Measurement 4…20 mA
Measurement mode | 4…20 mA | ||||
---|---|---|---|---|---|
Measuring range, nominal | 4…20 mA | ||||
Measuring range, end value (full scale value) | 20 mA | ||||
Measuring range, technically usable | 0…21.179 mA | ||||
Fuse protection | Internal overload limiting, continuous current resistant | ||||
PDO resolution | 24 Bit | ||||
PDO LSB (Extended Range) | 2.048 nA | ||||
PDO LSB (Legacy Range) | 1.907.. nA | ||||
Common-mode voltage Vcm | max. +/- 10V related to -Uv (internal ground) | ||||
Basic accuracy: Measuring deviation at 23°C, with averaging | < ±0.01%FSV = ±100 ppmFSV | ||||
Offset/Zero Point deviation (at 23°C) | EOffset | < 65 ppmFSV | |||
Gain/scale/amplification deviation (at 23°C) | EGain | < 50 ppm | |||
Non-linearity over the whole measuring range | ELin | < 40 ppmFSV | |||
Repeatability | ERep | < 40 ppmFSV | |||
Noise (without filtering) | ENoise, PtP | < 100 ppmFSV | < 781 [digits] | ||
ENoise, RMS | < 18 ppmFSV | < 141 [digits] | |||
Max. SNR | > 94.9 dB | ||||
Noisedensity@1kHz | < 5.09 | ||||
Noise (with 50Hz FIR filtering) | ENoise, PtP | < 10 ppmFSV | < 78 [digits] | ||
ENoise, RMS | < 2.0 ppmFSV | < 16 [digits] | |||
Max. SNR | > 114.0 dB | ||||
Temperature coefficient | TcGain | < 15 ppm/K typ. | |||
TcOffset | < 5 ppmFSV/K typ. | ||||
Common-mode rejection ratio (without filtering) | DC: < 3 nA/V typ. | 50 Hz: < 5 nA/V typ. | 1 kHz: < 80 nA/V typ. | ||
Common-mode rejection ratio (with 50Hz FIR filtering) | DC: < 3 nA/V typ. | 50 Hz: < 3 nA/V typ. | 1 kHz: < 3 nA/V typ. | ||
Largest short-term deviation during a specified electrical interference test | ±0.05%FSV = ±500 ppmFSV typ. | ||||
Input impedance ±Input 1 (Internal resistance) | Differential 200 Ω || 11 nF typ. | ||||
CommonMode 1 MΩ || 40 nF typ. Methodology: Resistor against -UV, capacitance against SGND | |||||
Input impedance ±Input 2 | No usage of this input in this mode |
Current measurement range 4…20 mA

Note: The channel also works in electrically bipolar mode and records negative values in the unipolar measuring ranges (measurement from 0 V, 0 mA, 4 mA, 0 Ω). This enables the channel to provide a precise diagnosis even with signals < 0. In these measuring ranges the limit value for the "Underrange Error" in Extended Mode is -1% of the full scale value (FSV). The limit value can be set in CoE object 0x80n0:32. This avoids irritating error messages if the channel is not wired (e.g. without sensor) or the electrical signal fluctuates slightly around zero. The process data value of 0x00000000 is not undershot. If the "UnderrangeError" detection is to be set even less sensitive, the magnitude of the negative limit value in the CoE object referred to above can be set even higher. |
