Siemens SIMATIC S7-1200

Technical specifications
A.7 Specifications for the analog I/O
Easy Book
Manual, 03/2014, A5E02486774-AF
311
A.7
Specifications for the analog I/O
A.7.1
Specifications for the analog inputs (CPU, SM, and SB)
Table A- 36 Specifications for analog inputs (AI)
Technical data
CPU
SB
SM
Type Voltage (single-ended) Voltage or current
(differential)
Voltage or current
(differential), selectable in
groups of 2
Range 0 to 10 V ±10 V, ±5 V, ±2.5,
0 to 20 mA, or
4 mA to 20 mA
±10 V, ±5 V, ±2.5 V,
0 to 20 mA, or
4 mA to 20 mA
Resolution
10 bits
11 bits + sign bit
12 bits + sign bit
Full scale range
(data word)
0 to 27648 -27,648 to 27,648 -27,648 to 27,648
Accuracy
(25 °C / -20 to 60 °C)
3.0% / 3.5% of full-scale ±0.3% / ±0.6% of full scale ±0.1% / ±0.2% of full scale
Overshoot / undershoot range
(data word)
(See note 1)
Voltage:
27,649 to 32,511
Voltage:
32,511 to 27,649 /
-27,649 to -32,512
Voltage:
32,511 to 27,649 /
-27,649 to -32,512
Current: N/A Current:
32,511 to 27,649 /
0 to -4864
Current:
32,511 to 27,649 /
0 to -4864
Overflow / underflow (data
word)
(See note 1)
Voltage:
32,512 to 32,767
Voltage:
32,767 to 32,512 /
-32,513 to -32,768
Voltage:
32,767 to 32,512 /
-32,513 to -32,768
Current: N/A Current:
32,767 to 32,512 /
-4865 to -32,768
Current:
32,767 to 32,512 /
-4865 to -32,768
Maximum withstand voltage /
current
35 VDC (voltage) ±35 V / ±40 mA ±35 V / ±40 mA
Smoothing
(See note 2)
None, weak, medium, or
strong
None, weak, medium, or
strong
None, weak, medium, or
strong
Noise rejection
(See note 2)
10, 50, or 60 Hz 400, 60, 50, or 10 Hz 400, 60, 50, or 10 Hz
Measuring principle
Actual value conversion
Actual value conversion
Actual value conversion
Common mode rejection
40 dB, DC to 60 Hz
40 dB, DC to 60 Hz
40 dB, DC to 60 Hz
Operational signal range
(signal plus common mode
voltage)
Less than +12 V and
greater than 0 V
Less than +35 V and
greater than -35 V
Less than +12 V and greater
than -12 V