FOXBORO P0916NK differential pressure transmission cable

FOXBORO P0916NK differential pressure transmission cable

Product Core Overview

The FOXBORO P0916NK differential pressure transmission cable is an industrial shielded signal cable mainly used in differential pressure measurement systems. It is responsible for transmitting weak analog signals (usually 4-20mA standard signals) output by differential pressure transmitters (such as FOXBORO I/A Series differential pressure transmitters) to control systems such as PLC and DCS. Unlike ordinary cables, this cable adopts a special structural design and material selection to effectively suppress electromagnetic interference in industrial sites, reduce signal attenuation, ensure the accuracy and real-time transmission of differential pressure data, and is an indispensable key component in differential pressure measurement systems due to the weak and easily interfered characteristics of differential pressure signals.

Core technical characteristics

The design of FOXBORO P0916NK differential pressure transmission cable fully meets the special requirements of industrial differential pressure signal transmission and has the following core technical characteristics:

1. Low loss signal transmission capability

The 4-20mA analog signal output by the differential pressure transmitter is a weak signal that is prone to attenuation during long-distance transmission. The cable uses high-purity oxygen free copper as the conductor material, which has better conductivity than ordinary copper and can effectively reduce resistance loss during signal transmission; At the same time, the insulation layer of the cable is made of high-quality polyethylene (PE) material, which has stable dielectric properties and can reduce the dielectric loss of the signal, ensuring that the signal attenuation is controlled within 0.5% within a transmission distance of hundreds of meters, and guaranteeing the accurate restoration of differential pressure data.

2. Strong anti electromagnetic interference design

There are a large number of interference sources such as motors, frequency converters, and high-voltage equipment in industrial sites, which can easily cause electromagnetic interference to differential pressure signals and lead to measurement data distortion. P0916NK cable adopts a "double shielding" structure - the inner layer is tinned copper wire braided shielding, with a coverage rate of ≥ 90%, which can effectively shield high-frequency electromagnetic interference; The outer layer is made of aluminum foil composite shielding, which has a good suppression effect on low-frequency interference. The dual shielding design ensures that the anti-interference performance of the cable meets the industrial EMC (Electromagnetic Compatibility) Class B standard, enabling stable signal transmission in strong electromagnetic environments and avoiding control errors caused by interference.

3. Industrial grade environmental adaptability

In response to the complex environment of industrial sites, cables have been specially reinforced in terms of structure and materials. The outer sheath is made of polyvinyl chloride (PVC) or polyurethane (PU) materials that are resistant to oil, aging, and chemical corrosion, and can resist the erosion of media such as petroleum, chemical raw materials, and coolant; At the same time, the cable has good temperature resistance, with a working temperature range covering -40 ℃~80 ℃, and can adapt to various extreme environments such as high-temperature metallurgical workshops, low-temperature outdoor instrument cabinets, and humid chemical plant areas, ensuring long-term stable operation.

4. Stable mechanical performance

The cable conductor adopts a multi strand thin copper wire twisted structure, which has good flexibility and is easy to bend and route in narrow spaces. At the same time, its tensile strength is better than that of a single strand conductor; The outer sheath has undergone wear-resistant treatment and is not easily damaged during dragging and laying, effectively protecting the internal conductor and shielding layer. In addition, the cable has excellent vibration resistance and can maintain stable signal transmission performance in areas with strong vibration such as near the motor and pump body.

Key technical parameters

Technical parameters are the core indicators that reflect the performance of cables. The parameter configuration of FOXBORO P0916NK differential pressure transmission cable accurately matches the transmission requirements of differential pressure signals, as follows:

1. Conductor parameters

-Conductor material: high-purity oxygen free copper (purity ≥ 99.97%)

-Conductor structure: Stranded multiple strands of fine copper wire (strands ≥ 19, single wire diameter 0.12mm)

-Conductor cross-sectional area: Typical specification 0.5mm ²/0.75mm ² (can be selected according to transmission distance)

-DC resistance: ≤ 20 Ω/km (0.5mm ² specification at 20 ℃)

2. Insulation and shielding parameters

-Insulation material: High density polyethylene (HDPE)

-Insulation thickness: 0.8mm ± 0.1mm

-Shielding structure: Inner layer tinned copper wire weaving (weaving density ≥ 90%)+outer layer aluminum foil shielding (thickness ≥ 0.05mm)

-Shielding resistance: ≤ 5 Ω/km (at 20 ℃)

3. Transmission and environmental parameters

-Transmission signal type: 4-20mA analog signal, 0-5V DC signal (applicable to differential pressure transmitter output)

-Maximum transmission distance: 0.5mm ² specification ≤ 300m, 0.75mm ² specification ≤ 500m (signal attenuation ≤ 0.5%)

-Working temperature range: -40 ℃~80 ℃ (fixed installation), -20 ℃~60 ℃ (mobile installation)

-Environmental adaptability: Oil resistance level IP65, chemical corrosion resistance (acid, alkali, organic solvent resistance)

4. Mechanical performance parameters

-Bending radius: Fixed laying ≥ 6 times the outer diameter of the cable, mobile laying ≥ 10 times the outer diameter of the cable

-Tensile strength: ≥ 10N/mm ²

-Wear resistance: in accordance with GB/T 2951.21-2008 standard (wear resistance times ≥ 10000 times)

Typical application scenarios

FOXBORO P0916NK differential pressure transmission cable, as a dedicated transmission component for differential pressure measurement systems, is widely used in various industrial scenarios that require precise monitoring of differential pressure. Typical applications include:

1. Petrochemical industry

In equipment such as distillation towers for petroleum refining and reaction vessels for chemical synthesis, differential pressure transmitters are used to monitor the liquid level difference inside the tower and kettle (converted to liquid level through differential pressure conversion). P0916NK cables connect the transmitter to the DCS system, accurately transmitting differential pressure signals to the control system to achieve real-time monitoring and automatic control of liquid level, avoiding safety accidents caused by high or low liquid levels.

2. Power industry

In equipment such as boiler steam drums and turbine condensers for thermal power generation, differential pressure transmitters are used to monitor parameters such as differential pressure and vacuum degree between steam and water. The cable transmits the differential pressure signal to the PLC control system, providing accurate data support for boiler water level regulation and turbine operation control, ensuring the stable operation of the power generation system.

3. Water treatment industry

In equipment such as sedimentation tanks for sewage treatment and filtration tanks for water plants, differential pressure transmitters are used to monitor the blockage of filter membranes and screens (determined by changes in inlet and outlet differential pressure). The P0916NK cable transmits differential pressure signals to the control system, and when the differential pressure exceeds a threshold, it automatically triggers a backwash program to ensure the filtration efficiency of the water treatment system.

4. Metallurgy and papermaking industry

In the metallurgical industry's blast furnace hot blast stove and the paper industry's pulp storage tank, differential pressure transmitters are used to monitor the pressure difference inside the equipment. Cables stably transmit signals in high temperature, high dust, or high humidity environments, providing reliable data for equipment temperature control and material conveying control, improving production efficiency and product quality.