Emerson Rosemount 8732 manual Electrical Considerations

Reference Manual

00809-0100-4665, Rev AA August 2010

Rosemount 8732

Figure 2-2. Cable Preparation Detail

Electrical Considerations

	1.00
	(26)
	NOTE
	Dimensions are in
	inches
Cable Shield	(millimeters).

Before making any electrical connections to the Rosemount 8732, consider the following standards and be sure to have the proper power supply, conduit, and other accessories. When preparing all wire connections, remove only the insulation required to fit the wire completely under the terminal connection. Removal of excessive insulation may result in an unwanted electrical short to the transmitter housing or other wire connections.

Transmitter Input Power

The 8732 transmitter is designed to be powered by 90-250 V AC, 50–60 Hz or 12–42 V DC. The eighth digit in the transmitter model number designates the appropriate power supply requirement.

Model Number Power Supply Requirement

190-250 V AC

212-42 V DC

Supply Wire Temperature Rating

Use 14 to 18 AWG wire rated for the proper temperature of the application. For connections in ambient temperatures above 140 °F (60 °C), use a wire rated for 176 °F (80 °C). For ambients greater than 176 °F (80 °C), use a wire rated for 230 °F (110 °C). For DC powered transmitters with extended power cable lengths, verify that there is a minimum of 12 Vdc at the terminals of the transmitter.

Disconnects

Connect the device through an external disconnect or circuit breaker. Clearly label the disconnect or circuit breaker and locate it near the transmitter.

Requirements for 90-250 V AC Power Supply

Wire the transmitter according to national, local, and plant electrical requirements for the supply voltage. In addition, follow the supply wire and disconnect requirements on page 2-6.

Requirements for 12-42 V DC Power Supply

Units powered with 12-42 V DC may draw up to 1 amp of current. As a result, the input power wire must meet certain gauge requirements.

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