Railway pressure transmitter NAR 8258

Product catalog summary

Overview: The document provides detailed technical specifications for the Trafag NAR 8258 Railway Pressure Transmitter, designed for railway vehicles. It highlights the transmitter's high accuracy, long-term stability, and compliance with railway standards.

Applications: The NAR 8258 is suitable for railway vehicles, offering a measuring accuracy of 0.3% and optional switching outputs with PnP transistors. It is designed to withstand harsh environmental conditions with a temperature range from -40°C to +125°C.

Technical Specifications:

Measuring Principle: Thin film on steel.
Temperature Range: -40°C to +125°C for both media and ambient temperatures.
Output Signal: 4-20 mA, with options for 1 or 2 PnP transistors.
Accuracy: Typical accuracy at 25°C is ±0.3% FS.
Pressure Range: Available from 0-6 bar to 0-600 bar (0-100 psi to 0-7500 psi).

Ordering Information: The document provides a detailed type code for ordering, specifying pressure ranges, overpressure, burst pressure, pressure connections, and electrical connections.

Environmental and Mechanical Data:

Protection: IP65 and IP67 ratings.
Vibration and Shock Resistance: Vibration up to 25 g and shock up to 100 g.
Material: Wetted parts made of 1.4542 (AISI630) and housing of 1.4301 (AISI304).

Additional Specifications for Railways: The transmitter meets EN 50155 for dielectrical strength and EN 45545-2 for fire protection. It is designed to operate under cold, dry heat, and damp heat conditions as per EN 60068 standards.

Diagrams and Graphs: The document includes diagrams for dimensions, electrical connections, and load resistor vs. supply voltage graphs, illustrating the operational parameters and installation guidelines.

Conclusion: The Trafag NAR 8258 is a robust and precise pressure transmitter tailored for railway applications, ensuring reliability and compliance with stringent railway standards.

Catalog excerpts

RAILWAY PRESSURETRANSMITTER Swiss based Trafag is a leading international supplier of high quality sensors and monitoring instruments for measurement of pressure and temperature. The pressure transmitter NAR 8258 with increased accuracy of 0.3 % was specifically designed for railway vehicles (EN 50155) and has a long-term stable thin-film-on-steel sensor cell. The wide temperature range from -40°C to +125°C and the triple overpressure protection make the NAR 8258 the ideal choice for railway vehicles in rough environmental conditions. Features ■ measuring accuracy 0.3 % ■ Optional: switching output 1 or 2 PNP transistors ■ excellent long-term stability ■ Dielectrical strength: 710 VDC, meets EN 50155 (Railways) subject to change Data sheet H72307 a 05/2017 Trafag Sensors & Controls Industriestrasse 11 sensors controls

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Ordering information/type code Female electrical plug M 12x1,5-pole 2) 33 Output signal Female electrical connector industrial standard (for electrical connection 01) Parameterisation according to customer specification (see table parameter), for output signal PS, T1 ZC 1) Customized pressure ranges upon request 2) For electrical connections 32 and 35 3) Only with electrical connection 32 4) max. allowable pressure range 60 bar at 120 bar overpressure 5) max. allowable pressure range 160 bar at 500 bar overpressure 6) Only for pressure connections 17, 30, 32 7) According to norm J1926,...

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11 See electrical connection 2) Surge voltage on shield, shield connected on both sides trofaq sensors ^^controls

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Measuring accuracy trofaq sensors ^^controls

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11 in Category 3 the 2010 versions' higher severity levels apply in each case 2) Chapter 5.1 Voltage supply trofaq sensors ^^controls

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NAR 8258 Electrical connection Protection / electrical connection IP65 *) **) Industrial standard Contact distance 9.4 mm Output signal 8258.xx.xxxx.xx.PS/T1 *) Provided female connector is mounted according to instructions **) Ventilation via male electric plug/cable end 4...20mA: min./max resistor vs. supply voltage @ Pmax = 100% 1200 Customer Load Resistor (Ohm) Rmax Rmin 100°C Rmin 125°C Connection of loads to switching output Customer Supply Voltage (V)

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