Siemens SIMATIC S7 Functional Safety Manual page 166

Technical specifications
A.2 Fail-Safe CPU technical specifications
Measurement ranges of the analog inputs for voltage of the CPU
Table A- 38 Analog input representation for voltage of the CPU
System
Decimal Hexadecimal
32767 7FFF
32512 7F00
32511 7EFF
27649 6C01
27648 6C00
20736 5100
34 22
0 0
Negative values
Analog output specifications
Table A- 39 Analog outputs
Technical data
Number of outputs
Type
Full-scale range
Full-scale range (data word)
Overshoot range
Overshoot range (data word)
Overflow range
Overflow range data word
Resolution
Output drive impedance
Isolation (field side to logic)
Accuracy (25 °C / 0 to 55 °C)
Settling time
Cable length (meters)
In an overflow condition, analog outputs will behave according to the device configuration properties settings. In the
1
"Reaction to CPU STOP" parameter, select either: "Use substitute value" or "Keep last value".
166
Voltage Measuring Range
0 to 10 V
11.851 V
11.759 V
10 V
7.5 V
12 mV
0 V
Negative values are not sup-
ported
Description
2
Current
0 to 20 mA
0 to 27648
20.01 to 23.52 mA
27649 to 32511
see footnote
1
32512 to 32767
10 bits
≤500 Ω max.
None
3.0% / 3.5% of full-scale
2 ms
100 m, shielded twisted pair
Overflow
Overshoot range
Rated range
S7-1200 Functional Safety Manual
Manual, 02/2015, A5E03470344-AA