Analog Input Module Sm 331; Ai 8 X Rtd (6Es7331-7Pf00-0Ab0) - Siemens SIMATIC S7-300 Reference Manual
Programmable logic controllers module data
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Special characteristics of the wire-break check for the 4 to 20 mA measuring
range
With a parameterized measuring range of 4 to 20 mA and enabled wire-break
check, the analog input module enters wire-break in the diagnosis when a current
falls below 3.6 mA.
If you have enabled diagnostics interrupt during configuration, the module
additionally triggers a diagnostic interrupt.
If no diagnostic interrupt has been enabled, the illuminated SF LED is the only
indication of the wire-break and you must evaluate the diagnostic bytes in the user
program.
With a parameterized measuring range of 4 to 20 mA and disabled wire-break
check and enabled diagnostic interrupt, the module triggers a diagnostic interrupt
when the underflow is reached.
4.23
Analog Input Module SM 331; AI 8 x RTD
(6ES7331-7PF00-0AB0)
Order number
6ES7331-7PF00-0AB0
Characteristics
The analog input module SM 331; AI 8 x RTD has the following characteristic
features:
• 8 differential inputs for RTD resistance temperature detector in 4 channel
groups
• Optional setting of the resistance thermometer type per channel group
• Rapid measured value updating for up to 4 channels
• Measured-value resolution 15 bits + sign (independent of integration time)
• Programmable diagnostics
• Programmable diagnostic interrupt
• 8 channels with limit monitoring
• Programmable hardware interrupt when limit has been exceeded
• Programmable end-of-scan-cycle interrupt
• Isolated against the backplane bus interface
Programmable Logic Controllers S7-300 Module Data
A5E00105505-03
Analog Modules
4-125
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