Analog Input Module Sm 331; Ai 2 X 12 Bits; (6Es7331-7Kb02-0Ab0) - Siemens SIMATIC S7-300 Reference Manual
Programmable logic controllers module data
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4.25
Analog Input Module SM 331; AI 2 x 12 bits;
(6ES7331-7KB02-0AB0)
Order number: "Standard module"
6ES7331-7KB02-0AB0
Order number: "SIPLUS S7-300-Module"
6AG1 331-7KB02-2AB0
Characteristics
The analog input module SM 331; AI 2 x 12 bits has the following characteristic
features:
• Two inputs in one channel group
• Measured-value resolution (depending on the integration time set)
– 9 bits + sign
– 12 bits + sign
– 14 bits + sign
• Measuring method selectable per channel group:
– Voltage
– Current
– Resistors
– Temperature
• Arbitrary measuring range selection per channel group
• Programmable diagnostics
• Programmable diagnostic interrupt
• One channel with limit monitoring
• Programmable hardware interrupt when limit has been exceeded
• Isolated against the backplane bus interface
• Isolated against load voltage (except when at least one
coding key is inserted in position D)
Resolution
The resolution of the measured value is a direct function of the integration time
selected. In other words the longer the integration time for an analog input channel,
the more accurate the resolution of the measured value will be (see Technical
Specifications of the module and Table 4-6 on page 4-10).
Programmable Logic Controllers S7-300 Module Data
A5E00105505-03
Analog Modules
4-153
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