Siemens Simatic S7-300 Analog input, isolated, 40-poleSM 331 Analog input modules can be used to connect the PLC to analog process signals. They are suitable for the connection of voltage and current sensors, thermocouples, resistors and resistance thermometers. The analog input modules convert analog signals from the process into digital signals for internal processing in the PLC. Resolution from 9 bit to 15 bit + sign (with different conversion times), can be parameterized.
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Siemens Simatic S7-300 Analog input, isolated, 40-pole