Analog modules
6.9 Analog input module SM 331; AI 8 x RTD; (6ES7331-7PF01-0AB0)
S7-300 Automation System Module data
6-78 Manual, 08/2006, A5E00105505-04
Technical data
Wiring signal transducers
• for resistance measurement
with 2-wire connection
with 3-wire connection
with 4-wire connection
with 40-pin front connector
supported
supported***
supported
Characteristic linearization
• Resistance thermometer
• Technical unit of temperature measurements
Pt 10, Pt 50, Pt 100, Pt 200, Pt 500, Pt 1000,
Ni 100, Ni 120, Ni 200, Ni 500, Ni 1000, LG-Ni
1000, Cu 10, Cu 50, Cu 100 (standard and Klima
range)
Degrees Centigrade; degrees Fahrenheit
* With 3-wire connections, resistance measurements to compensate for line resistors at
intervals of five minutes.
** Wire-break monitoring in 4-channel mode (hardware filter) at intervals of three seconds.
*** The maximum line resistor for 3-wire transducer measurements for the RTD elements PT
10 and Cu 10 is 10 Ω. The maximum line resistor for all other RTD elements during 3-wire
transducer measurements is 20 Ω.
**** In 4-channel mode, the converted value tunes to 100 % within 80 ms. The value
established in this process is set every typ. 3.3 ms (max. 10 ms).
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