RMS 621 10 Technical data
Endress+Hauser 57
10 Technical data
10.0.1 Input
Measured variable Current, PFM, pulse, temperature
Measuring range
Number:
• 2 x 0/4 to 20 mA/PFM/Pulse
2 x Pt100/500/1000 (in basic device)
Max. number:
• 10 (depends on number and kind of plug-in cards)
Galvanic isolation The inputs are galvanically isolated between the individual expansion cards and the basic device.
Measured variable Input
Current
•
0/4 to 20 mA +10% overreach
•
Max. input current 150 mA
•
Input impedance < 10 Ω
•
Accuracy 0.1% of full scale value
•
Temperature drift 0.04% / K ambient temperature
•
Signal attenuation low-pass filter 1st order, filter constants 0 to 99 s
•
Resolution 13 Bit
•
Fault recognition 3.6 mA and 21 mA limit as per NAMUR NE43
PFM
•
Frequency range 0.25 Hz to 12.5 kHz
•
Signal level 2 to 7 mA low; 13 to 19 mA high
•
Measurement method: period length/frequency measurement
•
Accuracy 0.01% of measured value
•
Temperature drift 0.1% / 10 K ambient temperature
Pulse
•
Frequency range 0.5 Hz to 12.5 kHz
•
Signal level 2 to 7 mA low; 13 to 19 mA high with approx. 1.3 kΩ dropping resistor at
max. 24 V voltage level
Temperature Resistance thermometer (RTD):
Designation Measuring range Accuracy (4-wire
connection)
Pt100 -200 to 800 °C (-328 to 1472 °F) 0.03% of full-scale value
Pt500 -200 to 250 °C (-328 to 482 °F) 0.1% of full-scale value
Pt1000 -200 to 250 °C -328 to 482 °F) 0.08% of full-scale value
•
Type of connection: 3- or 4-wire system
•
Measuring current 500 mA
•
Resolution 16 Bit
•
Temperature drift 0.01% / 10 K ambient temperature
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