Hach Polymetron NA9600 sc Instructions D'utilisation page 15

4.11 Circuit diagrams for HART communication
For HART communication, refer to
Figure 9 HART voltage circuit - externally/loop powered
1 HART module
2 Hand-held terminal (Secondary
communication device)
Figure 10 HART current circuit - externally/loop powered
1 HART module
2 External power supply
Table 3 Recommended resistance values for externally/loop powered HART circuits
Power supply voltage
18–24 VDC
24–30 VDC
Figure 9, Figure 10, Table
3 External power supply
4 External device (Recorder/data acquisition
system)
3 External device (Recorder/data acquisition
system)
4 Hand-held terminal (Secondary
communication device)
Loop resistance
250–500 Ω
250–976 Ω
3, Figure 11, Figure 12 and Table 4.
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