Emerson Rosemount 4600 Reference Manual page 36

Installation
September 2016
Figure 3-2. Field Wiring
A. Rosemount 4600
B. R > 250 ohm
L
C. Power supply
Signal wiring grounding
Do not run signal wiring in conduit or open trays with power wiring, or near heavy electrical
equipment.
Power supply 4–20 mA transmitters
The dc power supply should provide power with less than two percent ripple. Total
resistance load is the sum of resistance from signal leads and the load resistance of the
controller, indicator, and related pieces. Note that the resistance of intrinsic safety barriers,
if used, must be included.
Note
A minimum loop resistance of 250 ohms is required to communicate with a Field
Communicator. If a single power supply is used to power more than one Rosemount 4600,
the power supply and circuitry common to the transmitter, should not have more than
20 ohms of impedance at 1200 Hz.
30
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F
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B
C
D
E
D. I/O card
E. PLC
F. Field Communicator
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