Promag 53 PROFIBUS DP/PA Technical data
Endress+Hauser 157
10 Technical data
10.1 Technical data at a glance
10.1.1 Applications
→ 4
10.1.2 Function and system design
Measuring principle
Electromagnetic flow measurement on the basis of Faraday’s Law.
Measuring system
→ 6
10.1.3 Input variables
Measured variable
Flow rate (proportional to induced voltage)
Measuring range
Typically v = 0.01 to 10 m/s (0.03 to 0.33 ft/s) with the specified measuring accuracy
Operable flow range
Over 1000 : 1
Input signal
Status input (auxiliary input):
U = 3 to 30 V DC, R
i
= 3 k, galvanically isolated.
Switch level: ±3 to ±30 VDC, independent of polarity
10.1.4 Output variables
Output signal
Current output
Active/passive selectable, galvanically isolated, time constant selectable (0.01 to 100 s),
Full scale value adjustable, temperature coefficient: typically 0.005% o.r./°C, resolution:
0.5 μA
• Active: 0/4 to 20 mA, R
L
max. 700
• Passive: 4 to 20 mA; supply voltage V
S
18 to 30 V DC; R
i
150
Pulse/frequency output:
Active/passive selectable, galvanically isolated
• Active: 24 V DC, 25 mA (max. 250 mA during 20 ms), R
L
> 100
• Passive: open collector, 30 V DC, 250 mA
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