5.7 Analog output
The analog output signal is a 4-20 mA current loop. Depending on the IS
output option, the loop can be powered internally or externally via a
hardware switch located on the front of the electronics stack. The switch is
set to internal power when shipped from the factory. Intrinsically safe analog
output requires a shielded twisted pair cable. For HART communication, a
minimum resistance of 250 ohms is required. It is recommended to use
individually shielded twisted pair cable. The minimum conductor size is
24 AWG (0.51 mm) diameter for cable runs less than 5,000 feet (1,500 m)
and 20 AWG (0.81 mm) diameter for longer distances.
Note
For more information about the analog output characteristics, refer to the
product reference manual.
Figure 5-9: Analog output wiring
A B
A. Terminal #7
B. Terminal #8
Note
Terminal polarity for the analog output is reversed between internally and
externally powered.
Quick Start Guide November 2019
24 Rosemount
™
8782 Slurry Magnetic Flow Meter Transmitter
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