Emerson 8712E manual Transmitter to Sensor Wiring, Remote Mount Cable Requirements and Preparation

Page 19

Quick Installation Guide

00825-0100-4664, Rev BB January 2013

Rosemount 8712 / 8700 Series

Run the appropriate size cable through the conduit connections in your magnetic flowmeter system. Run the power cable from the power source to the transmitter. Run the coil drive and signal cables between the flowmeter sensor and transmitter.

•Installed signal wiring should not be run together and should not be in the same cable tray as AC or DC power wiring.

•Device must be properly grounded or earthed according to local electric codes.

•Rosemount combination cable part number 08732-0753-1003 (ft) or 08732-0753-2004

(m)is required to be used to meet EMC requirements.

Transmitter to Sensor Wiring

The transmitter can be integral to the sensor or remotely mounted following the wiring instructions.

Remote Mount Cable Requirements and Preparation

For installations using the individual coil drive and signal cable, lengths should be limited to less than 1,000 feet (300 meters). Equal length cable is required for each. See Table 7.

For installations using the combination coil drive and signal cable, lengths should be limited to less than 330 feet (100 meters). See Table 7.

Prepare the ends of the coil drive and signal cables as shown in Figure 15. Limit the unshielded wire length to 1-inch on both the coil drive and signal cables. Any unsheathed wire should be wrapped with proper insulation. Excessive lead length or failure to connect cable shields can create electrical noise resulting in unstable meter readings.

Figure 15. Cable Preparation Detail

NOTE

Dimensions are in inches (millimeters).

1.00

(26)

Cable Shield

19

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Contents Quick Installation Guide Private Limited Management Asia PacificMechanical Considerations PRE-INSTALLATION305 Dimensions are in inches millimeters109 12.02Environmental Considerations Installation ProceduresIdentify Options and Configurations Hardware Jumpers/SwitchesElectrical Considerations HandlingSensor Orientation MountingUpstream/Downstream Piping Flow DirectionFlow Flange Bolts InstallationFlanged Sensors GasketsCode Size ClassPound-feet Newton PTFE/ETFE liner PN10 SizeNewton Code Meter Polyurethane, Linatex, Adiprene and Neoprene Liners Size Alignment Wafer SensorsNominal Sensor Size Rosemount Alignment Spacer Table Line Size Dash No Alignment and Bolting Sanitary SensorsPound-feet Newton-meter Straps GroundingProcess Grounding Options Type of Pipe LiningGrounding with Grounding Electrode Conduit Ports and Connections WiringPower Outputs Coil Drive and Electrode Cables Power OutputsRemote Mount Cable Requirements and Preparation Transmitter to Sensor WiringPart Number Wiring the Transmitter to the SensorTransmitter Terminal Sensor Terminal Wire Gauge Wire Color DescriptionRemote Mount Wiring Diagrams Cabling considerations Connect the 4-20 mA Analog SignalInternal Power Source External Power SourceDisconnects Powering the TransmitterSupply Wire Requirements Installation CategoryAC Ground or DC Ground Transmitter Power Cable 8712E Power SupplyFuse Basic Setup Review Basic SetupLocal Operator Interface Function Fast Keys Process Variables PVInternational Certificates Product CertificationsApproved Manufacturing Locations European Directive InformationN7 IECEx Type n European Certifications N1 Atex Type nSpecial Conditions for Safe Use International CertificationsSensor Approval Information Rosemount 8705 and 8711 Sensors Meter Size Inches Maximum Ambient TemperatureMaximum Process EC Declaration of Conformity Schedule
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