Power Requirements - Emerson Micro Motion Quick Start Manual

Planning
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1.3

Power requirements

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Note
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Verify that the local ambient and process temperatures are within the limits of the
LNG meters.
Verify that you are using low-voltage DC power for the core processor. Excess
voltage can damage the core processor.
For I.S. applications, refer to Micro Motion ATEX, UL, or CSA installation instructions.
Mount the LNG electronics in any orientation as long as the conduit openings do not
point upward.
CAUTION!
Upward-facing conduit openings risk condensation entering the housing that can
damage the electronics.
Install the sensors so that the flow direction arrow on the case matches the actual
forward flow of the process. (Flow direction is also software-selectable.)
LNGS06
Gas return sensor
18 to 30 VDC, 3 watts typical, 5 watts maximum
Minimum 28 VDC with 300 meters of 1 mm
At startup, power source must provide a minimum of 0.5 amperes of short term
current at a minimum of 18 volts at the electrical parts power input terminals
The maximum steady state current is 0.2A
Complies with Installation (Overvoltage) Category II, Pollution Degree 2
Power requirements assume a single core processor per cable.
Length and conductor diameter of the power cable must be sized to provide 18 VDC
minimum at the power terminals, at a load current of 0.2 amps.
LNGM10
Filling sensor
2
power-supply cable
Micro Motion Liquified Natural Gas Meter