Siemens SIMATIC - Page 312

Analog modules
6.3 Analog input module SM 331; AI 8 x 16 bit; (6ES7331-7NF00-0AB0)
S7-300 Module data
312 Manual, 06/2017, A5E00105505-AJ
Technical specifications
Interference frequency suppression and error limits
Interference frequency suppression at f = n (f1 1%), (f1 = interference frequency); n= 1, 2, ...
• Common mode interference (CMV < 50 V)
•
Series mode interference (peak value of interference < rated
input range)
> 100 dB
> 90 dB
Crosstalk between inputs > 100 dB
Operational limit (across entire temperature range, relative to
measurement range end value in the selected input range)
C
MV
= 0 / CMV = ±50 V
• Voltage input
• Current input
±0.1% / ± 0.7%
±0.3% / ± 0.9%
Basic error limit (operational limit at 25 °C, relative to measurement range end value in the selected input range)
• Voltage input
• Current input
±0.05%
±0.05%
Temperature error (relative to input range)
± 0.005%/K
Linearity error (relative to input range)
±0.03%
Repeat accuracy (in transient state at 25 °C, relative to input
range)
±0.025%
Status, interrupts, diagnostics
Interrupts
• Limit interrupt
• Diagnostic interrupt
programmable
Channels 0 and 2
programmable
Diagnostic functions
• Group error display
• Reading diagnostic information
programmable
red LED (SF)
supported
Encoder selection data
Input ranges (rated values) / input impedance
• Voltage
± 5 V
1 V to 5 V
± 10 V
/ 2 MΩ
/ 2 MΩ
/ 2 MΩ
• Current
0 mA to 20 mA
± 20 mA
4 mA to 20 mA
/ 250 Ω
/ 250 Ω
/ 250 Ω
Maximum voltage at voltage input (destruction limit) max. 50 V, continuous
Maximum current at current input (destruction limit)
max. 32 mA
Wiring of the signal transmitters using a 40pin front connector
• for voltage measurement
• for current measurement
– as 2-wire transducer
– as 4-wire transducer
supported
possible, with separate transducer supply
supported