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GESTRA NRS 2-40 Installation Instructions Manual

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NRS 2-40
Installation Instructions 810371-02
Level Switch Type NRS 2-40
1

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Summary of Contents for GESTRA NRS 2-40

  • Page 1 NRS 2-40 Installation Instructions 810371-02 Level Switch Type NRS 2-40...

  • Page 2: Table Of Contents

    Explanatory Notes Scope of supply ......................8 System description ......................8 Function .......................... 8 Technical data ......................... 9 Installation NRS 2-40 ........................10 Example of installation ....................29 Wiring Wiring diagram ...................... 3, 4, 11 Basic Adjustment CAN bus ........................12 Node ID .........................
  • Page 3 Terminating resistor Fig. 1 120 Ω Ω Ω Ω Ω Control terminal Level switch Controller Level electrodes Electrodes URB 1 NRS 2-40 . . . NRG 26-40 . . . CEP*) Power supply CAN data line Terminating resistor Terminating resistor 120 Ω...
  • Page 4 Wiring Diagram Discharge control – Pump OFF at low level ( Pump contactor Potentiometer optional output Paired cable for actual value 4-20 mA Paired cable Terminating resistor Fig. 3 120 Ω Ω Ω Ω Ω Fill control – Pump OFF at high level ( Pump contactor Potentiometer optional output...
  • Page 5 Parts Drawing Fig. 5 Fig. 6...
  • Page 6 Indicator LEDs Discharge control Fill control LED 1 – switchpoint 1 High-level alarm High-level alarm LED 2 – switchpoint 2 Pump ON Pump OFF LED 3 – switchpoint 3 PUMP OFF Pump ON LED 4 – switchpoint 4 Low-level alarm Low-level alarm LED “Bus status”...

  • Page 7: Important Notes

    Important Notes Usage for the intended purpose Use level switch NRS 2-40 in conjunction with level electrode NRG 26-40 only for liquid level monitoring and control. Safety notes The equipment must only be installed by qualified staff. Qualified staff are those persons who – through adequate training in electrical engineering, the use and application of safety equipment in accordance with regulations concerning electrical safety systems, and first aid &...

  • Page 8: Explanatory Notes

    At regular intervals the level electrode type NRG 26-40 sends a data telegram to the level switch NRS 2-40. The data transfer is effected by means of a CAN bus according to DIN ISO 11898. The transferred measuring data are then evaluated and assigned to the manually adjusted switchpoints.

  • Page 9: Technical Data

    Technical data Type approval no. NRS 2-40: TÜV · WR · 98-399 Input / Output Interface for CAN bus to DIN ISO 11898 using CANopen Output – voltage supply for electrodes Power supply 24 V DC, short-circuit protected Analogue output 4 – 20 mA, load 500 Ω for display of actual value (optional).

  • Page 10: Wiring Diagram

    Installation NRS 2-40 Installation on mounting rail 1. Clip level switch onto mounting rail 35 x 15 mm (DIN EN 50022). 2. Align level switch, fig. 14, fig. 15 Tool Screwdriver (5.5/100) Wiring Note that screened multi-core twisted-pair control cable is required, e. g.
  • Page 11 Wiring – continued – Attention Wire equipment in series. Star-type wiring is not permitted. Interlink screens of control cables such that electrical continuity is ensured and connect them once to the central earthing point (CEP). To protect the switching contacts fuse circuit with T 2.5 A or according to TRD regulations (1.0 A for 72 hrs.).

  • Page 12: Basic Adjustment

    The CAN address (Node ID) can be set between 1 and 123. The NRS 2-40 is configured at our works and ready for service with other GESTRA system components without having to set the node ID.

  • Page 13: Factory Setting

    Basic Adjustments – continued – Factory setting The level switch features the following factory set default values: Baud rate: 250 kb/s Relay with energizing delay switchpoint 1: 1s Relay with energizing delay switchpoint 2: 1s Control equipment: 1 Node ID: 039 Relay with energizing delay switchpoint 3: 1s Control equipment: 2 Relay with energizing delay switchpoint 4: 1s...

  • Page 14: Commissioning

    Commissioning NRS 2-40 Apply power to the unit. Indicator LEDs flash rapidly The four indicator LEDs flash rapidly. The LED “Power” lights up. The system test cycle takes about 2 sec. LED “Power” illuminated Control Range Desired control range [mm] Max.

  • Page 15: Establish Control Range

    Commissioning – continued – Establish control range Press button for 3 sec. LEDs illuminated LEDs flash slowly Lower the liquid level in the vessel until the lower limit of the control range is reached. Use button if you want to establish the upper limit of the desired control range first.

  • Page 16: Establish Switchpoints Within Adjusted Control Range

    Establish control range – continued – Press button twice briefly. The upper limit of the desired control range is now saved. The NRS 2-40 is back in operating mode. twice briefly Establish switchpoints within the adjusted control range Switchpoint 1 Switchpoint 2...
  • Page 17 Commissioning – continued – Establish control range – continued – Press button briefly. LED illuminated LEDs flash slowly Lower or raise liquid level until switchpoint 4 within the adjusted control range is reached. Note: In the event of a system malfunction the LED(s) “Bus status”...
  • Page 18 Commissioning – continued – Establish control range – continued – Press button briefly. LED illuminated LEDs flash slowly Switchpoint 2 is now active. briefly Press button briefly. LED illuminated LEDs flash slowly Raise liquid level until switchpoint 2 within the adjusted control range is reached.

  • Page 19: Operation

    Establish control range – continued – Press button twice briefly. LED illuminated Switchpoint 1 is saved. The NRS 2-40 is again in operating mode. twice briefly Operation Normal operation Normal operation – switching controller is LEDs go out upon reaching the setpoint working.

  • Page 20: Relay Test High/Low ( Max / Min ) Level

    Max. admissible temperature in electrode terminal box exceeded No or faulty communication between switching controller and electrode Fault in CAN bus Failure of 24 V power supply unit built in level controller NRS 2-40 Danger The terminal strip of the NRS 2-40 is live during operation.

  • Page 21: System Malfunctions

    System Malfunctions – continued – Systematic Malfunction Analysis The sources of malfunctions occurring in CAN bus systems operating with several bus-based stations must be analysed systematically since faulty components or incorrect settings can give rise to negative interactions with intact bus devices in the CAN bus system.

  • Page 22: Analysis Of System Malfunctions 1 - 4

    System Malfunctions – continued – System malfunction 1 LEDs flash slowly The four indicator LEDs flash slowly. High/low-level alarm Fault: The max. admissible temperature in the electrode terminal box is exceeded. Remedy: Insulate electrode flange to protect the equipment against heat radiation. As soon as the temperature drops below the max.
  • Page 23 System Malfunctions – continued – System malfunction 3 LED “Bus status” flashes slowly. LED flashes slowly Fault: Malfunction in CAN bus. Remedy: Restart system. LED “Bus status” flashes slowly. High/low-level alarm LED flashes slowly Fault: Data transfer in CAN bus interrupted. Remedy: The bus cables have to be correctly connected according to the wiring diagram (observe polarity!).
  • Page 24 System Malfunctions – continued – System malfunction 4 LED “Power” flashes slowly. LED flashes slowly Fault: The power supply unit (PSU) is overloaded and may be misused for other components. Remedy: Check load of power supply unit. Be sure to use the PSU only for the voltage supply of bus-based network components.

  • Page 25: Fault-Finding List For Troubleshooting

    Malfunctions Danger The terminal strip of the NRS 2-40 is live during operation. This presents the danger of electric shock. Cut off power supply before mounting or removing the equipment. Fault-finding list for troubleshooting Device fails to work – indication of malfunction...
  • Page 26 Malfunctions – continued – Fault-finding list for troubleshooting – continued – Fault : “H ” switchpoint exceeded – no indication. LEVEL Remedy: Level switch defective. Replace equipment. If faults occur that are not listed above or cannot be corrected, please contact our service centre or authorized agency in your country.

  • Page 27: Annex

    Annex Danger The terminal strip of the NRS 2-40 is live during operation. This presents the danger of electric shock. Cut off power supply before mounting or removing the equipment. Factory set default node IDs Switching Level controller electrode The individual node IDs must be manually adjusted on the equipment.
  • Page 28 Annex – continued – Node ID Node ID Fig. 11 (Factory setting) Fig. 12 (Example) Cable length Baud rate 250 kBit/s 125 m 125 kBit/s 250 m 100 kBit/s 335 m 50 kBit/s 500 m 20 kBit/s 1000 m 50 kBit/s 1000 m Fig.

  • Page 29: Example Of Installation

    Annex – continued – Declaration of conformity We hereby declare that the equipment NRS 2-40 conforms to the following European guidelines: LV guideline 73/23/eec version 93/68/eec EMC guideline 89/336/eec version 93/68/eec which are based on the following harmonised standards: LV standard DIN EN 50178...
  • Page 30 Example of Installation Fig. 14 Fig. 15...
  • Page 31 For your notes...
  • Page 32 GESTRA Gesellschaften · GESTRA Companies · Sociétés GESTRA · Sociedades Gestra · Società GESTRA Vertretungen weltweit · Agencies all over the world · Représentations dans le monde entier · Representaciones en todo el mundo · Agenzie in tutto il mondo...

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