Siemens SIMATIC S7-1200

Technical specifications
A.2 Fail-Safe CPU technical specifications
S7-1200 Functional Safety Manual
Manual, 02/2015, A5E03470344-AA
155
A.2.2.5
Analog inputs
Table A- 18 Analog inputs
Technical data
Description
Number of inputs
2
Type
Voltage (single-ended)
Full-scale range
0 to 10 V
Full-scale range (data word) 0 to 27648
Overshoot range
10.001 to 11.759 V
Overshoot range (data word)
27649 to 32511
Overflow range
11.760 to 11.852 V
Overflow range (data word)
32512 to 32767
Resolution
10 bits
Maximum withstand voltage
35 VDC
Smoothing None, Weak, Medium, or Strong
See the table for step response (ms) for the analog inputs of the CPU
(Page 155).
Noise rejection
10, 50, or 60 Hz
Impedance
≥100 KΩ
Isolation (field side to logic)
None
Accuracy (25 °C / 0 to 55 °C)
3.0% / 3.5% of full-scale
Cable length (meters)
100 m, shielded twisted pair
Step response of built-in analog inputs of the CPU
Table A- 19 Step Response (ms), 0 V to 10 V measured at 95%
Smoothing selection (sample averaging)
Rejection frequency (Integration time)
60 Hz
50 Hz
10 Hz
None (1 cycle): No averaging
50 ms
50 ms
100 ms
Weak (4 cycles): 4 samples
60 ms
70 ms
200 ms
Medium (16 cycles): 16 samples
200 ms
240 ms
1150 ms
Strong (32 cycles): 32 samples 400 ms 480 ms 2300 ms
Sample time
4.17 ms
5 ms
25 ms
Sample time for the built-in analog ports of the CPU
Table A- 20 Sample time for built-in analog inputs of the CPU
Rejection frequency (Integration time selection)
Sample time
60 Hz (16.6 ms) 4.17 ms
50 Hz (20 ms)
5 ms
10 Hz (100 ms)
25 ms