Siemens Simatic S7-300 - Page 263

Analog modules
6.5 Analog input module SM 331; AI 8 x 14 Bit High Speed; synchronous; (6ES7331-7HF0x-0AB0)
S7-300 Automation System Module data
Manual, 08/2006, A5E00105505-04
6-29
Terminal assignment
The following diagrams show different possible forms of wiring.
Wiring: Voltage measurement
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Figure 6-7 Block diagram and wiring diagram
Measuring range module settings
Measuring range Measuring range module setting
± 1V A
± 5V B
± 10V B (Default)
1...5V B