Figure 1 Wiring diagram for external customer powered
1 4–20 mA output module
2 External device (Recorder/data
acquisition system)
Table 3 Resistance values for external customer powered
Power supply voltage
Loop minimal
resistance
12–18 VDC
0 Ω
18–24 VDC
250 Ω
3 Customer power supply
Loop maximal
resistance
250 Ω typical
500 Ω typical
Figure 2 Wiring diagram for module powered
1 4–20 mA output module
Table 4 Resistance values for module powered
Power supply voltage
Loop minimal
resistance
15 VDC
0 Ω
2 External device (HART master)
Loop maximal
resistance
350 Ω typical
English 5