Siemens SIMATIC S7 System Manual page 715
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- System manual (866 pages) ,
- Functional safety manual (212 pages) ,
- User manual (134 pages)
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Technical data
Range
Nominal range (data word)
Overshoot/undershoot range
(data word)
Overflow/underflow (data word)
Resolution
Temperature
Resistance
Maximum withstand voltage
Noise rejection
Common mode rejection
Impedance
Isolation
Field side to logic
Field to 24 VDC
24 VDC to logic
Channel to channel isolation
Accuracy
Repeatability
Maximum sensor dissipation
Measuring principle
Module update time
Cable length (meters)
Wire resistance
Table A- 102 Diagnostics
Technical data
Overflow/underflow
1,2
Wire break
3
24 VDC low voltage
1
The overflow, underflow and low voltage diagnostic alarm information will be reported in the analog data values even if
1
the alarms are disabled in the module configuration.
For resistance ranges underflow detection is never enabled.
2
When wire break alarm is disabled and an open wire condition exists in the sensor wiring, the module may report
3
random values.
S7-1200 Programmable controller
System Manual, 11/2011, A5E02486680-05
SM 1231 AI 4 x RTD x 16 bit
See RTD Sensor selection table
(Page 717).
0.1° C/0.1° F
15 bits plus sign
± 35 V
85 dB for the selected noise reduction
(10 Hz, 50 Hz, 60 Hz or 400 Hz)
> 120dB
≥ 10 MΩ
500 VAC
500 VAC
500 VAC
none
See RTD Sensor selection table
(Page 717).
±0.05% FS
0.5m W
Integrating
See Noise reduction selection table
(Page 717).
100 meters to sensor max.
20 Ω, 2.7 Ω for 10 Ω RTD max.
SM 1231 AI 4 x RTD x 16 bit
Yes
Yes
Yes
553BTechnical specifications
A.7 Thermocouple and RTD signal modules (SMs)
SM 1231 AI 8 x RTD x16 bit
See RTD Sensor selection table
(Page 717).
0.1° C/0.1° F
15 bits plus sign
± 35 V
85 dB for the selected noise reduction
(10 Hz, 50 Hz, 60 Hz or 400 Hz)
> 120dB
≥ 10 MΩ
500 VAC
500 VAC
500 VAC
none
See RTD Sensor selection table
(Page 717).
±0.05% FS
0.5m W
Integrating
See Noise reduction selection table
(Page 717).
100 meters to sensor max.
20 Ω, 2.7 Ω for 10 Ω RTD max.
SM 1231 AI 8 x RTD x16 bit
Yes
Yes
Yes
715
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