Advantech iDAQ-871 handleiding
Handleiding
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7 iDAQ-871_873 User Manual
Chapter 2 Installation Guide
2.3 Signal Connection and Pin Assignment
The iDAQ-871 offers a choice of three bridge completion types based on the sensor
connected to the module, whereas the iDAQ-873 is specifically designed for quarter-
bridge applications. Details regarding field wiring connections and pin assignments
for each module are provided in the following section.
2.3.1 Quarter-Bridge Input Signal Connection
For quarter-bridge input, one of the four bridge arms serves as the external sensing
element, while the other three arms are completed by the device's internal resistors.
This setup is known as quarter-bridge completion. Figure 2.2 and Figure 2.3 illustrate
the 3-wire quarter-bridge input signal connection for iDAQ-871 and iDAQ-873,
respectively. To connect the strain gauge sensor (R
B1
), attach one end (1-wire side)
to the EX+ terminal (EX for iDAQ-873) and the other end (2-wire side) to both the
QTR/SC+ and AI+ terminals (QTR/SC and AI for iDAQ-873) using separate wires.
Additionally, connect the SC- terminal to the EX- terminal for shunt calibration (appli-
cable to iDAQ-871 only). Since remote sensing does not apply to quarter-bridge input
configuration, simply connect the RS+ and RS- terminals to the EX+ and EX- termi-
nals, respectively, on iDAQ-871. Note that the resistance of the quarter-bridge com-
pletion resistor RQB must match the nominal resistance of the strain gauge R
B1
.
Figure 2.2 3-wire quarter-bridge input signal connection for iDAQ-871
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Productinformatie
| Merk | Advantech |
| Model | iDAQ-871 |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 5398 MB |
