SIMATIC S7-1200
Analog modules
SM 1231 thermocouple module
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Siemens ST 70 · 2011
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Technical specifications (continued)
Analog value creation
Measurement principle Integrating Integrating
Integrations 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 inter-
ference frequency f1 in Hz
85 dB at 50/60/400 Hz 85 dB at 50/60/400 Hz
Analog value generation (in isochronous
mode)
Smoothing of measured values
• Parameterizable Yes Yes
Errors/accuracies
Cold connection point +/-1.5 °C
Temperature error (relative to input area)
25°C ±0.1% to 55°C ±0.2% total measurement
range
25°C ±0.1% to 55°C ±0.2% total measurement
range
Interference voltage suppression for
f = n x (fl +/- 1%), fl = interference frequency
• Common mode interference, min. 120 dB 120 dB
Alarms/diagnostics/status information
Alarms
•Alarms Yes Yes
• Diagnostic alarm Yes Yes
Diagnostics
• Diagnostic functions Yes; can be read out Yes; can be read out
• Monitoring the supply voltage to the electronics Yes Yes
•Wire break Yes Yes
Diagnostic indication LED
• for status of the inputs Yes Yes
• for maintenance
Yes Yes
Climatic and mechanical conditions for
storage and transport
Climatic conditions for storage and transport
•Free fall
- Drop height, max. (in packaging) 0.3 m; five times, in dispatch package 0.3 m; five times, in dispatch package
•Temperature
- Permissible temperature range -40 °C to +70 °C -40 °C to +70 °C
• Air pressure acc. to IEC 60068-2-13
- Permissible air pressure 1080 to 660 hPa 1080 to 660 hPa
• Relative humidity
- Permissible range (without condensation) at
25 °C
95% 95%
Mechanical and climatic conditions during
operation
Climatic conditions in operation
•Temperature
- Permissible temperature range 0° C to 55° C horizontal mounting
0° C to 45° C vertical mounting
0° C to 55° C horizontal mounting
0° C to 45° C vertical mounting
• Air pressure acc. to IEC 60068-2-13
- Permissible air pressure 1080 to 795 hPa 1080 to 795 hPa
• Pollutant concentrations
-SO
2
at RH < 60% without condensation S0
2
: < 0.5 ppm; H
2
S: < 0.1 ppm; RH < 60%
condensation-free
S0
2
: < 0.5 ppm; H
2
S: < 0.1 ppm; RH < 60%
condensation-free
6ES7 231-5QD30-0XB0 6ES7 231-5QF30-0XB0
© Siemens AG 2011
© Siemens AG 2011
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