Quick Installation Guide
00825-0100-4727, Rev CC
January 2013
Rosemount 8700 Series
21
Internal Power Source
The 4–20 mA analog signal loop is powered from the transmitter itself.
External Power Source
The 4–20 mA analog signal loop is powered from an external power source. HART
multidrop installations require a 10–30 V DC external analog power source.
NOTE:
If a HART Field Communicator or control system will be used, it must be connected across a
minimum of 250 ohms resistance in the loop.
To connect any of the other output options (pulse output and/or digital input/output), consult
the comprehensive product manual.
Powering the Transmitter
The 8712E / 8732E transmitter is designed to be powered by 90-250 Vac, 50–60 Hz or
12–42 Vdc. Before connecting power to the Rosemount 8712E / 8732E, consider the
following standards and be sure to have the proper power supply, conduit, and other
accessories. Wire the transmitter according to national, local, and plant electrical
requirements for the supply voltage. See Figure 20.
Figure 20. DC Power Supply Current Requirements
12
18
24
30
36
42
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
Power Supply (Volts)
I = Supply current requirement (Amps)
V = Power supply voltage (Volts)
Supply Current (Amps)
4727_revCC_QIG.fm Page 21 Thursday, January 10, 2013 6:08 PM
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