnoses
Monitoring the supply voltageYes
Wire breakYes
short-circuitYes
Diagnostics indication LED
DIAG LEDYes
for status of the inputsYes
for status of the outputsYes
Potential separation analog inputs
between the channels and the power supply of the electronicsNo
Potential separation analog outputs
between the channels and the power supply of the electronicsNo
Degree and class of protection
IP degree of protectionIP20
Standards, approvals, certificates
Siemens Eco Profile (SEP)Siemens EcoTech
CE markYes
CSA approvalNo
UL approvalYes
cULusYes
FM approvalNo
RCM (formerly C-TICK)Yes
KC approvalYes
Marine approvalNo
Ecological footprint
environmental product declarationYes; type 2 acc. to ISO 14021
Global warming potential
— global warming potential, (total) [CO2 eq]32.2 kg
— global warming potential, (during production) [CO2 eq]7.96 kg
— global warming potential, (during operation) [CO2 eq]24.5 kg
— global warming potential, (after end of life cycle) [CO2 eq]-0.358 kg
Free fall
Fall height, max.0.3 m; five times, in product package
Ambient temperature during operation
min.-20 °C
max.40 °C; at max. voltages and max. specifications
horizontal installation, min.-20 °C
horizontal installation, max.60 °C; at rated voltages, 50 % of max. specification and alternate IO active
vertical installation, min.-20 °C
vertical installation, max.50 °C; at rated voltages, 50 % of max. specification and alternate IO active
Ambient temperature during storage/transportation
min.-40 °C
max.70 °C
Air pressure acc. to IEC 60068-2-13
Operation, min.540 hPa
Operation, max.1 140 hPa
Storage/transport, min.540 hPa
Storage/transport, max.1 140 hPa
Altitude during operation relating to sea level
Installation altitude, min.-1 000 m
Installation altitude, max.5 000 m; Restrictions for installation altitudes > 2 000 m, see manual
Relative humidity
Operation at 25 ℃ without condensation, max.95 %
Vibrations
Vibration resistance during operation acc. to IEC 60068-2-63.5 mm from 5 - 8.4 Hz, 1g from 8.4 - 150 Hz
Operation, tested according to IEC 60068-2-6Yes
Shock testing
tested according to IEC 60068-2-27Yes; IEC 68, Part 2-27 half-sine: strength of the shock 15 g (peak value), duration 11 ms
Pollutant concentrations
SO2 at RH < 60% without condensationS02: < 0.5 ppm; H2S: < 0.1 ppm; RH < 60 % condensation-free
Connection method
required front connectorNo
Mechanics/material
plasticYes
Dimensions
Width30 mm
Height125 mm
Depth100 mm
Weights
Weight, approx.174 g