Kobold NBK-RA Operating Instructions Manual
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Kobold NBK-RA Operating Instructions Manual

Limit switch
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Operating Instructions
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Limit switch
Model: NBK-RA

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Summary of Contents for Kobold NBK-RA

  • Page 1 Operating Instructions Limit switch Model: NBK-RA...

  • Page 2: Table Of Contents

      EU Declaration of Conformance ..............13     Type Examination Certificate ..............14     Manufactured and sold by: Kobold Messring GmbH Nordring 22-24 D-65719 Hofheim Tel.: +49 (0)6192-2990 Fax: +49(0)6192-23398 E-Mail: info.de@kobold.com Internet: www.kobold.com page 2 NBK-RA K01/0823...

  • Page 3: Note

    Please read these operating instructions before unpacking and putting the unit into operation. Follow the instructions precisely as described herein. The instruction manuals on our website www.kobold.com are always for currently manufactured version of our products. Due to technical changes, the instruction manuals available online may not always correspond to the product version you have purchased.

  • Page 4: Regulation Use

     Make sure that only accessories are used in hazardous areas that meet all the requirements of the European directives and national legislation. The contacts NBK-RA with ATEX approval meet the requirements of category 2 GD. The proximity switches with ATEX approval are used in the following zones: ...

  • Page 5: Operating Principle

    NBK-RA 5. Operating Principle Kobold Bypass Limit Transmitter are used for the monitoring of limit values in tanks or vessels. They are firmly attached with mounting plates and ribbon clamps to the Bypass Level Indicator, model NBK, and can be moved to any position on the bypass-tube within the measuring length.

  • Page 6: Mechanical Connection

    NBK-RA 6. Mechanical Connection Mount and tighten the reed switch (NBK-RA) - if available - on the bypass tube at the opposite side of the roller indicator with the provided ribbon clamps (ex contact: two ribbon clamps). The height of the switch contacts may be selected at will.

  • Page 7: Electrical Connection

    NBK-RA 7. Electrical Connection Limit switch NBK-R, NBK-RM, NBK-RT, NBK-RA Attention! Observe the allowed electrical ratings for the limit switch. NBK-RA Maximum values ATEX-contact Switching capacity: 45 W/VA 0,6 A Switching current: Switching voltage: 230 V AC/DC Note to NBK-RA: ATEX- contact Protect the circuit of the limit contact with a fuse.

  • Page 8: Commissioning

    Hysteresis Hysteresis is the difference between contact closing and opening points. A hysteresis of approximately 15 mm float travel is achieved by factory tuning of the float magnet and contact strength. page 8 NBK-RA K01/0823...

  • Page 9: Technical Information

    NBK-RA 9. Technical Information ATEX limit switch, model NBK-RA Contact operation: bistable changeover contact encapsulated Switching hysteresis: approximately 15 mm Max. switching capacity: 45 VA, 230 V , 0,6 A AC/DC Temperature class: T6 / T5 Max. medium temperature: 70 °C / 85 °C...

  • Page 10: Order Codes

    NBK-RA 10. Order Codes ATEX-limit contact, encapsulated, II 2G Ex mb IIC T6/T5 Gb NBK-RA II 2D Ex mb IIIC IP67 T 105 °C Db page 10 NBK-RA K01/0823...

  • Page 11: Illustrations

    NBK-RA 11. Illustrations NBK-RA NBK-RA K01/0823 page 11...

  • Page 12: Disposal

    (Cd, Hg, Li or Pb) of the heavy metal that is decisive for the classification as containing pollutants: 1. „Cd" stands for cadmium 2. „Hg" stands for mercury 3. „Pb" stands for lead 4. „Li" stands for lithium Electrical and electronic equipment page 12 NBK-RA K01/0823...

  • Page 13: Eu Declaration Of Conformance

    NBK-RA 13. EU Declaration of Conformance We, KOBOLD Messring GmbH, Hofheim-Ts, Germany, declare under our sole responsibility that the product: Limit contact model: NBK-RA (ELOBAU 610*) to which this declaration relates is in conformity with the standards noted below: EN 60079-0:2012...

  • Page 14: Type Examination Certificate

    NBK-RA 14. Type Examination Certificate page 14 NBK-RA K01/0823...
  • Page 15 NBK-RA NBK-RA K01/0823 page 15...
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  • Page 20 NBK-RA page 20 NBK-RA K01/0823...
  • Page 21 NBK-RA NBK-RA K01/0823 page 21...

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