Siemens SIMATIC S7-1200

Technical specifications
A.7 Specifications for the analog I/O
Easy Book
Manual, 03/2014, A5E02486774-AF
315
A.7.5
Specifications for the analog outputs
Table A- 43 Specifications for the analog outputs (SB and SM)
Technical data
SB
SM
Type
Voltage or current
Voltage or current
Range
±10 V, 0 to 20 mA, or 4 to 20 mA
±10 V, 0 to 20 mA, or 4 to 20 mA
Resolution Voltage: 12 bits
Current: 11 bits
Voltage: 14 bits
Current: 13 bits
Full scale range
(data word)
(See note 1)
Voltage: -27,648 to 27,648
Current: 0 to 27,648
Voltage: -27,648 to 27,648
Current: 0 to 27,648
Accuracy
(25 °C / -20 to 60 °C)
±0.5% / ±1% of full scale ±0.3% / ±0.6% of full scale
Settling time
(95% of new value)
Voltage: 300 μS (R), 750 μS (1 uF)
Current: 600 μS (1 mH), 2 ms (10 mH)
Voltage: 300 μS (R), 750 μS (1 uF)
Current: 600 μS (1 mH), 2 ms (10 mH)
Load impedance Voltage: ≥ 1000 Ω
Current: ≤ 600 Ω
Voltage: ≥ 1000 Ω
Current: ≤ 600 Ω
Behavior on RUN to STOP Last value or substitute value (default
value 0)
Last value or substitute value (default
value 0)
Isolation
(field side to logic)
None None
Cable length (meters)
100 m, twisted and shielded
100 m, twisted and shielded
Diagnostics
• Overflow / underflow
• Short to ground (voltage mode only)
• Wire break (current mode only)
• Overflow / underflow
• Short to ground (voltage mode only)
• Wire break (current mode only)
• 24 VDC low voltage
Note 1: Refer to the output ranges for voltage and current (Page 315) for the full-scale range.
A.7.6
Output (AQ) measurement ranges for voltage and current
Table A- 44 Analog output representation for voltage (SB and SM)
System
Voltage Output Range
Decimal
Hexadecimal
± 10 V
32767
7FFF
See note 1
Overflow
32512
7F00
See note 1
32511
7EFF
11.76 V
Overshoot range
27649
6C01
27648
6C00
10 V
Rated range
20736
5100
7.5 V
1
1
361.7 μ V
0
0
0 V