Emerson Micro Motion Elite Coriolis Micro Motion Elite Coriolis CMF025 - Connect 4-Wire Cable

CAUTION!
Fully close and tighten all housing covers and conduit openings. Improperly sealed housings
can expose electronics to moisture, which can cause measurement error or flowmeter failure.
Inspect and grease all gaskets and O-rings.
3.2 Connect 4-wire cable
3.2.1 4-wire cable types and usage
Micro Motion offers two types of 4-wire cable: shielded and armored. Both types contain
shield drain wires.
The cable supplied by Micro Motion consists of one pair of red and black 18 AWG
0.75 mm
2
wires for the VDC connection, and one pair of white and green 22 AWG
0.35 mm
2
wires for the RS-485 connection.
User-supplied cable must meet the following requirements:
• Twisted pair construction.
• Applicable hazardous area requirements, if the core processor is installed in a
hazardous area.
• Wire gauge appropriate for the cable length between the core processor and the
transmitter, or the host.
Wire gaugeTable 3-2:
Wire gauge Maximum cable length
VDC 22 AWG (0.35 mm
2
) 300 ft (90 m)
VDC 20 AWG (0.5 mm
2
) 500 ft (150 m)
VDC 18 AWG (0.8 mm
2
) 1000 ft (300 m)
RS-485 22 AWG (0.35 mm
2
) or larger 1000 ft (300 m)
3.2.2 Prepare a cable with a metal conduit
1. Remove the core processor cover using a flat-blade screw driver.
2. Run the conduit to the sensor.
3. Pull the cable through the conduit.
4. Cut the drain wires and let them float at both ends of the conduit.
Transmitter power and I/O wiring
Installation Manual 23