Electrical connection
Prosonic M FMU44 HART
18
Hauser
‣
A standard device cable suffices if only the analog signal should be used. Use a shielded
cable if working with a superimposed communication signal (HART).
Protective circuits against reverse polarity, RF influences and overvoltage peaks are
integrated in the device.
Operation via handheld terminal or PC with operating program: take minimum
communication resistance of 250 Ω and maximum load into consideration
• Superimposed communication signal (HART): use a shielded cable
• Analog signal: use a standard installation cable
• For other connections: use Commubox FXA291 or Field Xpert
6.4
Supply voltage
6.4.1
Two-wire version, HART
Terminal voltage directly at the device
Standard
• Current consumption 4 mA | terminal voltage 14 to 36 V
• Current consumption 20 mA | terminal voltage 8 to 36 V
Ex ia
• Current consumption 4 mA | terminal voltage 14 to 30 V
• Current consumption 20 mA | terminal voltage 8 to 30 V
Ex d
• Current consumption 4 mA | terminal voltage 14 to 30 V
• Current consumption 20 mA | terminal voltage 11 to 30 V
Fixed current, terminal voltage directly at the device
User-configurable, e.g. for solar powered operation (measured value via HART)
Standard
Current consumption 11 mA | terminal voltage 10 to 36 V
Ex ia
Current consumption 11 mA | terminal voltage 10 to 30 V
Fixed current for Multidrop mode
Standard
Current consumption 4 mA | (start-up current: 11 mA), terminal voltage 14 to 36 V
Ex ia
Current consumption 4 mA | (start-up current: 11 mA), terminal voltage 14 to 30 V
6.5
Potential equalization
NOTICE
The housing is isolated from the tank by the plastic sensor. Because of this,
interference signals may occur if the potential equalization line is not properly
connected.
‣
Use a short potential equalization line for optimum electromagnetic compatibility.
‣
Minimum line cross-section 2.5 mm
2
(14 AWG).
Use a ground strap if interference can be expected due to the installation conditions
(existing interfering installations).
Содержание Prosonic M FMU44
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