Good Price Rosemounte 3051s High Accuracy 4-20 Ma Terminal Blocks¹

Product DescriptionProduct DescriptionRosemount 3051S Terminal BlocksThe terminal blocks in the Rosemount 3051S are constructed using high - quality materials to ensure durability and reliable electrical performance. The base material of the terminal block is often a flame - retardant and heat - resistant plastic. This type of plastic can withstand the high temperatures that may be encountered in industrial environments, especially in close proximity to the transmitter electronics, which can generate heat during operation. For example, materials like polyamide (PA) are commonly used due to their excellent mechanical and electrical properties, including high tensile strength, good insulating capabilities, and resistance to chemical corrosion.The conductors within the terminal blocks are typically made of copper or copper - alloy materials. Copper is an ideal choice as it has extremely low electrical resistance, which is essential for minimizing signal losses during the transmission of electrical signals. High - purity copper ensures that the voltage drop across the terminal block connections is negligible, maintaining the integrity of the electrical signals being transferred. In some cases, the copper conductors may be plated with materials such as tin or nickel. Tin plating, for instance, provides an additional layer of protection against oxidation, further enhancing the long - term reliability of the connection. Nickel plating can offer improved corrosion resistance in more harsh chemical environments.1. Types of Terminal Blocks in Rosemount 3051S1.1 Standard Terminal BlocksStandard terminal blocks in the Rosemount 3051S are the most commonly used type. They are designed to handle the basic electrical connections required for the operation of the transmitter. These terminal blocks typically have a set number of connection points, usually ranging from 2 to 8, depending on the model of the transmitter. They are used to connect the power supply wires, such as the positive and negative leads of a 24 - VDC power source. In a typical setup, the positive power wire is connected to the terminal marked "+" or "PWR/COMM+", while the negative power wire is connected to the terminal marked "–".Standard terminal blocks also serve as connection points for signal wires. For example, the 4 - 20 mA output signal, which is a common analog signal used to transmit the measured process variable (such as pressure or flow rate) from the transmitter to a control system, is connected to specific terminals on the standard terminal block. 1.2 Terminal Blocks for Special Applications1.2.1 Intrinsically Safe Terminal BlocksIn hazardous areas where there is a risk of explosion due to the presence of flammable gases, vapors, or dust, Rosemount 3051S may be equipped with intrinsically safe terminal blocks. These terminal blocks are designed to prevent the ignition of the surrounding hazardous substances by limiting the energy that can be released from the electrical connections. 1.2.2 Terminal Blocks for Remote Display SystemsFor applications where a remote display is required to monitor the process variable readings from the Rosemount 3051S transmitter, special terminal blocks are used. The remote display system typically consists of a local transmitter and a remote - installed LCD display. The terminal blocks in this case are designed to facilitate the connection between the two components.The local transmitter component contains a terminal block with a set of connection points dedicated to the remote display system. These terminals are used to connect the communication wires that transmit the data from the transmitter to the remote display. The remote - installed LCD display also has its own terminal block, which receives the incoming data and powers the display. 2. Safety Considerations during Wiring2.1 Electrical Safety2.1.1 Risk of Electric ShockElectric shock is a significant risk when working with the electrical connections of the Rosemount 3051S terminal blocks. The power supply voltage, typically 24 - VDC, may not seem high, but it can still cause injury if proper safety precautions are not taken. To mitigate this risk, always turn off the power supply before starting any wiring work. Use appropriate personal protective equipment (PPE), such as insulated gloves and safety glasses. Insulated gloves should be rated for the voltage being worked with and should be regularly inspected for any signs of damage, such as cuts or punctures.When handling the wires and terminal blocks, avoid touching the exposed conductors. Even after the power is turned off, there may be residual electrical charge in some components.2.1.2 Overloading and Short - CircuitsOverloading of the electrical circuits connected to the Rosemount 3051S terminal blocks can cause damage to the transmitter and other connected devices. Ensure that the power supply has sufficient capacity to handle the current requirements of the transmitter and any additional devices connected to it. Do not connect too many devices to a single power supply or terminal block if the power supply is not rated to handle the combined load.Short - circuits can also occur if the wires are not properly connected or if there is a break in the insulation. To prevent short - circuits, always ensure that the wires are inserted fully into the terminal block connection points and that the screws are tightened securely.2.2 Environmental Safety2.2.1 Hazardous Area InstallationIn hazardous areas, the installation of the Rosemount 3051S terminal blocks must comply with strict safety regulations. As mentioned earlier, if the area is classified as hazardous due to the presence of flammable gases, vapors, or dust, intrinsically safe terminal blocks and wiring methods must be used. The wiring in hazardous areas should be properly routed and protected to prevent any potential sources of ignition. Use conduits or armored cables to protect the wires from physical damage. Make sure that all connections are made in approved enclosures and that any unused terminals are properly sealed to prevent the ingress of hazardous substances.SpecificationHousing MaterialFlame-retardant polymer or stainless steel (for corrosive environments)Terminal MaterialNickel-plated brass or gold-plated contacts for optimal conductivityProtection RatingNEMA 4X / IP66 (dust-tight, water-resistant)Temperature Range–40°C to +85°C (–40°F to +185°F)ModularityRemovable terminal block for easy maintenanceCertificationsATEX, IECEx, SIL 2/3 (functional safety)Power Supply Range12–42 V DC (9–45 V DC for some models)Current Consumption3.5–22 mA (depends on configuration)About UsMain productKeRui (WeiFang) Automation Equipment Co., Ltd. is specialized in industrialautomation instrument development, production and sales, technical servicesand supporting equipment supply of specialized companies. The mainproducts are fow meters, level meters, temperature meters, pressuremeters, electrical meters, thermal meters, programmable controller(PLC),Dcs distributed control system, eight series of more than 1,000specifcations. lts products and technologies are widely used in electricpower, metallurgy, petrochemical, environ- mental protection, plasticsfood,l printing, tobacco, textile, dyeing and other fields.Valve Positioner: A valve positioner is a crucial control device that precisely regulates the position of control valves in industrial processes. It receives control signals from a controller and compares them with the actual valve position.Flowmeter: A flowmeter is an instrument designed to measure the flow rate of liquids, gases, or steam within a pipeline or channel. Transmitter: A  transmitter is a device that senses a physical parameter, like pressure, temperature, or level, and converts it into a standardized output signal, usually 4 - 20 mA DC or digital signals. CertificationsOur ServiceOEM / ODM servicesTo meet the user diversified requirement, Holykell have established a set of customer service and technical support system with OEM / ODM order as the center, and responded and Handle the customer's requirements in a timely manner to ensure accurate delivery time and product quality.Order servicesFastest reply:Professional sales engineers 7/24 online servicesPayment terms:T/T ,Western union, Paypal, Credit Card, L/C othersFast delivery: within 24 hours release the cargo (normal spec.), Customized 7-12 days after payment . MAINTENANCE & AFTER-SALES SERVICESCustomer Feedback:  Sales engineers and technical engineers will be one-on-one service for you to exclude all obstacles when use our sensors.Warranty period: 12 monthsProduct life-long maintenance: Holykell can provide you with the maintenance of the whole life of the sensorsPackaging & ShippingFAQQ1: How long will it take you to give me the reply?A: We will reply to you as soon as we see the informationQ2: What is the delivery time?A: Our delivery time is within 3- 7 days after we get your payment; for large qty mass orders, the time should be confirmed again for youQ3: How about your package? A: Do not worry about the package. We have a lot of experience in packing, and all our packages are wooden case packages.Q4: How about the payment terms?A: You can choose T/T.Q5: Do you provide samples? A: Yes, we have materials in stock to help you get the samples as soon as we can.Q6: What is the MOQ?A:1PC.Q7: Can I get a lower price if I order large quantities? A: Yes, cheaper prices with larger orders.Q8: Why choose us?We have a perfect customization, not only to provide you with quality products, but also to have a professional customer service team available at any time to provide you with support. We pay more attention to establishing a long-term cooperative relationship with you to achieve continuous business growth.Q9: How can we guarantee quality?We have strict requirements on the quality of our products, and we will conduct a final inspection of our products when we ship them.

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