Emerson Rosemount 8732 Hardware, Jumpers/Switches, Conduit Ports and Connections Conduit Cables

Rosemount 8732

Reference Manual

00809-0100-4665, Rev AA August 2010

Hardware	The 8732 Profibus PA electronics board is equipped with two user-selectable
Jumpers/Switches	hardware switches. These switches do not have any functionality and should
	be left in the default positions as listed below:
	Simulate Enable	OFF
	Transmitter Security	OFF

Conduit Ports and Connections

Conduit Cables

Changing the switch position will have no effect on the functionality of the electronics.

Both the sensor and transmitter junction boxes have ports for 1/2-inch NPT conduit connections, with optional CM20 and PG 13.5 adapter connections available. These connections should be made in accordance with national, local or plant electrical codes. Unused ports should be sealed with metal plugs and PTFE tape or other thread sealant. Connections should also be made in accordance with area approval requirements, see examples below for details. Proper electrical installation is necessary to prevent errors due to electrical noise and interference. Separate conduits are not necessary for the coil drive and signal cables connecting the transmitter to the sensor, but a dedicated conduit line between each transmitter and sensor is required. A shielded cable must be used.

Example 1: Installing flanged sensors into an IP68 area. Sensors must be installed with IP68 cable glands and cable to maintain IP68 rating. Unused conduit connections must be properly sealed to prevent water ingress. For added protection, dielectric gel can be used to pot the sensor terminal block. Consult technical document 00840-0100-4750 when installing meters into an IP68 installation.

Example 2: Installing flowmeters into explosion proof/flameproof areas. Conduit connections and conduit must be rated for use in the hazardous area to maintain flowmeter approval rating. Consult Appendix B: of this manual for installation requirements for hazardous areas.

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. Do not run power cables and output signal cables in the same conduit. For remote mount installations, run the coil drive and electrode cables between the flowmeter and transmitter. Refer to Electrical Considerations for wire type. Prepare the ends of the coil drive and electrode cables as shown in Figure 2-2.Limit the unshielded wire length to 1-in. on both the electrode and coil drive cables. Excessive lead length or failure to connect cable shields can create electrical noise resulting in unstable meter readings.

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