Input
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Resistance measurement with constant current supply for 2- or 4-wire connections
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Digital converter resolution
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16-bit
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Filter time
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Configurable between 2 and 20 ms
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Conversion time
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|
Same sensor types
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75 ms per channel with 50 Hz filter
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When switching sensor type
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195 ms per channel with 50 Hz filter
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Conversion procedure
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Sigma-delta
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Output format
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INT or UINT for resistance measurement
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Sensor
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|
Sensor type
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Configurable per channel
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KTY10-6
|
-50 to 145°C
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KTY84-130
|
-40 to 300°C
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Pt100
|
-200 to 850°C
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Pt1000
|
-200 to 850°C
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Resistance measurement range
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0.1 to 4500 Ω / 0.05 to 2250 Ω
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Sensor standard
|
EN 60751
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Common-mode range
|
±1 VDC
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Insulation voltage between channel and bus
|
500 Veff
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Linearization method
|
Software
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Measurement current
|
250 µA ±1.25%
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Reference
|
4530 Ω ±0.1%
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Permissible input signal
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Short-term max. ±30 V
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Max. error at 25°C
|
|
Gain
|
0.01%
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Offset
|
0.015%
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Max. gain drift
|
0.003 %/°C
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Max. offset drift
|
5.25 mΩ/°C
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Nonlinearity
|
<0.002%
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Crosstalk between channels
|
<-70 dB
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Temperature sensor resolution
|
|
KTY10-6
|
1 LSB = 0.1°C
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KTY84-130
|
1 LSB = 0.1°C
|
Pt100
|
1 LSB = 0.1°C
|
Pt1000
|
1 LSB = 0.1°C
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Resistance measurement resolution
|
|
G = 1
|
1 LSB = Typ. 69.1223 mΩ ±0.1%
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G = 2
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1 LSB = Typ. 34.5611 mΩ ±0.1%
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Input filter
|
|
Cutoff frequency
|
115 Hz / First-order filter
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Slope
|
-20 dB
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Common-mode rejection
|
|
50 Hz
|
>70 dB
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DC
|
>70 dB
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Temperature measurement monitoring
|
|
Range undershoot
|
0x8001
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Range overshoot
|
0x7FFF
|
Open circuit
|
0x7FFF
|
General fault
|
0x8000
|
Open inputs
|
0x7FFF
|
Resistance measurement monitoring
|
|
Range undershoot
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0x0000
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Range overshoot
|
0xFFFF
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Open circuit
|
0xFFFF
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General fault
|
0xFFFF
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Open inputs
|
0xFFFF
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