4-4
Cabling and Wiring
Figure 4-3. 4 to 20 mA Current Loop Output Configuration
You must maintain a minimum of 8 V across this output circuit to ensure
correct operation. The maximum voltage should not exceed 36 V to stay
within power-dissipation capabilities. A 24 or 36 V supply is ideal.
Figures 4-4 and 4-5 shows two ways of connecting the process loop. The
floating-load way allows additional loops to be powered by the same
supply but constrains the load to 2-wire floating.
Figure 4-4. 4 to 20 mA Current Output (Floating Load)
LL GND
Pins 2 to 12
+
−
4 mA
4 to 20 mA Output
Pins 19 and 25
Unipolar
Output
R
L
DAC-02
LL GND
Loop
Supply
4 to 20 mA
+
−
To
Other
Loops
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