Reference Manual

00809-0100-4808, Rev CA June 2008

Rosemount 3051N

Setting the Loop to Manual

Wiring Diagrams (Bench Hook-up)

FIGURE 2-3. Bench Hook-up (4–20 mA Transmitters).

To commission on the bench, connect the transmitter and the communicator as shown in Figure 2-3.Make sure the instruments in the loop are installed in accordance with intrinsically safe or nonincendive field wiring practices before connecting a communicator in an explosive atmosphere. Connect the communicator leads at any termination point in the signal loop. It is most convenient to connect them to the terminals labeled “COMM” on the terminal block. Connecting across the “TEST” terminals will prevent successful communication. To avoid exposing the transmitter electronics to the plant environment after installation, set all transmitter jumpers during the commissioning stage on the bench.

For 4–20 mA transmitters, you will need a power supply capable of providing

10.5to 55 V dc at the transmitter, and a meter to measure output current. To enable communication, a resistance of at least 250 ohms, but within the transmitter load limitations (see Figure 3-7“Power Supply Load Limitations.” in Section 3) must be present between the communicator loop connection and the power supply. Do not use inductive-based transient protectors with the Rosemount 3051N.

Whenever you are preparing to send or request data that would disrupt the loop or change the output of the transmitter, you must set your process application loop to manual. The HART Communicator will prompt you to set the loop to manual when necessary. Keep in mind that acknowledging this prompt does not set the loop to manual. The prompt is only a reminder; you have to set the loop to manual yourself as a separate operation.

Connect the bench equipment as shown in Figure 2-3and turn on the HART-based Communicator by pressing the ON/OFF key. The communicator will search for a HART-compatible device and will indicate when the connection is made. If the communicator fails to connect, it will indicate that no device was found. If this occurs, refer to Section 4: Troubleshooting.

Current

24 V dc

Supply

Meter

 

 

RL≥250Ω

See “Safety Messages” on page 2-1for warning information.

2-5

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Emerson Process Management 3051N manual Setting the Loop to Manual Wiring Diagrams Bench Hook-up
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3051N specifications

The Emerson Process Management 3051N is a state-of-the-art pressure transmitter that exemplifies precision and reliability in process automation. Designed for a wide range of industrial applications, the 3051N is celebrated for its advanced features, innovative technologies, and robust construction, catering to the evolving needs of process industries.

One of the standout features of the 3051N is its exceptional accuracy. With a standard accuracy rating of ±0.075% of span, it ensures precise pressure measurements, critical for maintaining optimal process conditions. This high level of accuracy makes it suitable for applications in industries such as oil and gas, chemicals, and water treatment, where even minor deviations can lead to significant operational issues.

The 3051N employs Smart Pressure Technology, integrating digital communication capabilities with traditional analog systems. This technology allows for seamless interoperability with existing process control systems, providing users with vital data for diagnostics, calibration, and configuration via HART, FOUNDATION fieldbus, or Profibus protocols. These capabilities lead to enhanced process efficiency and reduced downtime due to effective predictive maintenance.

Another notable characteristic of this transmitter is its robust design. The 3051N is built to endure harsh industrial environments, with a rugged housing that is resistant to corrosive and hazardous conditions. Its wide operating temperature range, typically from -40°C to 85°C, coupled with various diaphragm materials, ensures that it can function effectively across diverse applications.

Moreover, the Emerson 3051N incorporates advanced predictive diagnostics, enabling users to monitor the health of the transmitter continuously. This feature alerts operators to potential issues before they escalate, facilitating proactive maintenance strategies that can significantly lower operational costs.

The flexible configuration options offered by the 3051N also enhance its usability. Users can select from a variety of pressure ranges, process connection types, and electrical connections, making it easy to customize the transmitter to fit specific application needs.

In conclusion, the Emerson Process Management 3051N pressure transmitter is a versatile and highly efficient device that integrates advanced technology with robust design and exceptional accuracy. Its ability to adapt to various industrial demands while providing predictive diagnostics makes it a preferred choice for professionals seeking reliability and precision in process management.
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