WebDAQ 504 User's Guide Functional Details
13
Use the web interface to individually configure each input for voltage or Integrated Electronic Piezoelectric
(IEPE) sensor measurements. IEPE sensor types include acceleration, sound pressure, velocity, and force.
Voltage channels can be configured for AC or DC coupling. IEPE channels are automatically configured for
AC coupling. An internal excitation source current is automatically enabled for IEPE sensor types.
Analog signal connections
You can connect ground-referenced or floating signal sources to the WebDAQ 504. Use a floating connection
to minimize ground noise.
If you make a ground-referenced connection between the signal source and the WebDAQ 504, make sure the
voltage on the AI– shell is in the common-mode range to ensure proper operation. The AI- shell is protected
against accidental contact with overvoltages within the overvoltage protection range. Refer to the Specifications
chapter on page 20 for more information about operating voltages and overvoltage protection.
Figure 6 shows a diagram for connecting a grounded signal source to the WebDAQ 504.
Figure 6. Connecting a grounded IEPE sensor
Figure 7 shows a diagram for connecting a floating signal source to the WebDAQ 504.
Figure 7. Connecting a floating IEPE sensor
Rear panel components
Rear panel components are shown in Figure 8.
Figure 8. Rear panel
LED status indicators (4)
Ground connector with
grounding screw
3 Function button 6 Factory reset button 9 USB connectors
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