SIMATIC S7-400
Analog modules
SM 431 analog input module
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Siemens ST 70 · 2013
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Technical specifications (continued)
Encoder
Connection of signal encoders
• for current measurement
as 2-wire transducer
Yes
• for current measurement
as 4-wire transducer
Yes Yes
• for resistance measurement
with 2-conductor connection
Yes; Line resistances are also mea-
sured
• for resistance measurement
with 3-conductor connection
Yes Yes
• for resistance measurement
with 4-conductor connection
Yes Yes Yes
Errors/accuracies
Operational limit in overall temperature
range
• Voltage, relative to input area +/- 0,3 %;
+/-0.3% at +/-250 mV, +/-500 mV,
+/-1 V, +/-2.5 V, +/-5 V, 1 to 5 V,
+/- 10 V; +/-0.31% at +/-80 mV;
+/-0.32% at +/-50 mV; +/-0.35%
at +/-25 mV;
+/- 0,3 %
• Current, relative to input area +/- 0,3 %; at 0 to 20 mA, +/-5 mA,
+/-10 mA, +/- 20 mA, 4 to 20 mA
+/- 0,5 %
• Impedance, relative to input area +/- 0,3 %; +/-0.3% at 0 to 48 Ohm
(4-conductor measurement),
0 to 150 Ohm (4-conductor measure-
ment), 0 to 300 Ohm (4-conductor
measurement), 0 to 600 Ohm
(4-conductor measurement),
0 to 5000 Ohm (4-conductor mea-
surement, in range of 6000 Ohm);
+/-0.4% at 0 to 300 Ohm (3-conductor
measurement), 0 to 600 Ohm
(3-conductor measurement),
0 to 5000 Ohm (3-conductor mea-
surement, in range of 6000 Ohm);
• Resistance-type thermometer,
relative to input area
+/- 0,4 % +/-1 °C
Basic error limit
(operational limit at 25 °C)
• Voltage, relative to input area +/- 0,15 %;
+/-0.15% at +/-250 mV, +/-500 mV,
+/-1 V, +/-2.5 V, +/-5 V, 1 to 5 V,
+/-10 V; +/-0.17% at +/-80 mV;
+/-0.19% at +/-50 mV; +/-0.23%
at +/-25 mV;
+/- 0,1 %
• Current, relative to input area +/- 0,15 %; at 0 to 20 mA, +/-5 mA,
+/-10 mA, +/- 20 mA, 4 to 20 mA
+/- 0,17 %
• Impedance, relative to input area +/- 0,15 %; +/-0.15% at 0 to 48 ohms
(4-conductor measurement),
0 to 150 ohms (4-conductor measure-
ment), 0 to 300 ohms (4-conductor
measurement), 0 to 5000 ohms
(4-conductor measurement,
in range of 6000 ohms); +/-0.3%
at 0 to 300 ohms
(3-conductor measurement),
0 to 600 ohms (3-conductor
measurement), 0 to 5000 ohms
(3-conductor measurement,
in range of 6000 ohms)
• Resistance-type thermometer,
relative to input area
+/- 0,3 % +/-0.2 °C
6ES7 431-7QH00-0AB0 6ES7 431-7KF00-0AB0 6ES7 431-7KF10-0AB0
Kap_06_eng.book Seite 70 Donnerstag, 2. Mai 2013 4:16 16
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