Emerson Rosemount 8782 Reference Manual page 51

Reference Manual
00809-0100-8782
Figure 6-5: Output Option Code B—24 VDC Supply
A. Resistance (Ω)
B. Cable length (feet)
At 5000 Hz operation with a 24 VDC supply, pull-up resistances of 1000 to 10,000 Ohms
allow cable lengths up to 660 ft (200 m). Resistances from 1000 to 2500 Ohms allow a
cable length of 1000 ft (330 m).
Connecting an external power supply
Note
Total loop impedance must be sufficient to keep loop current below maximum rating. A
resistor can be added in the loop to raise impedance.
Reference Manual
Advanced installation details
November 2019
51